dnl dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST) dnl dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the dnl end of configure. This lets tested variables be reassigned, and the dnl conditional will depend on the final state of the variable. For a simple dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED. dnl m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl m4_divert_text([glibcxx_diversion],dnl AM_CONDITIONAL([$1],[$2]) )dnl ])dnl AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl dnl dnl Check to see what architecture and operating system we are compiling dnl for. Also, if architecture- or OS-specific flags are required for dnl compilation, pick them up here. dnl AC_DEFUN([GLIBCXX_CHECK_HOST], [ . $glibcxx_srcdir/configure.host AC_MSG_NOTICE([CPU config directory is $cpu_include_dir]) AC_MSG_NOTICE([OS config directory is $os_include_dir]) ]) dnl dnl Initialize the rest of the library configury. At this point we have dnl variables like $host. dnl dnl Sets: dnl SUBDIRS dnl Substs: dnl glibcxx_builddir (absolute path) dnl glibcxx_srcdir (absolute path) dnl toplevel_builddir (absolute path) dnl toplevel_srcdir (absolute path) dnl with_cross_host dnl with_newlib dnl with_target_subdir dnl plus dnl - the variables in GLIBCXX_CHECK_HOST / configure.host dnl - default settings for all AM_CONFITIONAL test variables dnl - lots of tools, like CC and CXX dnl AC_DEFUN([GLIBCXX_CONFIGURE], [ # Keep these sync'd with the list in Makefile.am. The first provides an # expandable list at autoconf time; the second provides an expandable list # (i.e., shell variable) at configure time. m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/c++20 src/c++23 src/c++26 src/filesystem src/libbacktrace src/experimental doc po testsuite python]) SUBDIRS='glibcxx_SUBDIRS' # These need to be absolute paths, yet at the same time need to # canonicalize only relative paths, because then amd will not unmount # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. glibcxx_builddir=`${PWDCMD-pwd}` case $srcdir in [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;; *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; esac toplevel_builddir=${glibcxx_builddir}/.. toplevel_srcdir=${glibcxx_srcdir}/.. AC_SUBST(glibcxx_builddir) AC_SUBST(glibcxx_srcdir) AC_SUBST(toplevel_builddir) AC_SUBST(toplevel_srcdir) # We use these options to decide which functions to include. They are # set from the top level. AC_ARG_WITH([target-subdir], AC_HELP_STRING([--with-target-subdir=SUBDIR], [configuring in a subdirectory])) AC_ARG_WITH([cross-host], AC_HELP_STRING([--with-cross-host=HOST], [configuring with a cross compiler])) AC_ARG_WITH([newlib], AC_HELP_STRING([--with-newlib], [assume newlib as a system C library])) # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't # available). Uncomment the next line to force a particular method. AC_PROG_LN_S #LN_S='cp -p' AC_CHECK_TOOL(AS, as) AC_CHECK_TOOL(AR, ar) AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) AM_MAINTAINER_MODE # Set up safe default values for all subsequent AM_CONDITIONAL tests # which are themselves conditionally expanded. ## (Right now, this only matters for enable_wchar_t, but nothing prevents ## other macros from doing the same. This should be automated.) -pme # Check for C library flavor since GNU/Linux platforms use different # configuration directories depending on the C library in use. AC_EGREP_CPP([_using_uclibc], [ #include #if __UCLIBC__ _using_uclibc #endif ], uclibc=yes, uclibc=no) AC_EGREP_CPP([_using_bionic], [ #include #if __BIONIC__ _using_bionic #endif ], bionic=yes, bionic=no) # Find platform-specific directories containing configuration info. # Also possibly modify flags used elsewhere, as needed by the platform. GLIBCXX_CHECK_HOST ]) dnl dnl Tests for newer compiler features, or features that are present in newer dnl compiler versions but not older compiler versions still in use, should dnl be placed here. dnl dnl Defines: dnl WERROR='-Werror' if requested and possible; g++'s that lack the dnl new inlining code or the new system_header pragma will die on -Werror. dnl Leave it out by default and use maint-mode to use it. dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if dnl compiler supports it and the user has not requested debug mode. dnl AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [ # All these tests are for C++; save the language and the compiler flags. # The CXXFLAGS thing is suspicious, but based on similar bits previously # found in GLIBCXX_CONFIGURE. AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_test_CXXFLAGS="${CXXFLAGS+set}" ac_save_CXXFLAGS="$CXXFLAGS" # Check for -ffunction-sections -fdata-sections AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections]) CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections' AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no]) if test "$ac_test_CXXFLAGS" = set; then CXXFLAGS="$ac_save_CXXFLAGS" else # this is the suspicious part CXXFLAGS='' fi if test x"$ac_fdsections" = x"yes"; then SECTION_FLAGS='-ffunction-sections -fdata-sections' fi AC_MSG_RESULT($ac_fdsections) AC_LANG_RESTORE AC_SUBST(SECTION_FLAGS) ]) dnl dnl If GNU ld is in use, check to see if tricky linker opts can be used. If dnl the native linker is in use, all variables will be defined to something dnl safe (like an empty string). dnl dnl Defines: dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible dnl LD (as a side effect of testing) dnl Sets: dnl with_gnu_ld dnl glibcxx_ld_is_gold (set to "no" or "yes") dnl glibcxx_ld_is_mold (set to "no" or "yes") dnl glibcxx_gnu_ld_version (possibly) dnl dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems. dnl AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [ # If we're not using GNU ld, then there's no point in even trying these # tests. Check for that first. We should have already tested for gld # by now (in libtool), but require it now just to be safe... test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' AC_REQUIRE([AC_PROG_LD]) AC_REQUIRE([AC_PROG_AWK]) # The name set by libtool depends on the version of libtool. Shame on us # for depending on an impl detail, but c'est la vie. Older versions used # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't # set (hence we're using an older libtool), then set it. if test x${with_gnu_ld+set} != xset; then if test x${ac_cv_prog_gnu_ld+set} != xset; then # We got through "ac_require(ac_prog_ld)" and still not set? Huh? with_gnu_ld=no else with_gnu_ld=$ac_cv_prog_gnu_ld fi fi # Start by getting the version number. I think the libtool test already # does some of this, but throws away the result. glibcxx_ld_is_gold=no glibcxx_ld_is_mold=no if test x"$with_gnu_ld" = x"yes"; then AC_MSG_CHECKING([for ld version]) changequote(,) if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then glibcxx_ld_is_gold=yes elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then glibcxx_ld_is_mold=yes fi ldver=`$LD --version 2>/dev/null | sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'` changequote([,]) glibcxx_gnu_ld_version=`echo $ldver | \ $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` AC_MSG_RESULT($glibcxx_gnu_ld_version) fi # Set --gc-sections. glibcxx_have_gc_sections=no if test "$glibcxx_ld_is_gold" = "yes" || test "$glibcxx_ld_is_mold" = "yes" ; then if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then glibcxx_have_gc_sections=yes fi else glibcxx_gcsections_min_ld=21602 if test x"$with_gnu_ld" = x"yes" && test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then glibcxx_have_gc_sections=yes fi fi if test "$glibcxx_have_gc_sections" = "yes"; then # Sufficiently young GNU ld it is! Joy and bunny rabbits! # NB: This flag only works reliably after 2.16.1. Configure tests # for this are difficult, so hard wire a value that should work. ac_test_CFLAGS="${CFLAGS+set}" ac_save_CFLAGS="$CFLAGS" CFLAGS='-Wl,--gc-sections' # Check for -Wl,--gc-sections AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) AC_TRY_LINK([ int one(void) { return 1; } int two(void) { return 2; } ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no]) if test "$ac_gcsections" = "yes"; then rm -f conftest.c touch conftest.c if $CC -c conftest.c; then if $LD --gc-sections -o conftest conftest.o 2>&1 | \ grep "Warning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi rm -f conftest.c conftest.o conftest fi if test "$ac_gcsections" = "yes"; then SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" fi AC_MSG_RESULT($ac_gcsections) if test "$ac_test_CFLAGS" = set; then CFLAGS="$ac_save_CFLAGS" else # this is the suspicious part CFLAGS='' fi fi # Set -z,relro. # Note this is only for shared objects. ac_ld_relro=no if test x"$with_gnu_ld" = x"yes"; then # cygwin and mingw uses PE, which has no ELF relro support, # multi target ld may confuse configure machinery case "$host" in *-*-cygwin*) ;; *-*-mingw*) ;; *) AC_MSG_CHECKING([for ld that supports -Wl,-z,relro]) cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"` if test -n "$cxx_z_relo"; then OPT_LDFLAGS="-Wl,-z,relro" ac_ld_relro=yes fi AC_MSG_RESULT($ac_ld_relro) esac fi # Set linker optimization flags. if test x"$with_gnu_ld" = x"yes"; then OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" fi AC_SUBST(SECTION_LDFLAGS) AC_SUBST(OPT_LDFLAGS) ]) dnl dnl Check for headers for, and arguments to, the setrlimit() function. dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE. dnl dnl Defines: dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits dnl various HAVE_LIMIT_* for individual limit names dnl AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [ AC_MSG_CHECKING([for RLIMIT_$1]) AC_TRY_COMPILE( [#include #include #include ], [ int f = RLIMIT_$1 ; ], [glibcxx_mresult=1], [glibcxx_mresult=0]) AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult, [Only used in build directory testsuite_hooks.h.]) if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi AC_MSG_RESULT($res) ]) AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS setrlimit_have_headers=yes AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, [], [setrlimit_have_headers=no]) # If don't have the headers, then we can't run the tests now, and we # won't be seeing any of these during testsuite compilation. if test $setrlimit_have_headers = yes; then # Can't do these in a loop, else the resulting syntax is wrong. GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA) GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS) GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM) GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS) GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE) # Check for rlimit, setrlimit. AC_CACHE_CHECK([for testsuite resource limits support], glibcxx_cv_setrlimit, [ AC_TRY_COMPILE( [#include #include #include ], [struct rlimit r; setrlimit(0, &r);], [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no]) ]) if test $glibcxx_cv_setrlimit = yes; then AC_DEFINE(_GLIBCXX_RES_LIMITS, 1, [Define if using setrlimit to set resource limits during "make check"]) fi fi AC_LANG_RESTORE ]) dnl dnl Check whether S_ISREG (Posix) or S_IFREG is available in . dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately. dnl AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_MSG_CHECKING([for S_ISREG or S_IFREG]) AC_CACHE_VAL(glibcxx_cv_S_ISREG, [ GCC_TRY_COMPILE_OR_LINK( [#include ], [struct stat buffer; fstat(0, &buffer); S_ISREG(buffer.st_mode);], [glibcxx_cv_S_ISREG=yes], [glibcxx_cv_S_ISREG=no]) ]) AC_CACHE_VAL(glibcxx_cv_S_IFREG, [ GCC_TRY_COMPILE_OR_LINK( [#include ], [struct stat buffer; fstat(0, &buffer); S_IFREG & buffer.st_mode;], [glibcxx_cv_S_IFREG=yes], [glibcxx_cv_S_IFREG=no]) ]) res=no if test $glibcxx_cv_S_ISREG = yes; then AC_DEFINE(HAVE_S_ISREG, 1, [Define if S_ISREG is available in .]) res=S_ISREG elif test $glibcxx_cv_S_IFREG = yes; then AC_DEFINE(HAVE_S_IFREG, 1, [Define if S_IFREG is available in .]) res=S_IFREG fi AC_MSG_RESULT($res) CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether poll is available in , and define HAVE_POLL. dnl AC_DEFUN([GLIBCXX_CHECK_POLL], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for poll], glibcxx_cv_POLL, [ GCC_TRY_COMPILE_OR_LINK( [#include ], [struct pollfd pfd[1]; pfd[0].events = POLLIN; poll(pfd, 1, 0);], [glibcxx_cv_POLL=yes], [glibcxx_cv_POLL=no]) ]) if test $glibcxx_cv_POLL = yes; then AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in .]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether writev is available in , and define HAVE_WRITEV. dnl AC_DEFUN([GLIBCXX_CHECK_WRITEV], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for writev], glibcxx_cv_WRITEV, [ GCC_TRY_COMPILE_OR_LINK( [#include ], [struct iovec iov[2]; writev(0, iov, 0);], [glibcxx_cv_WRITEV=yes], [glibcxx_cv_WRITEV=no]) ]) if test $glibcxx_cv_WRITEV = yes; then AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in .]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether LFS support is available. dnl AC_DEFUN([GLIBCXX_CHECK_LFS], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for LFS support], glibcxx_cv_LFS, [ GCC_TRY_COMPILE_OR_LINK( [#include #include #include ], [FILE* fp; fopen64("t", "w"); fseeko64(fp, 0, SEEK_CUR); ftello64(fp); lseek64(1, 0, SEEK_CUR); struct stat64 buf; fstat64(1, &buf);], [glibcxx_cv_LFS=yes], [glibcxx_cv_LFS=no]) ]) if test $glibcxx_cv_LFS = yes; then AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.]) fi AC_CACHE_CHECK([for fseeko and ftello], glibcxx_cv_posix_lfs, [ GCC_TRY_COMPILE_OR_LINK( [#include ], [FILE* fp; fseeko(fp, 0, SEEK_CUR); ftello(fp); ], [glibcxx_cv_posix_lfs=yes], [glibcxx_cv_posix_lfs=no]) ]) if test $glibcxx_cv_posix_lfs = yes; then AC_DEFINE(_GLIBCXX_USE_FSEEKO_FTELLO, 1, [Define if fseeko and ftello are available.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether the old Copy-On-Write basic_string should allocate a new dnl empty representation for every default-constructed basic_string. Without dnl this option, COW strings share a single empty rep in static storage, dnl but this only works if the linker can guarantee the static storage has dnl a unique definition in the process. It also doesn't work if basic_string dnl objects are stored in shared memory (see PR libstdc++/16612). dnl When fully dynamic strings are enabled, the static storage is not used dnl and a new empty string with reference-count == 1 is allocated each time. dnl Enabling this changes the libstdc++.so ABI. dnl dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0 dnl otherwise the macro is not defined. dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)] dnl Where DEFAULT is either `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [ GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory], [permit yes|no]) if test $enable_fully_dynamic_string = yes; then enable_fully_dynamic_string_def=1 else enable_fully_dynamic_string_def=0 fi AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}], [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults]) ]) dnl dnl Does any necessary configuration of the testsuite directory. Generates dnl the testsuite_hooks.h header. dnl dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. dnl dnl Sets: dnl enable_abi_check dnl GLIBCXX_TEST_WCHAR_T dnl GLIBCXX_TEST_THREAD dnl Substs: dnl baseline_dir dnl baseline_subdir_switch dnl AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ # Do checks for resource limit functions. GLIBCXX_CHECK_SETRLIMIT if $GLIBCXX_IS_NATIVE ; then # Look for setenv, so that extended locale tests can be performed. GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) fi if $GLIBCXX_IS_NATIVE && test $is_hosted = yes && test $enable_symvers != no; then case "$host" in *-*-cygwin*) enable_abi_check=no ;; *) enable_abi_check=yes ;; esac else # Only build this as native, since automake does not understand # CXX_FOR_BUILD. enable_abi_check=no fi # Export file names for ABI checking. baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}" AC_SUBST(baseline_dir) baseline_subdir_switch="$abi_baseline_subdir_switch" AC_SUBST(baseline_subdir_switch) ]) dnl dnl Does any necessary configuration for docbook in the docs directory. dnl dnl XSLTPROC must be set before this dnl dnl Sets: dnl glibcxx_stylesheets dnl Substs: dnl XSL_STYLE_DIR dnl AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [ glibcxx_docbook_url=http://cdn.docbook.org/release/xsl/current/ AC_MSG_CHECKING([for local stylesheet directory]) glibcxx_local_stylesheets=no if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null` then XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'` glibcxx_local_stylesheets=yes else for dir in \ /usr/share/sgml/docbook/xsl-ns-stylesheets \ /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \ /usr/share/xml/docbook/stylesheet/nwalsh5/current \ /usr/share/xml/docbook/stylesheet/nwalsh/current do if test -d $dir; then glibcxx_local_stylesheets=yes XSL_STYLE_DIR=$dir break fi done fi AC_MSG_RESULT($glibcxx_local_stylesheets) if test x"$glibcxx_local_stylesheets" = x"yes"; then AC_SUBST(XSL_STYLE_DIR) AC_MSG_NOTICE($XSL_STYLE_DIR) AC_MSG_CHECKING([for docbook stylesheets for documentation creation]) glibcxx_stylesheets=no if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then if test x${XSLTPROC} = xyes && echo '' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then glibcxx_stylesheets=yes fi fi AC_MSG_RESULT($glibcxx_stylesheets) else glibcxx_stylesheets=no fi # Check for epub3 dependencies. AC_MSG_CHECKING([for epub3 stylesheets for documentation creation]) glibcxx_epub_stylesheets=no if test x"$glibcxx_local_stylesheets" = x"yes"; then if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then glibcxx_epub_stylesheets=yes fi fi AC_MSG_RESULT($glibcxx_epub_stylesheets) AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes") ]) dnl dnl Set up *_INCLUDES variables for all sundry Makefile.am's. dnl dnl Substs: dnl GLIBCXX_INCLUDES dnl TOPLEVEL_INCLUDES dnl AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ # Used for every C++ compile we perform. GLIBCXX_INCLUDES="\ -I$glibcxx_builddir/include/$host_alias \ -I$glibcxx_builddir/include \ -I$glibcxx_srcdir/libsupc++" # For Canadian crosses, pick this up too. if test $CANADIAN = yes; then GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" fi # Stuff in the actual top level. Currently only used by libsupc++ to # get unwind* headers from the libgcc dir. #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include' TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc' # Now, export this to all the little Makefiles.... AC_SUBST(GLIBCXX_INCLUDES) AC_SUBST(TOPLEVEL_INCLUDES) ]) dnl dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) dnl dnl Substs: dnl CPPFLAGS dnl OPTIMIZE_CXXFLAGS dnl WARN_FLAGS dnl AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ AC_SUBST(CPPFLAGS) # Optimization flags that are probably a good idea for thrill-seekers. Just # uncomment the lines below and make, everything else is ready to go... # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host. # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc AC_SUBST(OPTIMIZE_CXXFLAGS) WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=19 -Wsystem-headers" AC_SUBST(WARN_FLAGS) ]) dnl dnl All installation directory information is determined here. dnl dnl Substs: dnl gxx_install_dir dnl glibcxx_prefixdir dnl glibcxx_toolexecdir dnl glibcxx_toolexeclibdir dnl dnl Assumes cross_compiling bits already done, and with_cross_host in dnl particular. dnl dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir. dnl config/gxx-include-dir.m4 must be kept consistant with this as well. AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ glibcxx_toolexecdir=no glibcxx_toolexeclibdir=no glibcxx_prefixdir=$prefix AC_MSG_CHECKING([for gxx-include-dir]) AC_ARG_WITH([gxx-include-dir], AC_HELP_STRING([--with-gxx-include-dir=DIR], [installation directory for include files]), [case "$withval" in yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; no) gxx_include_dir=no ;; *) gxx_include_dir=$withval ;; esac], [gxx_include_dir=no]) AC_MSG_RESULT($gxx_include_dir) AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) AC_ARG_ENABLE([version-specific-runtime-libs], AC_HELP_STRING([--enable-version-specific-runtime-libs], [Specify that runtime libraries should be installed in a compiler-specific directory]), [case "$enableval" in yes) version_specific_libs=yes ;; no) version_specific_libs=no ;; *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; esac], [version_specific_libs=no]) AC_MSG_RESULT($version_specific_libs) GCC_WITH_TOOLEXECLIBDIR # Default case for install directory for include files. if test $version_specific_libs = no && test $gxx_include_dir = no; then gxx_include_dir='include/c++/${gcc_version}' if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir" else gxx_include_dir='${prefix}/'"$gxx_include_dir" fi fi # Version-specific runtime libs processing. if test $version_specific_libs = yes; then # Need the gcc compiler version to know where to install libraries # and header files if --enable-version-specific-runtime-libs option # is selected. FIXME: these variables are misnamed, there are # no executables installed in _toolexecdir or _toolexeclibdir. if test x"$gxx_include_dir" = x"no"; then gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++' fi glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)' fi # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir # Install a library built with a cross compiler in tooldir, not libdir. if test x"$glibcxx_toolexecdir" = x"no"; then if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then glibcxx_toolexecdir='${exec_prefix}/${host_alias}' case ${with_toolexeclibdir} in no) glibcxx_toolexeclibdir='${toolexecdir}/lib' ;; *) glibcxx_toolexeclibdir=${with_toolexeclibdir} ;; esac else glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' glibcxx_toolexeclibdir='${libdir}' fi multi_os_directory=`$CXX -print-multi-os-directory` case $multi_os_directory in .) ;; # Avoid trailing /. *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; esac fi AC_MSG_CHECKING([for install location]) AC_MSG_RESULT($gxx_include_dir) AC_SUBST(glibcxx_prefixdir) AC_SUBST(gxx_include_dir) AC_SUBST(glibcxx_toolexecdir) AC_SUBST(glibcxx_toolexeclibdir) ]) dnl dnl GLIBCXX_ENABLE dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) dnl dnl See manual/appendix_porting.html#appendix.porting.build_hacking for dnl documentation. dnl m4_define([GLIBCXX_ENABLE],[dnl m4_define([_g_switch],[--enable-$1])dnl m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl AC_ARG_ENABLE([$1],m4_dquote(_g_help), m4_bmatch([$5], [^permit ], [[ case "$enableval" in m4_bpatsubst([$5],[permit ])) ;; *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; dnl Idea for future: generate a URL pointing to dnl "onlinedocs/configopts.html#whatever" esac ]], [^$], [[ case "$enableval" in yes|no) ;; *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; esac ]], [[$5]]), [enable_]m4_bpatsubst([$1],-,_)[=][$2]) m4_undefine([_g_switch])dnl m4_undefine([_g_help])dnl ]) dnl dnl Check for ISO/IEC 9899:1999 "C99" support. dnl dnl --enable-c99 defines _GLIBCXX_USE_C99 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] dnl Where DEFAULT is either `yes' or `no'. dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_C99], [ GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) if test x"$enable_c99" = x"yes"; then AC_LANG_SAVE AC_LANG_CPLUSPLUS # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__ # undefined may cause fake C99 facilities, like pre-standard snprintf, # to be spuriously enabled. ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -std=c++98" ac_save_LIBS="$LIBS" ac_save_gcc_no_link="$gcc_no_link" if test x$gcc_no_link != xyes; then # Use -fno-exceptions to that the C driver can link these tests without # hitting undefined references to personality routines. CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK gcc_no_link=yes ]) fi # Check for the existence of <math.h> functions used if C99 is enabled. AC_CACHE_CHECK([for ISO C99 support in <math.h> for C++98], glibcxx_cv_c99_math_cxx98, [ GCC_TRY_COMPILE_OR_LINK( [#include <math.h> volatile double d1, d2; volatile int i;], [i = fpclassify(d1); i = isfinite(d1); i = isinf(d1); i = isnan(d1); i = isnormal(d1); i = signbit(d1); i = isgreater(d1, d2); i = isgreaterequal(d1, d2); i = isless(d1, d2); i = islessequal(d1, d2); i = islessgreater(d1, d2); i = islessgreater(d1, d2); i = isunordered(d1, d2); ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no]) ]) if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1, [Define if C99 functions or macros in <math.h> should be imported in <cmath> in namespace std for C++98.]) fi # Check for the existence of <complex.h> complex math functions. # This is necessary even though libstdc++ uses the builtin versions # of these functions, because if the builtin cannot be used, a reference # to the library function is emitted. AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) if test x"$ac_has_complex_h" = x"yes"; then AC_CACHE_CHECK([for ISO C99 support in <complex.h> for C++98], glibcxx_cv_c99_complex_cxx98, [ GCC_TRY_COMPILE_OR_LINK( [#include <complex.h> typedef __complex__ float float_type; typedef __complex__ double double_type; typedef __complex__ long double ld_type; volatile float_type tmpf; volatile double_type tmpd; volatile ld_type tmpld; volatile float f; volatile double d; volatile long double ld;], [f = cabsf(tmpf); f = cargf(tmpf); tmpf = ccosf(tmpf); tmpf = ccoshf(tmpf); tmpf = cexpf(tmpf); tmpf = clogf(tmpf); tmpf = csinf(tmpf); tmpf = csinhf(tmpf); tmpf = csqrtf(tmpf); tmpf = ctanf(tmpf); tmpf = ctanhf(tmpf); tmpf = cpowf(tmpf, tmpf); tmpf = cprojf(tmpf); d = cabs(tmpd); d = carg(tmpd); tmpd = ccos(tmpd); tmpd = ccosh(tmpd); tmpd = cexp(tmpd); tmpd = clog(tmpd); tmpd = csin(tmpd); tmpd = csinh(tmpd); tmpd = csqrt(tmpd); tmpd = ctan(tmpd); tmpd = ctanh(tmpd); tmpd = cpow(tmpd, tmpd); tmpd = cproj(tmpd); ld = cabsl(tmpld); ld = cargl(tmpld); tmpld = ccosl(tmpld); tmpld = ccoshl(tmpld); tmpld = cexpl(tmpld); tmpld = clogl(tmpld); tmpld = csinl(tmpld); tmpld = csinhl(tmpld); tmpld = csqrtl(tmpld); tmpld = ctanl(tmpld); tmpld = ctanhl(tmpld); tmpld = cpowl(tmpld, tmpld); tmpld = cprojl(tmpld); ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no]) ]) fi if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1, [Define if C99 functions in <complex.h> should be used in <complex> for C++98. Using compiler builtins for these functions requires corresponding C99 library functions to be present.]) fi # Check for the existence in <stdio.h> of vscanf, et. al. AC_CACHE_CHECK([for ISO C99 support in <stdio.h> for C++98], glibcxx_cv_c99_stdio_cxx98, [ GCC_TRY_COMPILE_OR_LINK( [#include <stdio.h> #include <stdarg.h> void foo(char* fmt, ...) { va_list args; va_start(args, fmt); vfscanf(stderr, "%i", args); vscanf("%i", args); vsnprintf(fmt, 0, "%i", args); vsscanf(fmt, "%i", args); snprintf(fmt, 0, "%i", 1); }], [], [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no]) ]) if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1, [Define if C99 functions or macros in <stdio.h> should be imported in <cstdio> in namespace std for C++98.]) fi # Check for the existence in <stdlib.h> of lldiv_t, et. al. AC_CACHE_CHECK([for ISO C99 support in <stdlib.h> for C++98], glibcxx_cv_c99_stdlib_cxx98, [ GCC_TRY_COMPILE_OR_LINK( [#include <stdlib.h> volatile float f; volatile long double ld; volatile unsigned long long ll; lldiv_t mydivt;], [char* tmp; f = strtof("gnu", &tmp); ld = strtold("gnu", &tmp); ll = strtoll("gnu", &tmp, 10); ll = strtoull("gnu", &tmp, 10); ll = llabs(10); mydivt = lldiv(10,1); ll = mydivt.quot; ll = mydivt.rem; ll = atoll("10"); _Exit(0); ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no]) ]) if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1, [Define if C99 functions or macros in <stdlib.h> should be imported in <cstdlib> in namespace std for C++98.]) fi # Check for the existence in <wchar.h> of wcstold, etc. if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes; then AC_CACHE_CHECK([for ISO C99 support in <wchar.h> for C++98], glibcxx_cv_c99_wchar_cxx98, [ AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::wcstold; using ::wcstoll; using ::wcstoull; } ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no]) ]) # Checks for wide character functions that may not be present. # Injection of these is wrapped with guard macros. # NB: only put functions here, instead of immediately above, if # absolutely necessary. AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::vfwscanf; }], [], [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::vswscanf; }], [], [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::vwscanf; }], [], [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::wcstof; }], [], [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) AC_TRY_COMPILE([#include <wctype.h>], [wint_t t; int i = iswblank(t);], [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1, [Define if C99 functions or macros in <wchar.h> should be imported in <cwchar> in namespace std for C++98.]) fi fi # Option parsed, now set things appropriately. if test x"$glibcxx_cv_c99_math_cxx98" = x"no" || test x"$glibcxx_cv_c99_complex_cxx98" = x"no" || test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" || test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" || test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then enable_c99=no; else AC_DEFINE(_GLIBCXX_USE_C99, 1, [Define if C99 functions or macros from <wchar.h>, <math.h>, <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.]) fi gcc_no_link="$ac_save_gcc_no_link" LIBS="$ac_save_LIBS" CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE AC_LANG_SAVE AC_LANG_CPLUSPLUS # Use -std=c++11 and test again for C99 library feature in C++11 mode. # For the reasons given above we use -std=c++11 not -std=gnu++11. ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -std=c++11" ac_save_LIBS="$LIBS" ac_save_gcc_no_link="$gcc_no_link" if test x$gcc_no_link != xyes; then # Use -fno-exceptions to that the C driver can link these tests without # hitting undefined references to personality routines. CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK gcc_no_link=yes ]) fi # Check for the existence of <stdint.h> types. AC_CACHE_CHECK([for ISO C99 support in <stdint.h> for C++11], glibcxx_cv_c99_stdint, [ AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS #define __STDC_CONSTANT_MACROS #include <stdint.h>], [typedef int8_t my_int8_t; my_int8_t i8 = INT8_MIN; i8 = INT8_MAX; typedef int16_t my_int16_t; my_int16_t i16 = INT16_MIN; i16 = INT16_MAX; typedef int32_t my_int32_t; my_int32_t i32 = INT32_MIN; i32 = INT32_MAX; typedef int64_t my_int64_t; my_int64_t i64 = INT64_MIN; i64 = INT64_MAX; typedef int_fast8_t my_int_fast8_t; my_int_fast8_t if8 = INT_FAST8_MIN; if8 = INT_FAST8_MAX; typedef int_fast16_t my_int_fast16_t; my_int_fast16_t if16 = INT_FAST16_MIN; if16 = INT_FAST16_MAX; typedef int_fast32_t my_int_fast32_t; my_int_fast32_t if32 = INT_FAST32_MIN; if32 = INT_FAST32_MAX; typedef int_fast64_t my_int_fast64_t; my_int_fast64_t if64 = INT_FAST64_MIN; if64 = INT_FAST64_MAX; typedef int_least8_t my_int_least8_t; my_int_least8_t il8 = INT_LEAST8_MIN; il8 = INT_LEAST8_MAX; typedef int_least16_t my_int_least16_t; my_int_least16_t il16 = INT_LEAST16_MIN; il16 = INT_LEAST16_MAX; typedef int_least32_t my_int_least32_t; my_int_least32_t il32 = INT_LEAST32_MIN; il32 = INT_LEAST32_MAX; typedef int_least64_t my_int_least64_t; my_int_least64_t il64 = INT_LEAST64_MIN; il64 = INT_LEAST64_MAX; typedef intmax_t my_intmax_t; my_intmax_t im = INTMAX_MAX; im = INTMAX_MIN; typedef intptr_t my_intptr_t; my_intptr_t ip = INTPTR_MAX; ip = INTPTR_MIN; typedef uint8_t my_uint8_t; my_uint8_t ui8 = UINT8_MAX; ui8 = UINT8_MAX; typedef uint16_t my_uint16_t; my_uint16_t ui16 = UINT16_MAX; ui16 = UINT16_MAX; typedef uint32_t my_uint32_t; my_uint32_t ui32 = UINT32_MAX; ui32 = UINT32_MAX; typedef uint64_t my_uint64_t; my_uint64_t ui64 = UINT64_MAX; ui64 = UINT64_MAX; typedef uint_fast8_t my_uint_fast8_t; my_uint_fast8_t uif8 = UINT_FAST8_MAX; uif8 = UINT_FAST8_MAX; typedef uint_fast16_t my_uint_fast16_t; my_uint_fast16_t uif16 = UINT_FAST16_MAX; uif16 = UINT_FAST16_MAX; typedef uint_fast32_t my_uint_fast32_t; my_uint_fast32_t uif32 = UINT_FAST32_MAX; uif32 = UINT_FAST32_MAX; typedef uint_fast64_t my_uint_fast64_t; my_uint_fast64_t uif64 = UINT_FAST64_MAX; uif64 = UINT_FAST64_MAX; typedef uint_least8_t my_uint_least8_t; my_uint_least8_t uil8 = UINT_LEAST8_MAX; uil8 = UINT_LEAST8_MAX; typedef uint_least16_t my_uint_least16_t; my_uint_least16_t uil16 = UINT_LEAST16_MAX; uil16 = UINT_LEAST16_MAX; typedef uint_least32_t my_uint_least32_t; my_uint_least32_t uil32 = UINT_LEAST32_MAX; uil32 = UINT_LEAST32_MAX; typedef uint_least64_t my_uint_least64_t; my_uint_least64_t uil64 = UINT_LEAST64_MAX; uil64 = UINT_LEAST64_MAX; typedef uintmax_t my_uintmax_t; my_uintmax_t uim = UINTMAX_MAX; uim = UINTMAX_MAX; typedef uintptr_t my_uintptr_t; my_uintptr_t uip = UINTPTR_MAX; uip = UINTPTR_MAX; ],[glibcxx_cv_c99_stdint=yes], [glibcxx_cv_c99_stdint=no]) ]) if test x"$glibcxx_cv_c99_stdint" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_STDINT, 1, [Define if C99 types in <stdint.h> should be imported in <cstdint> in namespace std for C++11.]) fi # Check for the existence of <inttypes.h> functions (NB: doesn't make # sense if the glibcxx_cv_c99_stdint check fails, per C99, 7.8/1). ac_c99_inttypes=no; if test x"$glibcxx_cv_c99_stdint" = x"yes"; then AC_MSG_CHECKING([for ISO C99 support for C++11 in <inttypes.h>]) AC_TRY_COMPILE([#include <inttypes.h>], [intmax_t i, numer, denom, base; const char* s; char** endptr; intmax_t ret = imaxabs(i); imaxdiv_t dret = imaxdiv(numer, denom); ret = strtoimax(s, endptr, base); uintmax_t uret = strtoumax(s, endptr, base); ],[ac_c99_inttypes=yes], [ac_c99_inttypes=no]) AC_MSG_RESULT($ac_c99_inttypes) fi if test x"$ac_c99_inttypes" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES, 1, [Define if C99 functions in <inttypes.h> should be imported in <cinttypes> in namespace std in C++11.]) fi # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't # make sense if the glibcxx_cv_c99_stdint check fails, per C99, 7.8/1). ac_c99_inttypes_wchar_t=no; if test x"$glibcxx_cv_c99_stdint" = x"yes"; then AC_MSG_CHECKING([for wchar_t ISO C99 support for C++11 in <inttypes.h>]) AC_TRY_COMPILE([#include <inttypes.h>], [intmax_t base; const wchar_t* s; wchar_t** endptr; intmax_t ret = wcstoimax(s, endptr, base); uintmax_t uret = wcstoumax(s, endptr, base); ],[ac_c99_inttypes_wchar_t=yes], [ac_c99_inttypes_wchar_t=no]) AC_MSG_RESULT($ac_c99_inttypes_wchar_t) fi if test x"$ac_c99_inttypes_wchar_t" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T, 1, [Define if wchar_t C99 functions in <inttypes.h> should be imported in <cinttypes> in namespace std in C++11.]) fi # Check for the existence of <math.h> generic macros used if C99 is enabled. AC_CACHE_CHECK([for ISO C99 generic macro support in <math.h> for C++11], glibcxx_cv_c99_math_cxx11, [ GCC_TRY_COMPILE_OR_LINK( [#include <math.h> volatile double d1, d2; volatile int i;], [i = fpclassify(d1); i = isfinite(d1); i = isinf(d1); i = isnan(d1); i = isnormal(d1); i = signbit(d1); i = isgreater(d1, d2); i = isgreaterequal(d1, d2); i = isless(d1, d2); i = islessequal(d1, d2); i = islessgreater(d1, d2); i = islessgreater(d1, d2); i = isunordered(d1, d2); ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no]) ]) if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1, [Define if C99 generic macros in <math.h> should be imported in <cmath> in namespace std for C++11.]) fi # Check for the existence of <math.h> typedefs. AC_CACHE_CHECK([for ISO C99 float types for C++11 in <math.h>], glibcxx_cv_c99_flt_eval_types, [ AC_TRY_COMPILE([#include <math.h>], [// Types typedef double_t my_double_t; typedef float_t my_float_t; ], [glibcxx_cv_c99_flt_eval_types=yes], [glibcxx_cv_c99_flt_eval_types=no]) ]) if test x"$glibcxx_cv_c99_flt_eval_types" = x"yes"; then AC_DEFINE(HAVE_C99_FLT_EVAL_TYPES, 1, [Define if C99 float_t and double_t in <math.h> should be imported in <cmath> in namespace std for C++11.]) fi # Check for the existence of <math.h> functions. AC_CACHE_CHECK([for ISO C99 function support for C++11 in <math.h>], glibcxx_cv_c99_math_funcs, [ AC_TRY_COMPILE([#include <math.h>], [ // Hyperbolic acosh(0.0); acoshf(0.0f); acoshl(0.0l); asinh(0.0); asinhf(0.0f); asinhl(0.0l); atanh(0.0); atanhf(0.0f); atanhl(0.0l); // Exponential and logarithmic exp2(0.0); exp2f(0.0f); exp2l(0.0l); expm1(0.0); expm1f(0.0f); expm1l(0.0l); ilogb(0.0); ilogbf(0.0f); ilogbl(0.0l); log1p(0.0); log1pf(0.0f); log1pl(0.0l); log2(0.0); log2f(0.0f); log2l(0.0l); logb(0.0); logbf(0.0f); logbl(0.0l); scalbln(0.0, 0l); scalblnf(0.0f, 0l); scalblnl(0.0l, 0l); scalbn(0.0, 0); scalbnf(0.0f, 0); scalbnl(0.0l, 0); // Power and absolute-value cbrt(0.0); cbrtf(0.0f); cbrtl(0.0l); hypot(0.0, 0.0); hypotf(0.0f, 0.0f); hypotl(0.0l, 0.0l); // Error and gamma erf(0.0); erff(0.0f); erfl(0.0l); erfc(0.0); erfcf(0.0f); erfcl(0.0l); lgamma(0.0); lgammaf(0.0f); lgammal(0.0l); tgamma(0.0); tgammaf(0.0f); tgammal(0.0l); // Nearest integer nearbyint(0.0); nearbyintf(0.0f); nearbyintl(0.0l); rint(0.0); rintf(0.0f); rintl(0.0l); round(0.0); roundf(0.0f); roundl(0.0l); lrint(0.0); lrintf(0.0f); lrintl(0.0l); lround(0.0); lroundf(0.0f); lroundl(0.0l); #ifndef __APPLE__ /* see below */ llrint(0.0); llrintf(0.0f); llrintl(0.0l); llround(0.0); llroundf(0.0f); llroundl(0.0l); #endif trunc(0.0); truncf(0.0f); truncl(0.0l); // Remainder remainder(0.0, 0.0); remainderf(0.0f, 0.0f); remainderl(0.0l, 0.0l); remquo(0.0, 0.0, 0); remquof(0.0f, 0.0f, 0); remquol(0.0l, 0.0l, 0); // Manipulation copysign(0.0, 0.0); copysignf(0.0f, 0.0f); copysignl(0.0l, 0.0l); nan(""); nanf(""); nanl(""); nextafter(0.0, 0.0); nextafterf(0.0f, 0.0f); nextafterl(0.0l, 0.0l); nexttoward(0.0, 0.0); nexttowardf(0.0f, 0.0f); nexttowardl(0.0l, 0.0l); // Max, min, positive difference fdim(0.0, 0.0); fdimf(0.0f, 0.0f); fdiml(0.0l, 0.0l); fmax(0.0, 0.0); fmaxf(0.0f, 0.0f); fmaxl(0.0l, 0.0l); fmin(0.0, 0.0); fminf(0.0f, 0.0f); fminl(0.0l, 0.0l); // FP Multiply-add fma(0.0, 0.0, 0.0); fmaf(0.0f, 0.0f, 0.0f); fmal(0.0l, 0.0l, 0.0l); ], [glibcxx_cv_c99_math_funcs=yes], [glibcxx_cv_c99_math_funcs=no]) ]) if test x"$glibcxx_cv_c99_math_funcs" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_MATH_FUNCS, 1, [Define if C99 functions in <math.h> should be imported in <cmath> in namespace std for C++11.]) case "${target_os}" in darwin*) AC_CACHE_CHECK([for ISO C99 rounding functions in <math.h>], glibcxx_cv_c99_math_llround, [ AC_TRY_COMPILE([#include <math.h>], [llrint(0.0); llrintf(0.0f); llrintl(0.0l); llround(0.0); llroundf(0.0f); llroundl(0.0l); ], [glibcxx_cv_c99_math_llround=yes], [glibcxx_cv_c99_math_llround=no]) ]) ;; esac if test x"$glibcxx_cv_c99_math_llround" = x"no"; then AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1, [Define if C99 llrint and llround functions are missing from <math.h>.]) fi fi # Check for the existence of <complex.h> complex math functions. # This is necessary even though libstdc++ uses the builtin versions # of these functions, because if the builtin cannot be used, a reference # to the library function is emitted. AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) if test x"$ac_has_complex_h" = x"yes"; then AC_CACHE_CHECK([for ISO C99 support in <complex.h> for C++11], glibcxx_cv_c99_complex_cxx11, [ GCC_TRY_COMPILE_OR_LINK( [#include <complex.h> typedef __complex__ float float_type; typedef __complex__ double double_type; typedef __complex__ long double ld_type; volatile float_type tmpf; volatile double_type tmpd; volatile ld_type tmpld; volatile float f; volatile double d; volatile long double ld;], [f = cabsf(tmpf); f = cargf(tmpf); tmpf = ccosf(tmpf); tmpf = ccoshf(tmpf); tmpf = cexpf(tmpf); tmpf = clogf(tmpf); tmpf = csinf(tmpf); tmpf = csinhf(tmpf); tmpf = csqrtf(tmpf); tmpf = ctanf(tmpf); tmpf = ctanhf(tmpf); tmpf = cpowf(tmpf, tmpf); tmpf = cprojf(tmpf); d = cabs(tmpd); d = carg(tmpd); tmpd = ccos(tmpd); tmpd = ccosh(tmpd); tmpd = cexp(tmpd); tmpd = clog(tmpd); tmpd = csin(tmpd); tmpd = csinh(tmpd); tmpd = csqrt(tmpd); tmpd = ctan(tmpd); tmpd = ctanh(tmpd); tmpd = cpow(tmpd, tmpd); tmpd = cproj(tmpd); ld = cabsl(tmpld); ld = cargl(tmpld); tmpld = ccosl(tmpld); tmpld = ccoshl(tmpld); tmpld = cexpl(tmpld); tmpld = clogl(tmpld); tmpld = csinl(tmpld); tmpld = csinhl(tmpld); tmpld = csqrtl(tmpld); tmpld = ctanl(tmpld); tmpld = ctanhl(tmpld); tmpld = cpowl(tmpld, tmpld); tmpld = cprojl(tmpld); ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no]) ]) fi if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1, [Define if C99 functions in <complex.h> should be used in <complex> for C++11. Using compiler builtins for these functions requires corresponding C99 library functions to be present.]) fi # Check for the existence of <complex.h> complex inverse trigonometric # math functions used by <complex> for C++11 and later. ac_c99_complex_arc=no; if test x"$ac_has_complex_h" = x"yes"; then AC_MSG_CHECKING([for ISO C99 support for inverse trig functions in <complex.h>]) AC_TRY_COMPILE([#include <complex.h>], [typedef __complex__ float float_type; float_type tmpf; cacosf(tmpf); casinf(tmpf); catanf(tmpf); cacoshf(tmpf); casinhf(tmpf); catanhf(tmpf); typedef __complex__ double double_type; double_type tmpd; cacos(tmpd); casin(tmpd); catan(tmpd); cacosh(tmpd); casinh(tmpd); catanh(tmpd); typedef __complex__ long double ld_type; ld_type tmpld; cacosl(tmpld); casinl(tmpld); catanl(tmpld); cacoshl(tmpld); casinhl(tmpld); catanhl(tmpld); ],[ac_c99_complex_arc=yes], [ac_c99_complex_arc=no]) fi AC_MSG_RESULT($ac_c99_complex_arc) if test x"$ac_c99_complex_arc" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_ARC, 1, [Define if C99 inverse trig functions in <complex.h> should be used in <complex>. Using compiler builtins for these functions requires corresponding C99 library functions to be present.]) fi # Check for the existence in <stdio.h> of vscanf, et. al. AC_CACHE_CHECK([for ISO C99 support in <stdio.h> for C++11], glibcxx_cv_c99_stdio_cxx11, [ GCC_TRY_COMPILE_OR_LINK( [#include <stdio.h> #include <stdarg.h> void foo(char* fmt, ...) { va_list args; va_start(args, fmt); vfscanf(stderr, "%i", args); vscanf("%i", args); vsnprintf(fmt, 0, "%i", args); vsscanf(fmt, "%i", args); snprintf(fmt, 0, "%i", 1); }], [], [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no]) ]) if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1, [Define if C99 functions or macros in <stdio.h> should be imported in <cstdio> in namespace std for C++11.]) fi # Check for the existence in <stdlib.h> of lldiv_t, et. al. AC_CACHE_CHECK([for ISO C99 support in <stdlib.h> for C++11], glibcxx_cv_c99_stdlib_cxx11, [ GCC_TRY_COMPILE_OR_LINK( [#include <stdlib.h> volatile float f; volatile long double ld; volatile unsigned long long ll; lldiv_t mydivt;], [char* tmp; f = strtof("gnu", &tmp); ld = strtold("gnu", &tmp); ll = strtoll("gnu", &tmp, 10); ll = strtoull("gnu", &tmp, 10); ll = llabs(10); mydivt = lldiv(10,1); ll = mydivt.quot; ll = mydivt.rem; ll = atoll("10"); _Exit(0); ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no]) ]) if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1, [Define if C99 functions or macros in <stdlib.h> should be imported in <cstdlib> in namespace std for C++11.]) fi # Check for the existence in <wchar.h> of wcstold, etc. if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes; then AC_CACHE_CHECK([for ISO C99 support in <wchar.h> for C++11], glibcxx_cv_c99_wchar_cxx11, [ AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::wcstold; using ::wcstoll; using ::wcstoull; } ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no]) ]) # Checks for wide character functions that may not be present. # Injection of these is wrapped with guard macros. # NB: only put functions here, instead of immediately above, if # absolutely necessary. AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::vfwscanf; }], [], [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::vswscanf; }], [], [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::vwscanf; }], [], [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) AC_TRY_COMPILE([#include <wchar.h> namespace test { using ::wcstof; }], [], [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) AC_TRY_COMPILE([#include <wctype.h>], [wint_t t; int i = iswblank(t);], [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1, [Define if C99 functions or macros in <wchar.h> should be imported in <cwchar> in namespace std for C++11.]) fi fi # Check for the existence of <ctype.h> functions. AC_CACHE_CHECK([for ISO C99 support for C++11 in <ctype.h>], glibcxx_cv_c99_ctype, [ AC_TRY_COMPILE([#include <ctype.h>], [int ch; int ret; ret = isblank(ch); ],[glibcxx_cv_c99_ctype=yes], [glibcxx_cv_c99_ctype=no]) ]) if test x"$glibcxx_cv_c99_ctype" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_CTYPE, 1, [Define if C99 functions in <ctype.h> should be imported in <cctype> in namespace std for C++11.]) fi # Check for the existence of <fenv.h> functions. AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) ac_c99_fenv=no; if test x"$ac_has_fenv_h" = x"yes"; then AC_MSG_CHECKING([for ISO C99 support for C++11 in <fenv.h>]) AC_TRY_COMPILE([#include <fenv.h>], [int except, mode; fexcept_t* pflag; fenv_t* penv; int ret; ret = feclearexcept(except); ret = fegetexceptflag(pflag, except); ret = feraiseexcept(except); ret = fesetexceptflag(pflag, except); ret = fetestexcept(except); ret = fegetround(); ret = fesetround(mode); ret = fegetenv(penv); ret = feholdexcept(penv); ret = fesetenv(penv); ret = feupdateenv(penv); ],[ac_c99_fenv=yes], [ac_c99_fenv=no]) AC_MSG_RESULT($ac_c99_fenv) fi if test x"$ac_c99_fenv" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_FENV, 1, [Define if C99 functions in <fenv.h> should be imported in <cfenv> in namespace std for C++11.]) fi gcc_no_link="$ac_save_gcc_no_link" LIBS="$ac_save_LIBS" CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE fi AC_MSG_CHECKING([for fully enabled ISO C99 support]) AC_MSG_RESULT($enable_c99) ]) dnl dnl Check for clock_gettime, nanosleep and sched_yield, used in the dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this] dnl in the C++11 standard. dnl dnl --enable-libstdcxx-time dnl --enable-libstdcxx-time=yes dnl checks for the availability of monotonic and realtime clocks, dnl nanosleep and sched_yield in libc. dnl --enable-libstdcxx-time=rt dnl also searches (and, if needed, links) librt. Note that this is dnl not always desirable because, in glibc 2.16 and earlier, for dnl example, in turn it triggers the linking of libpthread too, dnl which activates locking, dnl a large overhead for single-thread programs. dnl --enable-libstdcxx-time=no dnl --disable-libstdcxx-time dnl disables the checks completely dnl dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD. dnl AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]], [use KIND for check type], [permit yes|no|rt]) AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" ac_save_LIBS="$LIBS" ac_has_clock_monotonic=no ac_has_clock_realtime=no ac_has_nanosleep=no ac_has_sched_yield=no if test x"$enable_libstdcxx_time" = x"auto"; then case "${target_os}" in cygwin*) ac_has_nanosleep=yes ;; mingw*) ac_has_win32_sleep=yes ac_has_sched_yield=yes ;; darwin*) ac_has_nanosleep=yes ac_has_sched_yield=yes ;; # VxWorks has nanosleep as soon as the kernel is configured with # INCLUDE_POSIX_TIMERS, which is normally/most-often the case. vxworks*) ac_has_nanosleep=yes ;; gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) # Don't use link test for freestanding library, in case gcc_no_link=yes if test x"$is_hosted" = xyes; then # Versions of glibc before 2.17 needed -lrt for clock_gettime. AC_SEARCH_LIBS(clock_gettime, [rt]) if test x"$ac_cv_search_clock_gettime" = x"none required"; then ac_has_clock_monotonic=yes ac_has_clock_realtime=yes fi fi ac_has_nanosleep=yes ac_has_sched_yield=yes ;; freebsd*|netbsd*|dragonfly*|rtems*) ac_has_clock_monotonic=yes ac_has_clock_realtime=yes ac_has_nanosleep=yes ac_has_sched_yield=yes ;; openbsd*) ac_has_clock_monotonic=yes ac_has_clock_realtime=yes ac_has_nanosleep=yes ;; solaris*) ac_has_clock_monotonic=yes ac_has_clock_realtime=yes ac_has_nanosleep=yes ac_has_sched_yield=yes ;; uclinux*) ac_has_nanosleep=yes ac_has_sched_yield=yes esac elif test x"$enable_libstdcxx_time" != x"no"; then if test x"$enable_libstdcxx_time" = x"rt"; then AC_SEARCH_LIBS(clock_gettime, [rt]) AC_SEARCH_LIBS(nanosleep, [rt]) else AC_CHECK_FUNC(clock_gettime) AC_CHECK_FUNC(nanosleep) fi case "$ac_cv_search_clock_gettime" in -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime ;; esac case "$ac_cv_search_nanosleep" in -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep" ;; esac AC_SEARCH_LIBS(sched_yield, [rt]) case "$ac_cv_search_sched_yield" in -lrt*) if test x"$enable_libstdcxx_time" = x"rt"; then GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" ac_has_sched_yield=yes fi ;; *) ac_has_sched_yield=yes ;; esac AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no) if test x"$ac_has_unistd_h" = x"yes"; then AC_MSG_CHECKING([for monotonic clock]) AC_TRY_LINK( [#include <unistd.h> #include <time.h> ], [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) timespec tp; #endif clock_gettime(CLOCK_MONOTONIC, &tp); ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) AC_MSG_RESULT($ac_has_clock_monotonic) AC_MSG_CHECKING([for realtime clock]) AC_TRY_LINK( [#include <unistd.h> #include <time.h> ], [#if _POSIX_TIMERS > 0 timespec tp; #endif clock_gettime(CLOCK_REALTIME, &tp); ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) AC_MSG_RESULT($ac_has_clock_realtime) AC_MSG_CHECKING([for nanosleep]) AC_TRY_LINK( [#include <unistd.h> #include <time.h> ], [#if _POSIX_TIMERS > 0 timespec tp; #endif nanosleep(&tp, 0); ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) AC_MSG_RESULT($ac_has_nanosleep) fi fi if test x"$ac_has_clock_monotonic" != x"yes"; then case ${target_os} in linux* | uclinux*) AC_MSG_CHECKING([for clock_gettime syscall]) AC_TRY_COMPILE( [#include <unistd.h> #include <time.h> #include <sys/syscall.h> ], [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) timespec tp; #endif syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); ], [ac_has_clock_gettime_syscall=yes], [ac_has_clock_gettime_syscall=no]) AC_MSG_RESULT($ac_has_clock_gettime_syscall) if test x"$ac_has_clock_gettime_syscall" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1, [Defined if clock_gettime syscall has monotonic and realtime clock support. ]) ac_has_clock_monotonic=yes ac_has_clock_realtime=yes AC_MSG_CHECKING([for struct timespec that matches syscall]) AC_TRY_COMPILE( [#include <time.h> #include <sys/syscall.h> ], [#ifdef SYS_clock_gettime64 #if SYS_clock_gettime64 != SYS_clock_gettime // We need to use SYS_clock_gettime and libc appears to // also know about the SYS_clock_gettime64 syscall. // Check that userspace doesn't use time64 version of timespec. static_assert(sizeof(timespec::tv_sec) == sizeof(long), "struct timespec must be compatible with SYS_clock_gettime"); #endif #endif ], [ac_timespec_matches_syscall=yes], [ac_timespec_matches_syscall=no]) AC_MSG_RESULT($ac_timespec_matches_syscall) if test x"$ac_timespec_matches_syscall" = no; then AC_MSG_ERROR([struct timespec is not compatible with SYS_clock_gettime, please report a bug to http://gcc.gnu.org/bugzilla]) fi fi;; esac fi if test x"$ac_has_clock_monotonic" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1, [ Defined if clock_gettime has monotonic clock support. ]) fi if test x"$ac_has_clock_realtime" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1, [ Defined if clock_gettime has realtime clock support. ]) fi if test x"$ac_has_sched_yield" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, [ Defined if sched_yield is available. ]) fi if test x"$ac_has_nanosleep" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1, [ Defined if nanosleep is available. ]) elif test x"$ac_has_win32_sleep" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_WIN32_SLEEP, 1, [Defined if Sleep exists.]) else AC_MSG_CHECKING([for sleep]) AC_TRY_COMPILE([#include <unistd.h>], [sleep(1)], [ac_has_sleep=yes],[ac_has_sleep=no]) if test x"$ac_has_sleep" = x"yes"; then AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.]) fi AC_MSG_RESULT($ac_has_sleep) AC_MSG_CHECKING([for usleep]) AC_TRY_COMPILE([#include <unistd.h>], [sleep(1); usleep(100);], [ac_has_usleep=yes],[ac_has_usleep=no]) if test x"$ac_has_usleep" = x"yes"; then AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.]) fi AC_MSG_RESULT($ac_has_usleep) fi if test x"$ac_has_nanosleep$ac_has_win32_sleep$ac_has_sleep" = x"nonono"; then AC_DEFINE(_GLIBCXX_NO_SLEEP,1, [Defined if no way to sleep is available.]) fi AC_SUBST(GLIBCXX_LIBS) CXXFLAGS="$ac_save_CXXFLAGS" LIBS="$ac_save_LIBS" AC_LANG_RESTORE ]) dnl dnl Check for gettimeofday, used in the implementation of 20.11.7 dnl [time.clock] in the C++11 standard. dnl AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [ AC_MSG_CHECKING([for gettimeofday]) AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" ac_has_gettimeofday=no; AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no) if test x"$ac_has_sys_time_h" = x"yes"; then AC_MSG_CHECKING([for gettimeofday]) GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>], [timeval tv; gettimeofday(&tv, 0);], [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no]) AC_MSG_RESULT($ac_has_gettimeofday) fi if test x"$ac_has_gettimeofday" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1, [ Defined if gettimeofday is available. ]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1" dnl facilities in Chapter 8, "C compatibility". dnl AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS # Use -std=c++98 because -std=gnu++98 leaves __STRICT_ANSI__ # undefined and fake C99 facilities may be spuriously enabled. ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -std=c++98" # Check for the existence of <complex.h> complex math functions used # by tr1/complex. AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) ac_c99_complex_tr1=no; if test x"$ac_has_complex_h" = x"yes"; then AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>]) AC_TRY_COMPILE([#include <complex.h>], [typedef __complex__ float float_type; float_type tmpf; cacosf(tmpf); casinf(tmpf); catanf(tmpf); cacoshf(tmpf); casinhf(tmpf); catanhf(tmpf); typedef __complex__ double double_type; double_type tmpd; cacos(tmpd); casin(tmpd); catan(tmpd); cacosh(tmpd); casinh(tmpd); catanh(tmpd); typedef __complex__ long double ld_type; ld_type tmpld; cacosl(tmpld); casinl(tmpld); catanl(tmpld); cacoshl(tmpld); casinhl(tmpld); catanhl(tmpld); ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no]) fi AC_MSG_RESULT($ac_c99_complex_tr1) if test x"$ac_c99_complex_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1, [Define if C99 functions in <complex.h> should be used in <tr1/complex>. Using compiler builtins for these functions requires corresponding C99 library functions to be present.]) fi # Check for the existence of <ctype.h> functions. AC_CACHE_CHECK([for ISO C99 support to TR1 in <ctype.h>], glibcxx_cv_c99_ctype_tr1, [ AC_TRY_COMPILE([#include <ctype.h>], [int ch; int ret; ret = isblank(ch); ],[glibcxx_cv_c99_ctype_tr1=yes], [glibcxx_cv_c99_ctype_tr1=no]) ]) if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1, [Define if C99 functions in <ctype.h> should be imported in <tr1/cctype> in namespace std::tr1.]) fi # Check for the existence of <fenv.h> functions. AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) ac_c99_fenv_tr1=no; if test x"$ac_has_fenv_h" = x"yes"; then AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>]) AC_TRY_COMPILE([#include <fenv.h>], [int except, mode; fexcept_t* pflag; fenv_t* penv; int ret; ret = feclearexcept(except); ret = fegetexceptflag(pflag, except); ret = feraiseexcept(except); ret = fesetexceptflag(pflag, except); ret = fetestexcept(except); ret = fegetround(); ret = fesetround(mode); ret = fegetenv(penv); ret = feholdexcept(penv); ret = fesetenv(penv); ret = feupdateenv(penv); ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no]) AC_MSG_RESULT($ac_c99_fenv_tr1) fi if test x"$ac_c99_fenv_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1, [Define if C99 functions in <fenv.h> should be imported in <tr1/cfenv> in namespace std::tr1.]) fi # Check for the existence of <stdint.h> types. AC_CACHE_CHECK([for ISO C99 support to TR1 in <stdint.h>], glibcxx_cv_c99_stdint_tr1, [ AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS #define __STDC_CONSTANT_MACROS #include <stdint.h>], [typedef int8_t my_int8_t; my_int8_t i8 = INT8_MIN; i8 = INT8_MAX; typedef int16_t my_int16_t; my_int16_t i16 = INT16_MIN; i16 = INT16_MAX; typedef int32_t my_int32_t; my_int32_t i32 = INT32_MIN; i32 = INT32_MAX; typedef int64_t my_int64_t; my_int64_t i64 = INT64_MIN; i64 = INT64_MAX; typedef int_fast8_t my_int_fast8_t; my_int_fast8_t if8 = INT_FAST8_MIN; if8 = INT_FAST8_MAX; typedef int_fast16_t my_int_fast16_t; my_int_fast16_t if16 = INT_FAST16_MIN; if16 = INT_FAST16_MAX; typedef int_fast32_t my_int_fast32_t; my_int_fast32_t if32 = INT_FAST32_MIN; if32 = INT_FAST32_MAX; typedef int_fast64_t my_int_fast64_t; my_int_fast64_t if64 = INT_FAST64_MIN; if64 = INT_FAST64_MAX; typedef int_least8_t my_int_least8_t; my_int_least8_t il8 = INT_LEAST8_MIN; il8 = INT_LEAST8_MAX; typedef int_least16_t my_int_least16_t; my_int_least16_t il16 = INT_LEAST16_MIN; il16 = INT_LEAST16_MAX; typedef int_least32_t my_int_least32_t; my_int_least32_t il32 = INT_LEAST32_MIN; il32 = INT_LEAST32_MAX; typedef int_least64_t my_int_least64_t; my_int_least64_t il64 = INT_LEAST64_MIN; il64 = INT_LEAST64_MAX; typedef intmax_t my_intmax_t; my_intmax_t im = INTMAX_MAX; im = INTMAX_MIN; typedef intptr_t my_intptr_t; my_intptr_t ip = INTPTR_MAX; ip = INTPTR_MIN; typedef uint8_t my_uint8_t; my_uint8_t ui8 = UINT8_MAX; ui8 = UINT8_MAX; typedef uint16_t my_uint16_t; my_uint16_t ui16 = UINT16_MAX; ui16 = UINT16_MAX; typedef uint32_t my_uint32_t; my_uint32_t ui32 = UINT32_MAX; ui32 = UINT32_MAX; typedef uint64_t my_uint64_t; my_uint64_t ui64 = UINT64_MAX; ui64 = UINT64_MAX; typedef uint_fast8_t my_uint_fast8_t; my_uint_fast8_t uif8 = UINT_FAST8_MAX; uif8 = UINT_FAST8_MAX; typedef uint_fast16_t my_uint_fast16_t; my_uint_fast16_t uif16 = UINT_FAST16_MAX; uif16 = UINT_FAST16_MAX; typedef uint_fast32_t my_uint_fast32_t; my_uint_fast32_t uif32 = UINT_FAST32_MAX; uif32 = UINT_FAST32_MAX; typedef uint_fast64_t my_uint_fast64_t; my_uint_fast64_t uif64 = UINT_FAST64_MAX; uif64 = UINT_FAST64_MAX; typedef uint_least8_t my_uint_least8_t; my_uint_least8_t uil8 = UINT_LEAST8_MAX; uil8 = UINT_LEAST8_MAX; typedef uint_least16_t my_uint_least16_t; my_uint_least16_t uil16 = UINT_LEAST16_MAX; uil16 = UINT_LEAST16_MAX; typedef uint_least32_t my_uint_least32_t; my_uint_least32_t uil32 = UINT_LEAST32_MAX; uil32 = UINT_LEAST32_MAX; typedef uint_least64_t my_uint_least64_t; my_uint_least64_t uil64 = UINT_LEAST64_MAX; uil64 = UINT_LEAST64_MAX; typedef uintmax_t my_uintmax_t; my_uintmax_t uim = UINTMAX_MAX; uim = UINTMAX_MAX; typedef uintptr_t my_uintptr_t; my_uintptr_t uip = UINTPTR_MAX; uip = UINTPTR_MAX; ],[glibcxx_cv_c99_stdint_tr1=yes], [glibcxx_cv_c99_stdint_tr1=no]) ]) if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1, [Define if C99 types in <stdint.h> should be imported in <tr1/cstdint> in namespace std::tr1.]) fi # Check for the existence of <math.h> functions. AC_CACHE_CHECK([for ISO C99 support to TR1 in <math.h>], glibcxx_cv_c99_math_tr1, [ AC_TRY_COMPILE([#include <math.h>], [typedef double_t my_double_t; typedef float_t my_float_t; acosh(0.0); acoshf(0.0f); acoshl(0.0l); asinh(0.0); asinhf(0.0f); asinhl(0.0l); atanh(0.0); atanhf(0.0f); atanhl(0.0l); cbrt(0.0); cbrtf(0.0f); cbrtl(0.0l); copysign(0.0, 0.0); copysignf(0.0f, 0.0f); copysignl(0.0l, 0.0l); erf(0.0); erff(0.0f); erfl(0.0l); erfc(0.0); erfcf(0.0f); erfcl(0.0l); exp2(0.0); exp2f(0.0f); exp2l(0.0l); expm1(0.0); expm1f(0.0f); expm1l(0.0l); fdim(0.0, 0.0); fdimf(0.0f, 0.0f); fdiml(0.0l, 0.0l); fma(0.0, 0.0, 0.0); fmaf(0.0f, 0.0f, 0.0f); fmal(0.0l, 0.0l, 0.0l); fmax(0.0, 0.0); fmaxf(0.0f, 0.0f); fmaxl(0.0l, 0.0l); fmin(0.0, 0.0); fminf(0.0f, 0.0f); fminl(0.0l, 0.0l); hypot(0.0, 0.0); hypotf(0.0f, 0.0f); hypotl(0.0l, 0.0l); ilogb(0.0); ilogbf(0.0f); ilogbl(0.0l); lgamma(0.0); lgammaf(0.0f); lgammal(0.0l); #ifndef __APPLE__ /* see below */ llrint(0.0); llrintf(0.0f); llrintl(0.0l); llround(0.0); llroundf(0.0f); llroundl(0.0l); #endif log1p(0.0); log1pf(0.0f); log1pl(0.0l); log2(0.0); log2f(0.0f); log2l(0.0l); logb(0.0); logbf(0.0f); logbl(0.0l); lrint(0.0); lrintf(0.0f); lrintl(0.0l); lround(0.0); lroundf(0.0f); lroundl(0.0l); nan(""); nanf(""); nanl(""); nearbyint(0.0); nearbyintf(0.0f); nearbyintl(0.0l); nextafter(0.0, 0.0); nextafterf(0.0f, 0.0f); nextafterl(0.0l, 0.0l); nexttoward(0.0, 0.0); nexttowardf(0.0f, 0.0f); nexttowardl(0.0l, 0.0l); remainder(0.0, 0.0); remainderf(0.0f, 0.0f); remainderl(0.0l, 0.0l); remquo(0.0, 0.0, 0); remquof(0.0f, 0.0f, 0); remquol(0.0l, 0.0l, 0); rint(0.0); rintf(0.0f); rintl(0.0l); round(0.0); roundf(0.0f); roundl(0.0l); scalbln(0.0, 0l); scalblnf(0.0f, 0l); scalblnl(0.0l, 0l); scalbn(0.0, 0); scalbnf(0.0f, 0); scalbnl(0.0l, 0); tgamma(0.0); tgammaf(0.0f); tgammal(0.0l); trunc(0.0); truncf(0.0f); truncl(0.0l); ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no]) ]) if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1, [Define if C99 functions or macros in <math.h> should be imported in <tr1/cmath> in namespace std::tr1.]) fi # Check for the existence of <inttypes.h> functions (NB: doesn't make # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). ac_c99_inttypes_tr1=no; if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>]) AC_TRY_COMPILE([#include <inttypes.h>], [intmax_t i, numer, denom, base; const char* s; char** endptr; intmax_t ret = imaxabs(i); imaxdiv_t dret = imaxdiv(numer, denom); ret = strtoimax(s, endptr, base); uintmax_t uret = strtoumax(s, endptr, base); ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no]) AC_MSG_RESULT($ac_c99_inttypes_tr1) fi if test x"$ac_c99_inttypes_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1, [Define if C99 functions in <inttypes.h> should be imported in <tr1/cinttypes> in namespace std::tr1.]) fi # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). ac_c99_inttypes_wchar_t_tr1=no; if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>]) AC_TRY_COMPILE([#include <inttypes.h>], [intmax_t base; const wchar_t* s; wchar_t** endptr; intmax_t ret = wcstoimax(s, endptr, base); uintmax_t uret = wcstoumax(s, endptr, base); ],[ac_c99_inttypes_wchar_t_tr1=yes], [ac_c99_inttypes_wchar_t_tr1=no]) AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1) fi if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1, [Define if wchar_t C99 functions in <inttypes.h> should be imported in <tr1/cinttypes> in namespace std::tr1.]) fi # Check for the existence of the <stdbool.h> header. AC_CHECK_HEADERS(stdbool.h) # Check for the existence of the <stdalign.h> header. AC_CHECK_HEADERS(stdalign.h) CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check for uchar.h and usability. dnl AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [ # Test uchar.h. AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no) AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -std=c++11" if test x"$ac_has_uchar_h" = x"yes"; then AC_MSG_CHECKING([for ISO C11 support for <uchar.h>]) AC_TRY_COMPILE([#include <uchar.h> #ifdef __STDC_UTF_16__ long i = __STDC_UTF_16__; #endif #ifdef __STDC_UTF_32__ long j = __STDC_UTF_32__; #endif namespace test { using ::c16rtomb; using ::c32rtomb; using ::mbrtoc16; using ::mbrtoc32; } ], [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no]) AC_MSG_RESULT($ac_c11_uchar_cxx11) else ac_c11_uchar_cxx11=no fi if test x"$ac_c11_uchar_cxx11" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1, [Define if C11 functions in <uchar.h> should be imported into namespace std in <cuchar>.]) fi CXXFLAGS="$CXXFLAGS -fchar8_t" if test x"$ac_has_uchar_h" = x"yes"; then AC_MSG_CHECKING([for c8rtomb and mbrtoc8 in <uchar.h> with -fchar8_t]) AC_TRY_COMPILE([#include <uchar.h> namespace test { using ::c8rtomb; using ::mbrtoc8; } ], [], [ac_uchar_c8rtomb_mbrtoc8_fchar8_t=yes], [ac_uchar_c8rtomb_mbrtoc8_fchar8_t=no]) AC_MSG_RESULT($ac_uchar_c8rtomb_mbrtoc8_fchar8_t) else ac_uchar_c8rtomb_mbrtoc8_fchar8_t=no fi if test x"$ac_uchar_c8rtomb_mbrtoc8_fchar8_t" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_FCHAR8_T, 1, [Define if c8rtomb and mbrtoc8 functions in <uchar.h> should be imported into namespace std in <cuchar> for -fchar8_t.]) fi CXXFLAGS="$CXXFLAGS -std=c++20" if test x"$ac_has_uchar_h" = x"yes"; then AC_MSG_CHECKING([for c8rtomb and mbrtoc8 in <uchar.h> with -std=c++20]) AC_TRY_COMPILE([#include <uchar.h> namespace test { using ::c8rtomb; using ::mbrtoc8; } ], [], [ac_uchar_c8rtomb_mbrtoc8_cxx20=yes], [ac_uchar_c8rtomb_mbrtoc8_cxx20=no]) AC_MSG_RESULT($ac_uchar_c8rtomb_mbrtoc8_cxx20) else ac_uchar_c8rtomb_mbrtoc8_cxx20=no fi if test x"$ac_uchar_c8rtomb_mbrtoc8_cxx20" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_CXX20, 1, [Define if c8rtomb and mbrtoc8 functions in <uchar.h> should be imported into namespace std in <cuchar> for C++20.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether "/dev/random" and "/dev/urandom" are available for dnl class std::random_device from C++ 2011 [rand.device], and dnl random_device of "TR1" (Chapter 5.1, "Random number generation"). dnl AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [ AC_CACHE_CHECK([for "/dev/random" and "/dev/urandom" for std::random_device], glibcxx_cv_dev_random, [ if test -r /dev/random && test -r /dev/urandom; then ## For MSys environment the test above is detected as false-positive ## on mingw-targets. So disable it explicitly for them. case ${target_os} in *mingw*) glibcxx_cv_dev_random=no ;; *) glibcxx_cv_dev_random=yes ;; esac else glibcxx_cv_dev_random=no; fi ]) if test x"$glibcxx_cv_dev_random" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1, [Define if /dev/random and /dev/urandom are available for std::random_device.]) AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1, [Define if /dev/random and /dev/urandom are available for the random_device of TR1 (Chapter 5.1).]) fi ]) dnl dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants. dnl AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [ if test "$is_hosted" = yes; then AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [ AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]], [#include <stdio.h>], [AC_MSG_ERROR([computing EOF failed])]) ]) AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof, [Define to the value of the EOF integer constant.]) AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [ AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]], [#include <stdio.h>], [AC_MSG_ERROR([computing SEEK_CUR failed])]) ]) AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur, [Define to the value of the SEEK_CUR integer constant.]) AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [ AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]], [#include <stdio.h>], [AC_MSG_ERROR([computing SEEK_END failed])]) ]) AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end, [Define to the value of the SEEK_END integer constant.]) fi ]) dnl dnl Check whether required C++ overloads are present in <stdio.h>. dnl AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS # Use C++11 because a conforming <stdio.h> won't define gets for C++14, # and we don't need a declaration for C++14 anyway. ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -std=gnu++11" AC_CACHE_CHECK([for gets declaration], glibcxx_cv_gets, [ AC_COMPILE_IFELSE([AC_LANG_SOURCE( [#include <stdio.h> namespace test { using ::gets; } ])], [glibcxx_cv_gets=yes], [glibcxx_cv_gets=no] )]) if test $glibcxx_cv_gets = yes; then AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether required C++11 overloads for floating point and integral dnl types are present in <math.h>. dnl AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -std=c++11" case "$host" in *-*-solaris2.*) # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch # 11996[67]-02 introduced the C++11 <math.h> floating point overloads. AC_CACHE_CHECK([for C++11 <math.h> floating point overloads], glibcxx_cv_math11_fp_overload, [ AC_COMPILE_IFELSE([AC_LANG_SOURCE( [#include <math.h> #undef isfinite namespace std { inline bool isfinite(float __x) { return __builtin_isfinite(__x); } } ])], [glibcxx_cv_math11_fp_overload=no], [glibcxx_cv_math11_fp_overload=yes] )]) # autoheader cannot handle indented templates. AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP], [/* Define if all C++11 floating point overloads are available in <math.h>. */ #if __cplusplus >= 201103L #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP #endif]) if test $glibcxx_cv_math11_fp_overload = yes; then AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP) fi # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch # 11996[67]-02 introduced the C++11 <math.h> integral type overloads. AC_CACHE_CHECK([for C++11 <math.h> integral type overloads], glibcxx_cv_math11_int_overload, [ AC_COMPILE_IFELSE([AC_LANG_SOURCE( [#include <math.h> namespace std { template<typename _Tp> struct __is_integer; template<> struct __is_integer<int> { enum { __value = 1 }; }; } namespace __gnu_cxx { template<bool, typename> struct __enable_if; template<typename _Tp> struct __enable_if<true, _Tp> { typedef _Tp __type; }; } namespace std { template<typename _Tp> constexpr typename __gnu_cxx::__enable_if <__is_integer<_Tp>::__value, double>::__type log2(_Tp __x) { return __builtin_log2(__x); } } int main (void) { int i = 1000; return std::log2(i); } ])], [glibcxx_cv_math11_int_overload=no], [glibcxx_cv_math11_int_overload=yes] )]) # autoheader cannot handle indented templates. AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT], [/* Define if all C++11 integral type overloads are available in <math.h>. */ #if __cplusplus >= 201103L #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT #endif]) if test $glibcxx_cv_math11_int_overload = yes; then AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT) fi ;; *) # If <math.h> defines the obsolete isinf(double) and isnan(double) # functions (instead of or as well as the C99 generic macros) then we # can't define std::isinf(double) and std::isnan(double) in <cmath> # and must use the ones from <math.h> instead. AC_CACHE_CHECK([for obsolete isinf function in <math.h>], glibcxx_cv_obsolete_isinf, [ AC_COMPILE_IFELSE([AC_LANG_SOURCE( [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS #include <math.h> #undef isinf namespace std { using ::isinf; bool isinf(float); bool isinf(long double); } using std::isinf; bool b = isinf(0.0); ])], [glibcxx_cv_obsolete_isinf=yes], [glibcxx_cv_obsolete_isinf=no] )]) if test $glibcxx_cv_obsolete_isinf = yes; then AC_DEFINE(HAVE_OBSOLETE_ISINF, 1, [Define if <math.h> defines obsolete isinf function.]) fi AC_CACHE_CHECK([for obsolete isnan function in <math.h>], glibcxx_cv_obsolete_isnan, [ AC_COMPILE_IFELSE([AC_LANG_SOURCE( [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS #include <math.h> #undef isnan namespace std { using ::isnan; bool isnan(float); bool isnan(long double); } using std::isnan; bool b = isnan(0.0); ])], [glibcxx_cv_obsolete_isnan=yes], [glibcxx_cv_obsolete_isnan=no] )]) if test $glibcxx_cv_obsolete_isnan = yes; then AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1, [Define if <math.h> defines obsolete isnan function.]) fi ;; esac CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check for what type of C headers to use. dnl dnl --enable-cheaders= [does stuff]. dnl --disable-cheaders [does not do anything, really]. dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'. dnl dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as dnl well as --enable-cheaders=c_std, otherwise configure will fail. dnl AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ GLIBCXX_ENABLE(cheaders-obsolete,no,, [allow use of obsolete "C" headers for g++]) GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]], [construct "C" headers for g++], [permit c|c_global|c_std]) AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) if test $enable_cheaders = c_std ; then AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead]) AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org]) if test $enable_cheaders_obsolete != yes ; then AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers) fi fi C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders # Allow overrides to configure.host here. if test $enable_cheaders = c_global; then c_compatibility=yes fi AC_SUBST(C_INCLUDE_DIR) GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global) GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) ]) dnl dnl Check for which locale library to use. The choice is mapped to dnl a subdirectory of config/locale. dnl dnl Default is generic. dnl AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]], [use MODEL for target locale package], [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto]) # Deal with gettext issues. Default to not using it (=no) until we detect # support for it later. Let the user turn it off via --e/d, but let that # default to on for easier handling. USE_NLS=no AC_ARG_ENABLE(nls, AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), [], [enable_nls=yes]) # Either a known package, or "auto" if test $enable_clocale = no || test $enable_clocale = yes; then enable_clocale=auto fi enable_clocale_flag=$enable_clocale # Probe for locale model to use if none specified. # Default to "generic". if test $enable_clocale_flag = auto; then case ${target_os} in linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) enable_clocale_flag=gnu ;; darwin*) enable_clocale_flag=darwin ;; vxworks*) enable_clocale_flag=vxworks ;; dragonfly* | freebsd*) enable_clocale_flag=dragonfly ;; openbsd*) enable_clocale_flag=newlib ;; *) if test x"$with_newlib" = x"yes"; then enable_clocale_flag=newlib else enable_clocale_flag=generic fi ;; esac fi # Sanity check model, and test for special functionality. if test $enable_clocale_flag = gnu; then AC_EGREP_CPP([_GLIBCXX_ok], [ #include <features.h> #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__) _GLIBCXX_ok #endif ], enable_clocale_flag=gnu, enable_clocale_flag=generic) # Set it to scream when it hurts. ac_save_CFLAGS="$CFLAGS" CFLAGS="-Wimplicit-function-declaration -Werror" # Use strxfrm_l if available. AC_TRY_COMPILE([#define _GNU_SOURCE 1 #include <string.h> #include <locale.h>], [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);], AC_DEFINE(HAVE_STRXFRM_L, 1, [Define if strxfrm_l is available in <string.h>.]),) # Use strerror_l if available. AC_TRY_COMPILE([#define _GNU_SOURCE 1 #include <string.h> #include <locale.h>], [__locale_t loc; strerror_l(5, loc);], AC_DEFINE(HAVE_STRERROR_L, 1, [Define if strerror_l is available in <string.h>.]),) CFLAGS="$ac_save_CFLAGS" fi # Perhaps use strerror_r if available, and strerror_l isn't. ac_save_CFLAGS="$CFLAGS" CFLAGS="-Wimplicit-function-declaration -Werror" AC_TRY_COMPILE([#define _GNU_SOURCE 1 #include <string.h> #include <locale.h>], [char s[128]; strerror_r(5, s, 128);], AC_DEFINE(HAVE_STRERROR_R, 1, [Define if strerror_r is available in <string.h>.]),) CFLAGS="$ac_save_CFLAGS" # Set configure bits for specified locale package AC_MSG_CHECKING([for C locale to use]) case ${enable_clocale_flag} in generic) AC_MSG_RESULT(generic) CLOCALE_H=config/locale/generic/c_locale.h CLOCALE_CC=config/locale/generic/c_locale.cc CCODECVT_CC=config/locale/generic/codecvt_members.cc CCOLLATE_CC=config/locale/generic/collate_members.cc CCTYPE_CC=config/locale/generic/ctype_members.cc CMESSAGES_H=config/locale/generic/messages_members.h CMESSAGES_CC=config/locale/generic/messages_members.cc CMONEY_CC=config/locale/generic/monetary_members.cc CNUMERIC_CC=config/locale/generic/numeric_members.cc CTIME_H=config/locale/generic/time_members.h CTIME_CC=config/locale/generic/time_members.cc CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h ;; darwin) AC_MSG_RESULT(darwin) CLOCALE_H=config/locale/generic/c_locale.h CLOCALE_CC=config/locale/generic/c_locale.cc CCODECVT_CC=config/locale/generic/codecvt_members.cc CCOLLATE_CC=config/locale/generic/collate_members.cc CCTYPE_CC=config/locale/darwin/ctype_members.cc CMESSAGES_H=config/locale/generic/messages_members.h CMESSAGES_CC=config/locale/generic/messages_members.cc CMONEY_CC=config/locale/generic/monetary_members.cc CNUMERIC_CC=config/locale/generic/numeric_members.cc CTIME_H=config/locale/generic/time_members.h CTIME_CC=config/locale/generic/time_members.cc CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h ;; vxworks) AC_MSG_RESULT(vxworks) CLOCALE_H=config/locale/generic/c_locale.h CLOCALE_CC=config/locale/generic/c_locale.cc CCODECVT_CC=config/locale/generic/codecvt_members.cc CCOLLATE_CC=config/locale/generic/collate_members.cc CCTYPE_CC=config/locale/vxworks/ctype_members.cc CMESSAGES_H=config/locale/generic/messages_members.h CMESSAGES_CC=config/locale/generic/messages_members.cc CMONEY_CC=config/locale/generic/monetary_members.cc CNUMERIC_CC=config/locale/generic/numeric_members.cc CTIME_H=config/locale/generic/time_members.h CTIME_CC=config/locale/generic/time_members.cc CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h ;; dragonfly) AC_MSG_RESULT(dragonfly or freebsd) CLOCALE_H=config/locale/dragonfly/c_locale.h CLOCALE_CC=config/locale/dragonfly/c_locale.cc CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc CCOLLATE_CC=config/locale/dragonfly/collate_members.cc CCTYPE_CC=config/locale/dragonfly/ctype_members.cc CMESSAGES_H=config/locale/generic/messages_members.h CMESSAGES_CC=config/locale/generic/messages_members.cc CMONEY_CC=config/locale/dragonfly/monetary_members.cc CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc CTIME_H=config/locale/dragonfly/time_members.h CTIME_CC=config/locale/dragonfly/time_members.cc CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h ;; gnu) AC_MSG_RESULT(gnu) # Declare intention to use gettext, and add support for specific # languages. # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT ALL_LINGUAS="de fr" # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then USE_NLS=yes fi # Export the build objects. for ling in $ALL_LINGUAS; do \ glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ done AC_SUBST(glibcxx_MOFILES) AC_SUBST(glibcxx_POFILES) CLOCALE_H=config/locale/gnu/c_locale.h CLOCALE_CC=config/locale/gnu/c_locale.cc CCODECVT_CC=config/locale/gnu/codecvt_members.cc CCOLLATE_CC=config/locale/gnu/collate_members.cc CCTYPE_CC=config/locale/gnu/ctype_members.cc CMESSAGES_H=config/locale/gnu/messages_members.h CMESSAGES_CC=config/locale/gnu/messages_members.cc CMONEY_CC=config/locale/gnu/monetary_members.cc CNUMERIC_CC=config/locale/gnu/numeric_members.cc CTIME_H=config/locale/gnu/time_members.h CTIME_CC=config/locale/gnu/time_members.cc CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h ;; ieee_1003.1-2001) AC_MSG_RESULT(IEEE 1003.1) CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc CCODECVT_CC=config/locale/generic/codecvt_members.cc CCOLLATE_CC=config/locale/generic/collate_members.cc CCTYPE_CC=config/locale/generic/ctype_members.cc CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc CMONEY_CC=config/locale/generic/monetary_members.cc CNUMERIC_CC=config/locale/generic/numeric_members.cc CTIME_H=config/locale/generic/time_members.h CTIME_CC=config/locale/generic/time_members.cc CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h ;; newlib) AC_MSG_RESULT(newlib) CLOCALE_H=config/locale/generic/c_locale.h CLOCALE_CC=config/locale/generic/c_locale.cc CCODECVT_CC=config/locale/generic/codecvt_members.cc CCOLLATE_CC=config/locale/generic/collate_members.cc CCTYPE_CC=config/locale/newlib/ctype_members.cc CMESSAGES_H=config/locale/generic/messages_members.h CMESSAGES_CC=config/locale/generic/messages_members.cc CMONEY_CC=config/locale/generic/monetary_members.cc CNUMERIC_CC=config/locale/generic/numeric_members.cc CTIME_H=config/locale/generic/time_members.h CTIME_CC=config/locale/generic/time_members.cc CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h ;; esac # This is where the testsuite looks for locale catalogs, using the # -DLOCALEDIR define during testsuite compilation. glibcxx_localedir=${glibcxx_builddir}/po/share/locale AC_SUBST(glibcxx_localedir) # A standalone libintl (e.g., GNU libintl) may be in use. if test $USE_NLS = yes; then AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) fi if test $USE_NLS = yes; then AC_DEFINE(_GLIBCXX_USE_NLS, 1, [Define if NLS translations are to be used.]) fi AC_SUBST(USE_NLS) AC_SUBST(CLOCALE_H) AC_SUBST(CMESSAGES_H) AC_SUBST(CCODECVT_CC) AC_SUBST(CCOLLATE_CC) AC_SUBST(CCTYPE_CC) AC_SUBST(CMESSAGES_CC) AC_SUBST(CMONEY_CC) AC_SUBST(CNUMERIC_CC) AC_SUBST(CTIME_H) AC_SUBST(CTIME_CC) AC_SUBST(CLOCALE_CC) AC_SUBST(CLOCALE_INTERNAL_H) ]) dnl dnl Check for which std::allocator base class to use. The choice is dnl mapped from a subdirectory of include/ext. dnl dnl Default is new. dnl AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ AC_MSG_CHECKING([for std::allocator base class]) GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]], [use KIND for target std::allocator base], [permit new|malloc|yes|no|auto]) # If they didn't use this option switch, or if they specified --enable # with no specific model, we'll have to look for one. If they # specified --disable (???), do likewise. if test $enable_libstdcxx_allocator = no || test $enable_libstdcxx_allocator = yes; then enable_libstdcxx_allocator=auto fi # Either a known package, or "auto". Auto implies the default choice # for a particular platform. enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator # Probe for host-specific support if no specific model is specified. # Default to "new". if test $enable_libstdcxx_allocator_flag = auto; then case ${target_os} in linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) enable_libstdcxx_allocator_flag=new ;; *) enable_libstdcxx_allocator_flag=new ;; esac fi AC_MSG_RESULT($enable_libstdcxx_allocator_flag) # Set configure bits for specified locale package case ${enable_libstdcxx_allocator_flag} in malloc) ALLOCATOR_H=config/allocator/malloc_allocator_base.h ALLOCATOR_NAME=__gnu_cxx::malloc_allocator ;; new) ALLOCATOR_H=config/allocator/new_allocator_base.h ALLOCATOR_NAME=__gnu_cxx::new_allocator ;; esac GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW, test $enable_libstdcxx_allocator_flag = new) AC_SUBST(ALLOCATOR_H) AC_SUBST(ALLOCATOR_NAME) ]) dnl dnl Check for whether the Boost-derived checks should be turned on. dnl dnl --enable-concept-checks turns them on. dnl --disable-concept-checks leaves them off. dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] dnl Where DEFAULT is either `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) if test $enable_concept_checks = yes; then AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, [Define to use concept checking code from the boost libraries.]) fi ]) dnl dnl Use extern templates. dnl dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)] dnl Where DEFAULT is `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [ GLIBCXX_ENABLE(extern-template,$1,,[enable extern template]) AC_MSG_CHECKING([for extern template support]) AC_MSG_RESULT([$enable_extern_template]) GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes) ]) dnl dnl Use vtable verification. dnl dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)] dnl Where DEFAULT is `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [ GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify]) AC_MSG_CHECKING([for vtable verify support]) AC_MSG_RESULT([$enable_vtable_verify]) vtv_cygmin=no if test $enable_vtable_verify = yes; then case ${target_os} in cygwin*|mingw32*) VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end" VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" vtv_cygmin=yes ;; darwin*) VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end" VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs" ;; solaris2*) VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs" ;; *) VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" ;; esac VTV_PCH_CXXFLAGS="-fvtable-verify=std" else VTV_CXXFLAGS= VTV_PCH_CXXFLAGS= VTV_CXXLINKFLAGS= fi AC_SUBST(VTV_CXXFLAGS) AC_SUBST(VTV_PCH_CXXFLAGS) AC_SUBST(VTV_CXXLINKFLAGS) AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes) GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes) ]) dnl dnl Check for parallel mode pre-requisites, including OpenMP support. dnl dnl + Usage: GLIBCXX_ENABLE_PARALLEL dnl AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ enable_parallel=no; # See if configured libgomp/omp.h exists. (libgomp may be in # noconfigdirs but not explicitly disabled.) if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then enable_parallel=yes; else AC_MSG_NOTICE([target-libgomp not built]) fi AC_MSG_CHECKING([for parallel mode support]) AC_MSG_RESULT([$enable_parallel]) ]) dnl dnl Check for which I/O library to use: stdio and POSIX, or pure stdio. dnl dnl Default is stdio_posix. dnl AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ AC_MSG_CHECKING([for underlying I/O to use]) GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]], [use target-specific I/O package], [permit stdio|stdio_posix|stdio_pure]) # The only available I/O model is based on stdio, via basic_file_stdio. # The default "stdio" is actually "stdio + POSIX" because it uses fdopen(3) # to get a file descriptor and then uses read(3) and write(3) with it. # The "stdio_pure" model doesn't use fdopen and only uses FILE* for I/O. case ${enable_cstdio} in stdio*) CSTDIO_H=config/io/c_io_stdio.h BASIC_FILE_H=config/io/basic_file_stdio.h BASIC_FILE_CC=config/io/basic_file_stdio.cc if test "x$enable_cstdio" = "xstdio_pure" ; then AC_MSG_RESULT([stdio (without POSIX read/write)]) AC_DEFINE(_GLIBCXX_USE_STDIO_PURE, 1, [Define to restrict std::__basic_file<> to stdio APIs.]) else AC_MSG_RESULT([stdio (with POSIX read/write)]) fi ;; esac AC_SUBST(CSTDIO_H) AC_SUBST(BASIC_FILE_H) AC_SUBST(BASIC_FILE_CC) ]) dnl dnl Check for "unusual" flags to pass to the compiler while building. dnl dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. dnl --disable-cxx-flags passes nothing. dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) dnl If "default flags" is an empty string, the effect is the same dnl as --disable or --enable=no. dnl AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl AC_MSG_CHECKING([for extra compiler flags for building]) GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], [pass compiler FLAGS when building library], [case "x$enable_cxx_flags" in xno | x) enable_cxx_flags= ;; x-*) ;; *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; esac]) # Run through flags (either default or command-line) and set anything # extra (e.g., #defines) that must accompany particular g++ options. if test -n "$enable_cxx_flags"; then for f in $enable_cxx_flags; do case "$f" in -fhonor-std) ;; -*) ;; *) # and we're trying to pass /what/ exactly? AC_MSG_ERROR([compiler flags start with a -]) ;; esac done fi EXTRA_CXX_FLAGS="$enable_cxx_flags" AC_MSG_RESULT($EXTRA_CXX_FLAGS) AC_SUBST(EXTRA_CXX_FLAGS) ]) dnl dnl Check to see if debugging libraries are to be built. dnl dnl --enable-libstdcxx-debug dnl builds a separate set of debugging libraries in addition to the dnl normal (shared, static) libstdc++ binaries. dnl dnl --disable-libstdcxx-debug dnl builds only one (non-debug) version of libstdc++. dnl dnl --enable-libstdcxx-debug-flags=FLAGS dnl iff --enable-debug == yes, then use FLAGS to build the debug library. dnl dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] dnl Where DEFAULT is either `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ AC_MSG_CHECKING([for additional debug build]) skip_debug_build= GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) if test x$enable_libstdcxx_debug = xyes; then if test -f $toplevel_builddir/../stage_final \ && test -f $toplevel_builddir/../stage_current; then stage_final=`cat $toplevel_builddir/../stage_final` stage_current=`cat $toplevel_builddir/../stage_current` if test x$stage_current != x$stage_final ; then skip_debug_build=" (skipped for bootstrap stage $stage_current)" enable_libstdcxx_debug=no fi fi fi AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build) GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) ]) dnl dnl Check for explicit debug flags. dnl dnl --enable-libstdcxx-debug-flags='-O1' dnl is a general method for passing flags to be used when dnl building debug libraries with --enable-libstdcxx-debug. dnl dnl --disable-libstdcxx-debug-flags does nothing. dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) dnl If "default flags" is an empty string, the effect is the same dnl as --disable or --enable=no. dnl AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], [pass compiler FLAGS when building debug library], [case "x$enable_libstdcxx_debug_flags" in xno | x) enable_libstdcxx_debug_flags= ;; x-*) ;; *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; esac]) # Option parsed, now set things appropriately DEBUG_FLAGS="$enable_libstdcxx_debug_flags" AC_SUBST(DEBUG_FLAGS) AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) ]) dnl dnl Check if the user only wants a freestanding library implementation. dnl dnl --disable-hosted-libstdcxx will turn off most of the library build, dnl installing only the headers required by [17.4.1.3] and the language dnl support library. More than that will be built (to keep the Makefiles dnl conveniently clean), but not installed. dnl dnl Also define --disable-libstdcxx-hosted as an alias for dnl --disable-hosted-libstdcxx but fail if both are given dnl and their values do not agree. dnl dnl Sets: dnl is_hosted (yes/no) dnl dnl Defines: dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) dnl AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ AC_ARG_ENABLE([hosted-libstdcxx], AC_HELP_STRING([--disable-hosted-libstdcxx], [only build freestanding C++ runtime support]), [enable_hosted_libstdcxx_was_given=yes], [case "$host" in arm*-*-symbianelf*) enable_hosted_libstdcxx=no ;; *) case "${with_newlib}-${with_headers}" in no-no) enable_hosted_libstdcxx=no ;; *) enable_hosted_libstdcxx=yes ;; esac ;; esac]) # Because most configure args are --enable-libstdcxx-foo add an alias # of that form for --enable-hosted-libstdcxx. AC_ARG_ENABLE([libstdcxx-hosted], AC_HELP_STRING([--disable-libstdcxx-hosted], [alias for --disable-hosted-libstdcxx]), [if test "$enable_hosted_libstdcxx_was_given" = yes; then if test "$enable_hosted_libstdcxx" != "$enableval"; then AC_MSG_ERROR([--enable-libstdcxx-hosted=$enableval conflicts with --enable-hosted-libstdcxx=$enable_hosted_libstdcxx]) fi else enable_hosted_libstdcxx=${enableval} fi ],) freestanding_flags= if test "$enable_hosted_libstdcxx" = no; then AC_MSG_NOTICE([Only freestanding libraries will be built]) is_hosted=no hosted_define=0 enable_abi_check=no enable_libstdcxx_pch=no if test "x$with_headers" = xno; then freestanding_flags="-ffreestanding" fi else is_hosted=yes hosted_define=__STDC_HOSTED__ fi GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, [Define to 1 if a full hosted library is built, or 0 if freestanding.]) FREESTANDING_FLAGS="$freestanding_flags" AC_SUBST(FREESTANDING_FLAGS) ]) dnl dnl Check if the user wants a non-verbose library implementation. dnl dnl --disable-libstdcxx-verbose will turn off descriptive messages to dnl standard error on termination. dnl dnl Defines: dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0) dnl AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [ AC_ARG_ENABLE([libstdcxx-verbose], AC_HELP_STRING([--disable-libstdcxx-verbose], [disable termination messages to standard error]),, [enable_libstdcxx_verbose=yes]) if test x"$enable_libstdcxx_verbose" = xyes; then verbose_define=1 else AC_MSG_NOTICE([verbose termination messages are disabled]) verbose_define=0 fi AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define, [Define to 1 if a verbose library is built, or 0 otherwise.]) ]) dnl dnl Check for template specializations for the 'long long' type. dnl The result determines only whether 'long long' I/O is enabled; things dnl like numeric_limits<> specializations are always available. dnl dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] dnl Where DEFAULT is either `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long']) if test $enable_long_long = yes; then AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1, [Define if code specialized for long long should be used.]) fi AC_MSG_CHECKING([for enabled long long specializations]) AC_MSG_RESULT([$enable_long_long]) ]) dnl dnl Check for decimal floating point. dnl See: dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float dnl dnl This checks to see if the host supports decimal floating point types. dnl dnl Defines: dnl _GLIBCXX_USE_DECIMAL_FLOAT dnl AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [ # Fake what AC_TRY_COMPILE does, without linking as this is # unnecessary for this test. cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" int main() { _Decimal32 d1; _Decimal64 d2; _Decimal128 d3; return 0; } EOF AC_MSG_CHECKING([for ISO/IEC TR 24733 ]) if AC_TRY_EVAL(ac_compile); then AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1, [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.]) enable_dfp=yes else enable_dfp=no fi AC_MSG_RESULT($enable_dfp) rm -f conftest* ]) dnl dnl Check for GNU 128-bit floating point type. dnl dnl Note: also checks that the type isn't a standard types. dnl dnl Defines: dnl ENABLE_FLOAT128 dnl AC_DEFUN([GLIBCXX_ENABLE_FLOAT128], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS # Fake what AC_TRY_COMPILE does, without linking as this is # unnecessary for this test. cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" template<typename T1, typename T2> struct same { typedef T2 type; }; template<typename T> struct same<T, T>; int main() { typename same<double, __float128>::type f1; typename same<long double, __float128>::type f2; } EOF AC_MSG_CHECKING([for __float128]) if AC_TRY_EVAL(ac_compile); then enable_float128=yes else enable_float128=no fi AC_MSG_RESULT($enable_float128) GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes) rm -f conftest* AC_LANG_RESTORE ]) dnl dnl Check for template specializations for the 'wchar_t' type. dnl dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)] dnl Where DEFAULT is either `yes' or `no'. dnl dnl Necessary support must also be present. dnl AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [ GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t']) # Test wchar.h for mbstate_t, which is needed for char_traits and fpos. AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) AC_MSG_CHECKING([for mbstate_t]) AC_TRY_COMPILE([#include <wchar.h>], [mbstate_t teststate;], have_mbstate_t=yes, have_mbstate_t=no) AC_MSG_RESULT($have_mbstate_t) if test x"$have_mbstate_t" = xyes; then AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.]) fi # Test it always, for use in GLIBCXX_ENABLE_C99, together with # ac_has_wchar_h. AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) if test x"$enable_wchar_t" = x"yes"; then AC_LANG_SAVE AC_LANG_CPLUSPLUS if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes; then AC_TRY_COMPILE([#include <wchar.h> #include <stddef.h> wint_t i; long l = WEOF; long j = WCHAR_MIN; long k = WCHAR_MAX; namespace test { using ::btowc; using ::fgetwc; using ::fgetws; using ::fputwc; using ::fputws; using ::fwide; using ::fwprintf; using ::fwscanf; using ::getwc; using ::getwchar; using ::mbrlen; using ::mbrtowc; using ::mbsinit; using ::mbsrtowcs; using ::putwc; using ::putwchar; using ::swprintf; using ::swscanf; using ::ungetwc; using ::vfwprintf; using ::vswprintf; using ::vwprintf; using ::wcrtomb; using ::wcscat; using ::wcschr; using ::wcscmp; using ::wcscoll; using ::wcscpy; using ::wcscspn; using ::wcsftime; using ::wcslen; using ::wcsncat; using ::wcsncmp; using ::wcsncpy; using ::wcspbrk; using ::wcsrchr; using ::wcsrtombs; using ::wcsspn; using ::wcsstr; using ::wcstod; using ::wcstok; using ::wcstol; using ::wcstoul; using ::wcsxfrm; using ::wctob; using ::wmemchr; using ::wmemcmp; using ::wmemcpy; using ::wmemmove; using ::wmemset; using ::wprintf; using ::wscanf; } ],[],[], [enable_wchar_t=no]) else enable_wchar_t=no fi AC_LANG_RESTORE fi if test x"$enable_wchar_t" = x"yes"; then AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1, [Define if code specialized for wchar_t should be used.]) fi AC_MSG_CHECKING([for enabled wchar_t specializations]) AC_MSG_RESULT([$enable_wchar_t]) ]) dnl dnl Check to see if building and using a C++ precompiled header can be done. dnl dnl --enable-libstdcxx-pch=yes dnl default, this shows intent to use stdc++.h.gch If it looks like it dnl may work, after some light-hearted attempts to puzzle out compiler dnl support, flip bits on in include/Makefile.am dnl dnl --disable-libstdcxx-pch dnl turns off attempts to use or build stdc++.h.gch. dnl dnl Substs: dnl glibcxx_PCHFLAGS dnl AC_DEFUN([GLIBCXX_ENABLE_PCH], [ GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) if test $enable_libstdcxx_pch = yes; then AC_CACHE_CHECK([for compiler with PCH support], [glibcxx_cv_prog_CXX_pch], [ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" AC_LANG_SAVE AC_LANG_CPLUSPLUS echo '#include <math.h>' > conftest.h if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ -o conftest.h.gch 1>&5 2>&1 && echo '#error "pch failed"' > conftest.h && echo '#include "conftest.h"' > conftest.cc && $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; then glibcxx_cv_prog_CXX_pch=yes else glibcxx_cv_prog_CXX_pch=no fi rm -f conftest* CXXFLAGS=$ac_save_CXXFLAGS AC_LANG_RESTORE ]) enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch fi AC_MSG_CHECKING([for enabled PCH]) AC_MSG_RESULT([$enable_libstdcxx_pch]) GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) if test $enable_libstdcxx_pch = yes; then glibcxx_PCHFLAGS="-include bits/stdc++.h" else glibcxx_PCHFLAGS="" fi AC_SUBST(glibcxx_PCHFLAGS) ]) dnl dnl Check for atomic builtins. dnl See: dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html dnl dnl This checks to see if the host supports the compiler-generated dnl builtins for atomic operations for various integral sizes. Note, this dnl is intended to be an all-or-nothing switch, so all the atomic operations dnl that are used should be checked. dnl dnl Note: dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. dnl AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS old_CXXFLAGS="$CXXFLAGS" # Do link tests if possible, instead asm tests, limited to some platforms # see discussion in PR target/40134, PR libstdc++/40133 and the thread # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html atomic_builtins_link_tests=no if test x$gcc_no_link != xyes; then # Can do link tests. Limit to some tested platforms case "$host" in *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*) atomic_builtins_link_tests=yes ;; esac fi if test x$atomic_builtins_link_tests = xyes; then # Do link tests. CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for atomic builtins for bool], glibcxx_cv_atomic_bool, [ AC_TRY_LINK( [ ], [typedef bool atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); // N.B. __atomic_fetch_add is not supported for bool. __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); ], [glibcxx_cv_atomic_bool=yes], [glibcxx_cv_atomic_bool=no]) ]) AC_CACHE_CHECK([for atomic builtins for short], glibcxx_cv_atomic_short, [ AC_TRY_LINK( [ ], [typedef short atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); ], [glibcxx_cv_atomic_short=yes], [glibcxx_cv_atomic_short=no]) ]) AC_CACHE_CHECK([for atomic builtins for int], glibcxx_cv_atomic_int, [ AC_TRY_LINK( [ ], [typedef int atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); ], [glibcxx_cv_atomic_int=yes], [glibcxx_cv_atomic_int=no]) ]) AC_CACHE_CHECK([for atomic builtins for long long], glibcxx_cv_atomic_long_long, [ AC_TRY_LINK( [ ], [typedef long long atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); ], [glibcxx_cv_atomic_long_long=yes], [glibcxx_cv_atomic_long_long=no]) ]) else # Do asm tests. # Compile unoptimized. CXXFLAGS='-O0 -S' # Fake what AC_TRY_COMPILE does. cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" int main() { typedef bool atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); // N.B. __atomic_fetch_add is not supported for bool. __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); return 0; } EOF AC_MSG_CHECKING([for atomic builtins for bool]) if AC_TRY_EVAL(ac_compile); then if grep __atomic_ conftest.s >/dev/null 2>&1 ; then glibcxx_cv_atomic_bool=no else glibcxx_cv_atomic_bool=yes fi fi AC_MSG_RESULT($glibcxx_cv_atomic_bool) rm -f conftest* cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" int main() { typedef short atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); return 0; } EOF AC_MSG_CHECKING([for atomic builtins for short]) if AC_TRY_EVAL(ac_compile); then if grep __atomic_ conftest.s >/dev/null 2>&1 ; then glibcxx_cv_atomic_short=no else glibcxx_cv_atomic_short=yes fi fi AC_MSG_RESULT($glibcxx_cv_atomic_short) rm -f conftest* cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" int main() { // NB: _Atomic_word not necessarily int. typedef int atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); return 0; } EOF AC_MSG_CHECKING([for atomic builtins for int]) if AC_TRY_EVAL(ac_compile); then if grep __atomic_ conftest.s >/dev/null 2>&1 ; then glibcxx_cv_atomic_int=no else glibcxx_cv_atomic_int=yes fi fi AC_MSG_RESULT($glibcxx_cv_atomic_int) rm -f conftest* cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" int main() { typedef long long atomic_type; atomic_type c1; atomic_type c2; atomic_type c3(0); __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED); __atomic_test_and_set(&c1, __ATOMIC_RELAXED); __atomic_load_n(&c1, __ATOMIC_RELAXED); return 0; } EOF AC_MSG_CHECKING([for atomic builtins for long long]) if AC_TRY_EVAL(ac_compile); then if grep __atomic_ conftest.s >/dev/null 2>&1 ; then glibcxx_cv_atomic_long_long=no else glibcxx_cv_atomic_long_long=yes fi fi AC_MSG_RESULT($glibcxx_cv_atomic_long_long) rm -f conftest* fi CXXFLAGS="$old_CXXFLAGS" AC_LANG_RESTORE # Set atomicity_dir to builtins if all but the long long test above passes, # or if the builtins were already chosen (e.g. by configure.host). if { test "$glibcxx_cv_atomic_bool" = yes \ && test "$glibcxx_cv_atomic_short" = yes \ && test "$glibcxx_cv_atomic_int" = yes; } \ || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1, [Define if the compiler supports C++11 atomics.]) atomicity_dir=cpu/generic/atomicity_builtins fi # If still generic, set to mutex. if test $atomicity_dir = "cpu/generic" ; then atomicity_dir=cpu/generic/atomicity_mutex AC_MSG_WARN([No native atomic operations are provided for this platform.]) if test "x$target_thread_file" = xsingle; then AC_MSG_WARN([They cannot be faked when thread support is disabled.]) AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) else AC_MSG_WARN([They will be faked using a mutex.]) AC_MSG_WARN([Performance of certain classes will degrade as a result.]) fi fi ]) dnl dnl Set default lock policy for synchronizing shared_ptr reference counting. dnl dnl --with-libstdcxx-lock-policy=auto dnl Use atomic operations for shared_ptr reference counting only if dnl the default target supports atomic compare-and-swap. dnl --with-libstdcxx-lock-policy=atomic dnl Use atomic operations for shared_ptr reference counting. dnl --with-libstdcxx-lock-policy=mutex dnl Use a mutex to synchronize shared_ptr reference counting. dnl dnl This controls the value of __gnu_cxx::__default_lock_policy, which dnl determines how shared_ptr reference counts are synchronized. dnl The option "atomic" means that atomic operations should be used, dnl "mutex" means that a mutex will be used. The default option, "auto", dnl will check if the target supports the compiler-generated builtins dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers, dnl and will use "atomic" if supported, "mutex" otherwise. dnl This option is ignored if the thread model used by GCC is "single", dnl as no synchronization is used at all in that case. dnl This option affects the library ABI (except in the "single" thread model). dnl dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used. dnl AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [ AC_ARG_WITH([libstdcxx-lock-policy], AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}], [synchronization policy for shared_ptr reference counting [default=auto]]), [libstdcxx_atomic_lock_policy=$withval], [libstdcxx_atomic_lock_policy=auto]) case "$libstdcxx_atomic_lock_policy" in atomic|mutex|auto) ;; *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;; esac AC_MSG_CHECKING([for lock policy for shared_ptr reference counts]) if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?! dnl Why don't we check 8-byte CAS for sparc64, where _Atomic_word is long?! dnl New targets should only check for CAS for the _Atomic_word type. AC_TRY_COMPILE([ #if defined __riscv # error "Defaulting to mutex-based locks for ABI compatibility" #endif #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 # error "No 2-byte compare-and-swap" #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 # error "No 4-byte compare-and-swap" #endif ],, [libstdcxx_atomic_lock_policy=atomic], [libstdcxx_atomic_lock_policy=mutex]) AC_LANG_RESTORE CXXFLAGS="$ac_save_CXXFLAGS" fi if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then AC_MSG_RESULT(atomic) AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1, [Defined if shared_ptr reference counting should use atomic operations.]) else AC_MSG_RESULT(mutex) fi ]) dnl dnl Allow visibility attributes to be used on namespaces, objects, etc. dnl dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. dnl --disable-libstdcxx-visibility turns off all use of visibility attributes. dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)] dnl Where DEFAULT is 'yes'. dnl AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [ GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage]) if test x$enable_libstdcxx_visibility = xyes ; then dnl all hail libgfortran dnl Check whether the target supports hidden visibility. AC_CACHE_CHECK([whether the target supports hidden visibility], glibcxx_cv_have_attribute_visibility, [ save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Werror" AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], [], glibcxx_cv_have_attribute_visibility=yes, glibcxx_cv_have_attribute_visibility=no) CFLAGS="$save_CFLAGS"]) if test $glibcxx_cv_have_attribute_visibility = no; then enable_libstdcxx_visibility=no fi fi GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes) AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility]) ]) dnl dnl Add version tags to symbols in shared library (or not), additionally dnl marking other symbols as private/local (or not). dnl dnl Sets libtool_VERSION, and determines shared library SONAME. dnl dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. dnl dnl --enable-symvers=style adds a version script to the linker call when dnl creating the shared library. The choice of version script is dnl controlled by 'style'. dnl --disable-symvers does not. dnl dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to dnl choose a default style based on linker characteristics. Passing dnl 'no' disables versioning. dnl AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]], [enables symbol versioning of the shared library], [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun]) # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we # don't know enough about $LD to do tricks... AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work # with extern "C++" in version scripts. AC_REQUIRE([GCC_PROG_GNU_CXXFILT]) # Turn a 'yes' into a suitable default. if test x$enable_symvers = xyes ; then if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then enable_symvers=no else if test $with_gnu_ld = yes ; then case ${target_os} in hpux*) enable_symvers=no ;; *) enable_symvers=gnu ;; esac else case ${target_os} in darwin*) enable_symvers=darwin ;; # Sun symbol versioning exists since Solaris 2.5. solaris2.[[5-9]]* | solaris2.1[[0-9]]*) # make_sunver.pl needs GNU c++filt to support extern "C++" in # version scripts, so disable symbol versioning if none can be # found. if test -z "$ac_cv_path_CXXFILT"; then AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) AC_MSG_WARN([=== no GNU c++filt could be found.]) AC_MSG_WARN([=== Symbol versioning will be disabled.]) enable_symvers=no else enable_symvers=sun fi ;; *) enable_symvers=no ;; esac fi fi fi # Check to see if 'darwin' or 'darwin-export' can win. if test x$enable_symvers = xdarwin-export ; then enable_symvers=darwin fi # Check if 'sun' was requested on non-Solaris 2 platforms. if test x$enable_symvers = xsun ; then case ${target_os} in solaris2*) # All fine. ;; *) # Unlikely to work. AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) AC_MSG_WARN([=== you are not targetting Solaris 2.]) AC_MSG_WARN([=== Symbol versioning will be disabled.]) enable_symvers=no ;; esac fi # Check to see if 'gnu' can win. if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace || test $enable_symvers = sun; then # Check to see if libgcc_s exists, indicating that shared libgcc is possible. AC_MSG_CHECKING([for shared libgcc]) ac_save_CFLAGS="$CFLAGS" CFLAGS=' -lgcc_s' AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) CFLAGS="$ac_save_CFLAGS" if test $glibcxx_shared_libgcc = no; then cat > conftest.c <<EOF int main (void) { return 0; } EOF changequote(,)dnl glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ -shared -shared-libgcc -o conftest.so \ conftest.c -v 2>&1 >/dev/null \ | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` changequote([,])dnl rm -f conftest.c conftest.so if test x${glibcxx_libgcc_s_suffix+set} = xset; then CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) CFLAGS="$ac_save_CFLAGS" fi fi AC_MSG_RESULT($glibcxx_shared_libgcc) # For GNU ld, we need at least this version. The format is described in # GLIBCXX_CHECK_LINKER_FEATURES above. glibcxx_min_gnu_ld_version=21400 # If no shared libgcc, can't win. if test $glibcxx_shared_libgcc != yes; then AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) AC_MSG_WARN([=== you are not building a shared libgcc_s.]) AC_MSG_WARN([=== Symbol versioning will be disabled.]) enable_symvers=no elif test $with_gnu_ld != yes && test $enable_symvers = sun; then : All interesting versions of Sun ld support sun style symbol versioning. elif test $with_gnu_ld != yes ; then # just fail for now AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) AC_MSG_WARN([=== you are not using the GNU linker.]) AC_MSG_WARN([=== Symbol versioning will be disabled.]) enable_symvers=no elif test $glibcxx_ld_is_gold = yes ; then : All versions of gold support symbol versioning. elif test $glibcxx_ld_is_mold = yes ; then : All versions of mold support symbol versioning. elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then # The right tools, the right setup, but too old. Fallbacks? AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) AC_MSG_WARN(=== You would need to upgrade your binutils to version) AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) AC_MSG_WARN([=== Symbol versioning will be disabled.]) enable_symvers=no fi fi # For libtool versioning info, format is CURRENT:REVISION:AGE libtool_VERSION=6:34:0 # Everything parsed; figure out what files and settings to use. case $enable_symvers in no) SYMVER_FILE=config/abi/pre/none.ver ;; gnu) SYMVER_FILE=config/abi/pre/gnu.ver AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1, [Define to use GNU versioning in the shared library.]) ;; gnu-versioned-namespace) libtool_VERSION=8:0:0 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1, [Define to use GNU namespace versioning in the shared library.]) ;; darwin) SYMVER_FILE=config/abi/pre/gnu.ver AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1, [Define to use darwin versioning in the shared library.]) ;; sun) SYMVER_FILE=config/abi/pre/gnu.ver AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1, [Define to use Sun versioning in the shared library.]) ;; esac if test x$enable_symvers != xno ; then AC_DEFINE(_GLIBCXX_SYMVER, 1, [Define to use symbol versioning in the shared library.]) fi AC_CACHE_CHECK([whether the target supports .symver directive], glibcxx_cv_have_as_symver_directive, [ AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], [], glibcxx_cv_have_as_symver_directive=yes, glibcxx_cv_have_as_symver_directive=no)]) if test $glibcxx_cv_have_as_symver_directive = yes; then AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, [Define to 1 if the target assembler supports .symver directive.]) fi AC_SUBST(SYMVER_FILE) AC_SUBST(port_specific_symbol_files) GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no) GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu) GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace) GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin) GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun) AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) if test $enable_symvers != no ; then case ${target_os} in # The Solaris 2 runtime linker doesn't support the GNU extension of # binding the same symbol to different versions solaris2*) ;; # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. *) AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) ;; esac fi # Now, set up compatibility support, if any. # In addition, need this to deal with std::size_t mangling in # src/compatibility.cc. In a perfect world, could use # typeid(std::size_t).name()[0] to do direct substitution. AC_MSG_CHECKING([for size_t as unsigned int]) ac_save_CFLAGS="$CFLAGS" CFLAGS="-Werror" AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;], [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no]) CFLAGS=$ac_save_CFLAGS if test "$glibcxx_size_t_is_i" = yes; then AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.]) fi AC_MSG_RESULT([$glibcxx_size_t_is_i]) AC_MSG_CHECKING([for ptrdiff_t as int]) ac_save_CFLAGS="$CFLAGS" CFLAGS="-Werror" AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;], [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no]) CFLAGS=$ac_save_CFLAGS if test "$glibcxx_ptrdiff_t_is_i" = yes; then AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.]) fi AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i]) ]) dnl dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. dnl We must stage the required headers so that they will be installed dnl with the library (unlike libgcc, the STL implementation is provided dnl solely within headers). Since we must not inject random user-space dnl macro names into user-provided C++ code, we first stage into <file>-in dnl and process to <file> with an output command. The reason for a two- dnl stage process here is to correctly handle $srcdir!=$objdir without dnl having to write complex code (the sed commands to clean the macro dnl namespace are complex and fragile enough as it is). We must also dnl add a relative path so that -I- is supported properly. dnl dnl Substs: dnl thread_header dnl AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ AC_MSG_CHECKING([for thread model used by GCC]) target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` AC_MSG_RESULT([$target_thread_file]) GCC_AC_THREAD_HEADER([$target_thread_file]) ]) dnl dnl Check if gthread implementation defines the types and functions dnl required by the c++0x thread library. Conforming gthread dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x. dnl dnl GLIBCXX_ENABLE_SYMVERS must be done before this. dnl AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [ GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support]) if test x$enable_libstdcxx_threads = xauto || test x$enable_libstdcxx_threads = xyes; then AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions \ -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc" target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` case $target_thread_file in posix) CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS" ;; win32) CXXFLAGS="$CXXFLAGS -D_WIN32_THREADS" # The support of condition variables is disabled by default in # the Win32 gthreads library, so enable it on explicit request. if test x$enable_libstdcxx_threads = xyes; then CXXFLAGS="$CXXFLAGS -D_WIN32_WINNT=0x0600" fi ;; esac AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available]) AC_TRY_COMPILE([#include <unistd.h>], [ // In case of POSIX threads check _POSIX_TIMEOUTS. #if (defined(_PTHREADS) \ && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0)) #error // In case of Win32 threads there is no support. #elif defined(_WIN32_THREADS) #error #endif ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0]) AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock, [Define to 1 if mutex_timedlock is available.]) if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ; else res_mutex_timedlock=no ; fi AC_MSG_RESULT([$res_mutex_timedlock]) AC_MSG_CHECKING([for gthreads library]) AC_TRY_COMPILE([#include "gthr.h"], [ #ifndef __GTHREADS_CXX0X #error #endif ], [ac_has_gthreads=yes], [ac_has_gthreads=no]) else ac_has_gthreads=no fi AC_MSG_RESULT([$ac_has_gthreads]) if test x"$ac_has_gthreads" = x"yes"; then AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1, [Define if gthreads library is available.]) # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14 # but only do so if we're using pthread in the gthread library. # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h # but the pthread library is not there by default and the gthread library # does not use it. AC_TRY_COMPILE([#include "gthr.h"], [ #if (!defined(_PTHREADS)) #error #endif ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no]) if test x"$ac_gthread_use_pthreads" = x"yes"; then AC_CHECK_TYPE([pthread_rwlock_t], [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1, [Define if POSIX read/write locks are available in <gthr.h>.])], [], [#include "gthr.h"]) fi # See above for the rationale. if test $target_thread_file = win32; then CPPFLAGS="$CPPFLAGS -D_WIN32_WINNT=0x0600" fi fi AC_CHECK_HEADER(semaphore.h, [ AC_MSG_CHECKING([for POSIX Semaphores and sem_timedwait]) AC_TRY_COMPILE([ #include <unistd.h> #include <semaphore.h> #include <limits.h> ], [ #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0 # error "POSIX Timeouts option not supported" #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0 # error "POSIX Semaphores option not supported" #else #if defined SEM_VALUE_MAX constexpr int sem_value_max = SEM_VALUE_MAX; #elif defined _POSIX_SEM_VALUE_MAX constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX; #else # error "SEM_VALUE_MAX not available" #endif sem_t sem; sem_init(&sem, 0, sem_value_max); struct timespec ts = { 0 }; sem_timedwait(&sem, &ts); #endif ], [ac_have_posix_semaphore=yes], [ac_have_posix_semaphore=no])], [ac_have_posix_semaphore=no]) if test $ac_have_posix_semaphore = yes ; then AC_DEFINE(HAVE_POSIX_SEMAPHORE, 1, [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.]) fi AC_MSG_RESULT([$ac_have_posix_semaphore]) CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) # Check whether LC_MESSAGES is available in <locale.h>. # Ulrich Drepper <drepper@cygnus.com>, 1995. # # This file can be copied and used freely without restrictions. It can # be used in projects which are not available under the GNU Public License # but which still want to provide support for the GNU gettext functionality. # Please note that the actual code is *not* freely available. AC_DEFUN([AC_LC_MESSAGES], [ AC_CHECK_HEADER(locale.h, [ AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES], ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) if test $ac_cv_val_LC_MESSAGES = yes; then AC_DEFINE(HAVE_LC_MESSAGES, 1, [Define if LC_MESSAGES is available in <locale.h>.]) fi ]) ]) dnl dnl Check whether rdrand is supported in the assembler. AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [ AC_CACHE_CHECK([for rdrand support in assembler], ac_cv_x86_rdrand, [ ac_cv_x86_rdrand=no case "$target" in i?86-*-* | \ x86_64-*-*) AC_TRY_COMPILE(, [asm("rdrand %eax");], [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no]) esac ]) if test $ac_cv_x86_rdrand = yes; then AC_DEFINE(_GLIBCXX_X86_RDRAND, 1, [ Defined if as can handle rdrand. ]) fi ]) dnl dnl Check whether rdseed is supported in the assembler. AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [ AC_CACHE_CHECK([for rdseed support in assembler], ac_cv_x86_rdseed, [ ac_cv_x86_rdseed=no case "$target" in i?86-*-* | \ x86_64-*-*) AC_TRY_COMPILE(, [asm("rdseed %eax");], [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no]) esac ]) if test $ac_cv_x86_rdseed = yes; then AC_DEFINE(_GLIBCXX_X86_RDSEED, 1, [ Defined if as can handle rdseed. ]) fi ]) dnl dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS. dnl AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for get_nprocs], glibcxx_cv_GET_NPROCS, [ GCC_TRY_COMPILE_OR_LINK( [#include <sys/sysinfo.h>], [int n = get_nprocs();], [glibcxx_cv_GET_NPROCS=yes], [glibcxx_cv_GET_NPROCS=no]) ]) if test $glibcxx_cv_GET_NPROCS = yes; then AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN. dnl AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for _SC_NPROCESSORS_ONLN], glibcxx_cv_SC_NPROCESSORS_ONLN, [ GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [int n = sysconf(_SC_NPROCESSORS_ONLN);], [glibcxx_cv_SC_NPROCESSORS_ONLN=yes], [glibcxx_cv_SC_NPROCESSORS_ONLN=no]) ]) if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN. dnl AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for _SC_NPROC_ONLN], glibcxx_cv_SC_NPROC_ONLN, [ GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [int n = sysconf(_SC_NPROC_ONLN);], [glibcxx_cv_SC_NPROC_ONLN=yes], [glibcxx_cv_SC_NPROC_ONLN=no]) ]) if test $glibcxx_cv_SC_NPROC_ONLN = yes; then AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP. dnl AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for pthreads_num_processors_np], glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [ GCC_TRY_COMPILE_OR_LINK( [#include <pthread.h>], [int n = pthread_num_processors_np();], [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes], [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no]) ]) if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use, dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT. dnl AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" ac_save_LIBS="$LIBS" LIBS="$LIBS -lpthread" AC_CACHE_CHECK([for pthread_cond_clockwait], glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [ GCC_TRY_COMPILE_OR_LINK( [#include <pthread.h>], [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);], [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes], [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no]) ]) if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" LIBS="$ac_save_LIBS" AC_LANG_RESTORE ]) dnl dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use, dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK. dnl AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" ac_save_LIBS="$LIBS" LIBS="$LIBS -lpthread" AC_CACHE_CHECK([for pthread_mutex_clocklock], glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [ GCC_TRY_COMPILE_OR_LINK( [#include <pthread.h>], [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);], [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes], [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no]) ]) if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, (_GLIBCXX_TSAN==0), [Define if pthread_mutex_clocklock is available in <pthread.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" LIBS="$ac_save_LIBS" AC_LANG_RESTORE ]) dnl dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use, dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK. dnl AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" ac_save_LIBS="$LIBS" LIBS="$LIBS -lpthread" AC_CACHE_CHECK([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock], glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [ GCC_TRY_COMPILE_OR_LINK( [#include <pthread.h>], [pthread_rwlock_t rwl; struct timespec ts;] [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);] [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);], [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes], [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no]) ]) if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" LIBS="$ac_save_LIBS" AC_LANG_RESTORE ]) dnl dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU. dnl AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" AC_CACHE_CHECK([for hw.ncpu sysctl], glibcxx_cv_SYSCTL_HW_NCPU, [ GCC_TRY_COMPILE_OR_LINK( [ #include <stddef.h> #include <sys/sysctl.h> ], [ int count; size_t size = sizeof(count); int mib[] = { CTL_HW, HW_NCPU }; sysctl(mib, 2, &count, &size, NULL, 0); ], [glibcxx_cv_SYSCTL_HW_NCPU=yes], [glibcxx_cv_SYSCTL_HW_NCPU=no]) ]) if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.]) fi CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check to see if python pretty printing can be activated. dnl dnl --with-python-dir=dir dnl installs directory into $prefix/dir AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [ AC_MSG_CHECKING([for custom python install directory]) AC_ARG_WITH([python-dir], AS_HELP_STRING([--with-python-dir], [the location to install Python modules. This path is relative starting from the prefix.]), [with_python_dir=$withval], [with_python_dir="no"]) AC_MSG_RESULT(${with_python_dir}) # Needed for installing Python modules during make install. python_mod_dir="${with_python_dir}" AC_SUBST(python_mod_dir) GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no) ]) dnl dnl Check to see if -Werror is disabled. dnl dnl --enable-werror/--disable-werror AC_DEFUN([GLIBCXX_ENABLE_WERROR], [ AC_MSG_CHECKING([for -Werror]) GLIBCXX_ENABLE(werror,$1,,[turns on -Werror]) AC_MSG_RESULT($enable_werror) GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes) ]) dnl dnl Check whether obsolescent tmpnam is available in <stdio.h>, dnl and define _GLIBCXX_USE_TMPNAM. dnl AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl dnl AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" dnl AC_CACHE_CHECK([for tmpnam], glibcxx_cv_TMPNAM, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <stdio.h>], [char *tmp = tmpnam(NULL);], [glibcxx_cv_TMPNAM=yes], [glibcxx_cv_TMPNAM=no]) ]) if test $glibcxx_cv_TMPNAM = yes; then AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.]) fi dnl CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check to see if sys/sdt.h exists and that it is suitable for use. dnl Some versions of sdt.h were not compatible with C++11. dnl AC_DEFUN([GLIBCXX_CHECK_SDT_H], [ # Note that this test has to be run with the C language. # Otherwise, sdt.h will try to include some headers from # libstdc++ itself. AC_LANG_SAVE AC_LANG_C AC_CACHE_CHECK([for suitable sys/sdt.h], glibcxx_cv_sys_sdt_h, [ # Because we have to run the test in C, we use grep rather # than the compiler to check for the bug. The bug is that # were strings without trailing whitespace, causing g++ # to look for operator"". The pattern searches for the fixed # output. AC_EGREP_CPP([ \",\" ], [ #include <sys/sdt.h> int f() { STAP_PROBE(hi, bob); } ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no]) ]) AC_LANG_RESTORE if test $glibcxx_cv_sys_sdt_h = yes; then AC_DEFINE(HAVE_SYS_SDT_H, 1, [Define to 1 if you have a suitable <sys/sdt.h> header file]) fi ]) dnl dnl Control whether the library should define symbols for old and new ABIs. dnl This affects definitions of strings, stringstreams and locale facets. dnl dnl --disable-libstdcxx-dual-abi will use old ABI for all types. dnl dnl Defines: dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0) dnl AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [ GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string]) if test x$enable_symvers = xgnu-versioned-namespace; then # gnu-versioned-namespace is incompatible with the dual ABI. enable_libstdcxx_dual_abi="no" fi if test x"$enable_libstdcxx_dual_abi" != xyes; then AC_MSG_NOTICE([dual ABI is disabled]) default_libstdcxx_abi="gcc4-compatible" fi GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes) ]) dnl dnl Check to see which ABI should be enabled by default. dnl dnl --with-default-libstdcxx-abi={gcc4-compatible,new} dnl dnl Defines: dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0) dnl AC_DEFUN([GLIBCXX_DEFAULT_ABI], [ if test x$enable_libstdcxx_dual_abi = xyes; then AC_MSG_CHECKING([for default std::string ABI to use]) AC_ARG_WITH([default-libstdcxx-abi], AS_HELP_STRING([--with-default-libstdcxx-abi], [set the std::string ABI to use by default]), [case "$withval" in gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;; new|cxx11) default_libstdcxx_abi="new" ;; c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;; *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;; esac ], [default_libstdcxx_abi="new"]) AC_MSG_RESULT(${default_libstdcxx_abi}) fi if test $default_libstdcxx_abi = "new"; then glibcxx_cxx11_abi=1 glibcxx_cxx98_abi=0 else glibcxx_cxx11_abi=0 glibcxx_cxx98_abi=1 fi AC_SUBST(glibcxx_cxx98_abi) GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1) ]) dnl dnl Check to see whether to build libstdc++fs.a dnl dnl --enable-libstdcxx-filesystem-ts dnl AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [ GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,, [turns on ISO/IEC TS 18822 support], [permit yes|no|auto]) AC_MSG_CHECKING([whether to build Filesystem TS support]) if test x"$ac_cv_header_dirent_h" != x"yes"; then enable_libstdcxx_filesystem_ts=no fi if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then case "${target_os}" in freebsd*|netbsd*|openbsd*|dragonfly*|darwin*) enable_libstdcxx_filesystem_ts=yes ;; gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*) enable_libstdcxx_filesystem_ts=yes ;; rtems*) enable_libstdcxx_filesystem_ts=yes ;; solaris*) enable_libstdcxx_filesystem_ts=yes ;; mingw*) enable_libstdcxx_filesystem_ts=yes ;; *) enable_libstdcxx_filesystem_ts=no ;; esac fi AC_MSG_RESULT($enable_libstdcxx_filesystem_ts) GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes) ]) dnl dnl Check whether the library calls required by the C++17 Filesystem library dnl and the Filesystem TS are present. dnl Defines: dnl HAVE_STRUCT_DIRENT_D_TYPE dnl _GLIBCXX_USE_REALPATH dnl _GLIBCXX_USE_UTIMENSAT dnl _GLIBCXX_USE_ST_MTIM dnl _GLIBCXX_USE_FCHMOD dnl _GLIBCXX_USE_FCHMODAT dnl _GLIBCXX_USE_COPY_FILE_RANGE dnl _GLIBCXX_USE_SENDFILE dnl HAVE_LINK dnl HAVE_LSEEK dnl HAVE_READLINK dnl HAVE_SYMLINK dnl AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl dnl AC_LANG_SAVE AC_LANG_CPLUSPLUS ac_save_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -fno-exceptions" dnl AC_CACHE_CHECK([for struct dirent.d_type], glibcxx_cv_dirent_d_type, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <dirent.h>], [ struct dirent d; if (sizeof d.d_type) return 0; ], [glibcxx_cv_dirent_d_type=yes], [glibcxx_cv_dirent_d_type=no]) ]) if test $glibcxx_cv_dirent_d_type = yes; then AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.]) fi dnl AC_CACHE_CHECK([for chmod], glibcxx_cv_chmod, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <sys/stat.h> ], [ int i = chmod("", S_IRUSR); ], [glibcxx_cv_chmod=yes], [glibcxx_cv_chmod=no]) ]) if test $glibcxx_cv_chmod = yes; then AC_DEFINE(_GLIBCXX_USE_CHMOD, 1, [Define if usable chmod is available in <sys/stat.h>.]) fi dnl AC_CACHE_CHECK([for mkdir], glibcxx_cv_mkdir, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <sys/stat.h> ], [ int i = mkdir("", S_IRUSR); ], [glibcxx_cv_mkdir=yes], [glibcxx_cv_mkdir=no]) ]) if test $glibcxx_cv_mkdir = yes; then AC_DEFINE(_GLIBCXX_USE_MKDIR, 1, [Define if usable mkdir is available in <sys/stat.h>.]) fi dnl AC_CACHE_CHECK([for chdir], glibcxx_cv_chdir, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <unistd.h> ], [ int i = chdir(""); ], [glibcxx_cv_chdir=yes], [glibcxx_cv_chdir=no]) ]) if test $glibcxx_cv_chdir = yes; then AC_DEFINE(_GLIBCXX_USE_CHDIR, 1, [Define if usable chdir is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for getcwd], glibcxx_cv_getcwd, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <unistd.h> ], [ char* s = getcwd((char*)0, 1); ], [glibcxx_cv_getcwd=yes], [glibcxx_cv_getcwd=no]) ]) if test $glibcxx_cv_getcwd = yes; then AC_DEFINE(_GLIBCXX_USE_GETCWD, 1, [Define if usable getcwd is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for realpath], glibcxx_cv_realpath, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <limits.h> #include <stdlib.h> #include <unistd.h> ], [ #if _XOPEN_VERSION < 500 #error #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX) char *tmp = realpath((const char*)NULL, (char*)NULL); #else #error #endif ], [glibcxx_cv_realpath=yes], [glibcxx_cv_realpath=no]) ]) if test $glibcxx_cv_realpath = yes; then AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.]) fi dnl AC_CACHE_CHECK([for utimensat], glibcxx_cv_utimensat, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <fcntl.h> #include <sys/stat.h> ], [ struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } }; int i = utimensat(AT_FDCWD, "path", ts, 0); ], [glibcxx_cv_utimensat=yes], [glibcxx_cv_utimensat=no]) ]) if test $glibcxx_cv_utimensat = yes; then AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.]) fi dnl AC_CACHE_CHECK([for utime], glibcxx_cv_utime, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <utime.h> ], [ struct utimbuf t = { 1, 1 }; int i = utime("path", &t); ], [glibcxx_cv_utime=yes], [glibcxx_cv_utime=no]) ]) if test $glibcxx_cv_utime = yes; then AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.]) fi dnl AC_CACHE_CHECK([for lstat], glibcxx_cv_lstat, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <sys/stat.h> ], [ struct stat st; int i = lstat("path", &st); ], [glibcxx_cv_lstat=yes], [glibcxx_cv_lstat=no]) ]) if test $glibcxx_cv_lstat = yes; then AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.]) fi dnl AC_CACHE_CHECK([for struct stat.st_mtim.tv_nsec], glibcxx_cv_st_mtim, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <sys/stat.h> ], [ struct stat st; return st.st_mtim.tv_nsec; ], [glibcxx_cv_st_mtim=yes], [glibcxx_cv_st_mtim=no]) ]) if test $glibcxx_cv_st_mtim = yes; then AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.]) fi dnl AC_CACHE_CHECK([for fchmod], glibcxx_cv_fchmod, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <sys/stat.h>], [fchmod(1, S_IWUSR);], [glibcxx_cv_fchmod=yes], [glibcxx_cv_fchmod=no]) ]) if test $glibcxx_cv_fchmod = yes; then AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.]) fi dnl AC_CACHE_CHECK([for fchmodat], glibcxx_cv_fchmodat, [dnl GCC_TRY_COMPILE_OR_LINK( [ #include <fcntl.h> #include <sys/stat.h> ], [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);], [glibcxx_cv_fchmodat=yes], [glibcxx_cv_fchmodat=no]) ]) if test $glibcxx_cv_fchmodat = yes; then AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.]) fi dnl AC_CACHE_CHECK([for link], glibcxx_cv_link, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [link("", "");], [glibcxx_cv_link=yes], [glibcxx_cv_link=no]) ]) if test $glibcxx_cv_link = yes; then AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for lseek], glibcxx_cv_lseek, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [lseek(1, 0, SEEK_SET);], [glibcxx_cv_lseek=yes], [glibcxx_cv_lseek=no]) ]) if test $glibcxx_cv_lseek = yes; then AC_DEFINE(HAVE_LSEEK, 1, [Define if lseek is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for readlink], glibcxx_cv_readlink, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [char buf[32]; readlink("", buf, sizeof(buf));], [glibcxx_cv_readlink=yes], [glibcxx_cv_readlink=no]) ]) if test $glibcxx_cv_readlink = yes; then AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for symlink], glibcxx_cv_symlink, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [symlink("", "");], [glibcxx_cv_symlink=yes], [glibcxx_cv_symlink=no]) ]) if test $glibcxx_cv_symlink = yes; then AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for truncate], glibcxx_cv_truncate, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [truncate("", 99);], [glibcxx_cv_truncate=yes], [glibcxx_cv_truncate=no]) ]) if test $glibcxx_cv_truncate = yes; then AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for copy_file_range that can copy files], glibcxx_cv_copy_file_range, [dnl case "${target_os}" in linux*) GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [copy_file_range(1, (loff_t*)nullptr, 2, (loff_t*)nullptr, 1, 0);], [glibcxx_cv_copy_file_range=yes], [glibcxx_cv_copy_file_range=no]) ;; *) glibcxx_cv_copy_file_range=no ;; esac ]) if test $glibcxx_cv_copy_file_range = yes; then AC_DEFINE(_GLIBCXX_USE_COPY_FILE_RANGE, 1, [Define if copy_file_range is available in <unistd.h>.]) fi dnl AC_CACHE_CHECK([for sendfile that can copy files], glibcxx_cv_sendfile, [dnl case "${target_os}" in gnu* | linux* | solaris* | uclinux*) GCC_TRY_COMPILE_OR_LINK( [#include <sys/sendfile.h>], [sendfile(1, 2, (off_t*)0, sizeof 1);], [glibcxx_cv_sendfile=yes], [glibcxx_cv_sendfile=no]) ;; *) glibcxx_cv_sendfile=no ;; esac ]) if test $glibcxx_cv_sendfile = yes && test $glibcxx_cv_lseek = yes; then AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.]) fi dnl AC_CACHE_CHECK([for fdopendir], glibcxx_cv_fdopendir, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <dirent.h>], [::DIR* dir = ::fdopendir(1);], [glibcxx_cv_fdopendir=yes], [glibcxx_cv_fdopendir=no]) ]) if test $glibcxx_cv_fdopendir = yes; then AC_DEFINE(HAVE_FDOPENDIR, 1, [Define if fdopendir is available in <dirent.h>.]) fi dnl AC_CACHE_CHECK([for dirfd], glibcxx_cv_dirfd, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <dirent.h>], [int fd = ::dirfd((::DIR*)0);], [glibcxx_cv_dirfd=yes], [glibcxx_cv_dirfd=no]) ]) if test $glibcxx_cv_dirfd = yes; then AC_DEFINE(HAVE_DIRFD, 1, [Define if dirfd is available in <dirent.h>.]) fi dnl AC_CACHE_CHECK([for openat], glibcxx_cv_openat, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <fcntl.h>], [int fd = ::openat(AT_FDCWD, "", 0);], [glibcxx_cv_openat=yes], [glibcxx_cv_openat=no]) ]) if test $glibcxx_cv_openat = yes; then AC_DEFINE(HAVE_OPENAT, 1, [Define if openat is available in <fcntl.h>.]) fi dnl AC_CACHE_CHECK([for unlinkat], glibcxx_cv_unlinkat, [dnl GCC_TRY_COMPILE_OR_LINK( [#include <fcntl.h> #include <unistd.h>], [::unlinkat(AT_FDCWD, "", AT_REMOVEDIR);], [glibcxx_cv_unlinkat=yes], [glibcxx_cv_unlinkat=no]) ]) if test $glibcxx_cv_unlinkat = yes; then AC_DEFINE(HAVE_UNLINKAT, 1, [Define if unlinkat is available in <fcntl.h>.]) fi dnl CXXFLAGS="$ac_save_CXXFLAGS" AC_LANG_RESTORE ]) dnl dnl Check how size_t is mangled. Copied from libitm. dnl AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [ AC_CACHE_CHECK([how size_t is mangled], glibcxx_cv_size_t_mangling, [ AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;], [glibcxx_cv_size_t_mangling=m], [ AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;], [glibcxx_cv_size_t_mangling=j], [ AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long long x;], [glibcxx_cv_size_t_mangling=y], [ AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned short x;], [glibcxx_cv_size_t_mangling=t], [ AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern __int20 unsigned x;], [glibcxx_cv_size_t_mangling=u6uint20], [glibcxx_cv_size_t_mangling=x]) ]) ]) ]) ]) ]) if test $glibcxx_cv_size_t_mangling = x; then AC_MSG_ERROR([Unknown underlying type for size_t]) fi AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling], [Define to the letter to which size_t is mangled.]) ]) dnl dnl Determine whether std::exception_ptr symbols should be exported with dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which dnl release first added support for std::exception_ptr. Originally it was dnl only supported for targets with always-lock-free atomics for int, but dnl since GCC 7.1 it is supported for all targets. dnl AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [ if test $enable_symvers != no; then AC_MSG_CHECKING([for first version to support std::exception_ptr]) case ${target} in aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \ m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* ) ac_exception_ptr_since_gcc46=yes ;; *) # If the value of this macro changes then we will need to hardcode # yes/no here for additional targets based on the original value. AC_TRY_COMPILE([], [ #if __GCC_ATOMIC_INT_LOCK_FREE <= 1 # error atomic int not always lock free #endif ], [ac_exception_ptr_since_gcc46=yes], [ac_exception_ptr_since_gcc46=no]) ;; esac if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1, [Define to 1 if GCC 4.6 supported std::exception_ptr for the target]) AC_MSG_RESULT([4.6.0]) else AC_MSG_RESULT([7.1.0]) fi fi ]) dnl dnl Check whether getentropy is present in <unistd.h>. dnl AC_DEFUN([GLIBCXX_CHECK_GETENTROPY], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_CACHE_CHECK([for getentropy], glibcxx_cv_getentropy, [ GCC_TRY_COMPILE_OR_LINK( [#include <unistd.h>], [unsigned i; ::getentropy(&i, sizeof(i));], [glibcxx_cv_getentropy=yes], [glibcxx_cv_getentropy=no]) ]) if test $glibcxx_cv_getentropy = yes; then AC_DEFINE(HAVE_GETENTROPY, 1, [Define if getentropy is available in <unistd.h>.]) fi AC_LANG_RESTORE ]) dnl dnl Check whether arc4random is present in <stdlib.h>. dnl AC_DEFUN([GLIBCXX_CHECK_ARC4RANDOM], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_CACHE_CHECK([for arc4random], glibcxx_cv_arc4random, [ GCC_TRY_COMPILE_OR_LINK( [#include <stdlib.h>], [unsigned i = ::arc4random();], [glibcxx_cv_arc4random=yes], [glibcxx_cv_arc4random=no]) ]) if test $glibcxx_cv_arc4random = yes; then AC_DEFINE(HAVE_ARC4RANDOM, 1, [Define if arc4random is available in <stdlib.h>.]) fi AC_LANG_RESTORE ]) dnl dnl Check to see whether to build libstdc++_libbacktrace.a dnl dnl --enable-libstdcxx-backtrace dnl AC_DEFUN([GLIBCXX_ENABLE_BACKTRACE], [ GLIBCXX_ENABLE(libstdcxx-backtrace,auto,, [turns on libbacktrace support], [permit yes|no|auto]) # Most of this is adapted from libsanitizer/configure.ac BACKTRACE_CPPFLAGS="-D_GNU_SOURCE" # libbacktrace only needs atomics for int, which we've already tested if test "$glibcxx_cv_atomic_int" = "yes"; then BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_ATOMIC_FUNCTIONS=1" fi # Test for __sync support. AC_CACHE_CHECK([__sync extensions], [glibcxx_cv_sys_sync], [GCC_TRY_COMPILE_OR_LINK( [int i;], [__sync_bool_compare_and_swap (&i, i, i); __sync_lock_test_and_set (&i, 1); __sync_lock_release (&i);], [glibcxx_cv_sys_sync=yes], [glibcxx_cv_sys_sync=no]) ]) if test "$glibcxx_cv_sys_sync" = "yes"; then BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_SYNC_FUNCTIONS=1" fi # Check for dl_iterate_phdr. AC_CHECK_HEADERS(link.h) if test "$ac_cv_header_link_h" = "no"; then have_dl_iterate_phdr=no else # When built as a GCC target library, we can't do a link test. ac_save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE" AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes], [have_dl_iterate_phdr=no]) CPPFLAGS="$ac_save_CPPFLAGS" fi if test "$have_dl_iterate_phdr" = "yes"; then BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_DL_ITERATE_PHDR=1" fi AC_CHECK_HEADERS(windows.h) AC_CHECK_HEADERS(tlhelp32.h, [], [], [#ifdef HAVE_WINDOWS_H # include <windows.h> #endif ]) # Check for the fcntl function. if test -n "${with_target_subdir}"; then case "${host}" in *-*-mingw*) have_fcntl=no ;; *) have_fcntl=yes ;; esac else AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no]) fi if test "$have_fcntl" = "yes"; then BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_FCNTL=1" fi AC_CHECK_DECLS(strnlen) # Check for getexecname function. if test -n "${with_target_subdir}"; then case "${host}" in *-*-solaris2*) have_getexecname=yes ;; *) have_getexecname=no ;; esac else AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no]) fi if test "$have_getexecname" = "yes"; then BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_GETEXECNAME=1" fi # The library needs to be able to read the executable itself. Compile # a file to determine the executable format. The awk script # filetype.awk prints out the file type. AC_CACHE_CHECK([output filetype], [glibcxx_cv_sys_filetype], [filetype= AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([int i;], [int j;])], [filetype=`${AWK} -f $srcdir/../libbacktrace/filetype.awk conftest.$ac_objext`], [AC_MSG_FAILURE([compiler failed])]) glibcxx_cv_sys_filetype=$filetype]) # Match the file type to decide what files to compile. FORMAT_FILE= case "$glibcxx_cv_sys_filetype" in elf*) FORMAT_FILE="elf.lo" ;; pecoff*) FORMAT_FILE="pecoff.lo" ;; *) AC_MSG_WARN([could not determine output file type]) FORMAT_FILE="unknown.lo" enable_libstdcxx_backtrace=no ;; esac AC_SUBST(FORMAT_FILE) # ELF defines. elfsize= case "$glibcxx_cv_sys_filetype" in elf32) elfsize=32 ;; elf64) elfsize=64 ;; esac BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DBACKTRACE_ELF_SIZE=$elfsize" AC_MSG_CHECKING([whether to build libbacktrace support]) if test "$enable_libstdcxx_backtrace" = "auto"; then case "$host" in avr-*-*) enable_libstdcxx_backtrace=no ;; *) enable_libstdcxx_backtrace="$is_hosted" ;; esac fi AC_MSG_RESULT($enable_libstdcxx_backtrace) if test "$enable_libstdcxx_backtrace" = "yes"; then BACKTRACE_SUPPORTED=1 AC_CHECK_HEADERS(sys/mman.h) case "${host}" in *-*-msdosdjgpp) # DJGPP has sys/man.h, but no mmap have_mmap=no ;; *-*-*) have_mmap="$ac_cv_header_sys_mman_h" ;; esac if test "$have_mmap" = "no"; then VIEW_FILE=read.lo ALLOC_FILE=alloc.lo else VIEW_FILE=mmapio.lo AC_PREPROC_IFELSE([AC_LANG_SOURCE([ #include <sys/mman.h> #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON) #error no MAP_ANONYMOUS #endif ])], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo]) fi AC_SUBST(VIEW_FILE) AC_SUBST(ALLOC_FILE) BACKTRACE_USES_MALLOC=0 if test "$ALLOC_FILE" = "alloc.lo"; then BACKTRACE_USES_MALLOC=1 fi if test "$ac_has_gthreads" = "yes"; then BACKTRACE_SUPPORTS_THREADS=1 else BACKTRACE_SUPPORTS_THREADS=0 fi AC_SUBST(BACKTRACE_CPPFLAGS) AC_SUBST(BACKTRACE_SUPPORTED) AC_SUBST(BACKTRACE_USES_MALLOC) AC_SUBST(BACKTRACE_SUPPORTS_THREADS) AC_DEFINE(HAVE_STACKTRACE, 1, [Define if the <stacktrace> header is supported.]) else BACKTRACE_SUPPORTED=0 BACKTRACE_USES_MALLOC=0 BACKTRACE_SUPPORTS_THREADS=0 fi GLIBCXX_CONDITIONAL(ENABLE_BACKTRACE, [test "$enable_libstdcxx_backtrace" = yes]) ]) dnl dnl Allow the emergency EH pool to be configured. dnl dnl --enable-libstdcxx-static-eh-pool will cause a fixed-size static buffer dnl to be used for allocating exceptions after malloc fails. The default is dnl to allocate a buffer using malloc dnl dnl --with-libstdcxx-eh-pool-obj-count=N will set the default size for the dnl buffer. For a static buffer that size is fixed permanently. For a dynamic dnl buffer it's the default, but it can be overridden from the environment. dnl dnl To set the default to approximately the same values as GCC 12, dnl use --with-libstdcxx-eh-pool-obj-count=94 for 32-bit targets, dnl and --with-libstdcxx-eh-pool-obj-count=252 for 64-bit targets. dnl dnl Defines: dnl _GLIBCXX_EH_POOL_STATIC if a fixed-size static buffer should be used dnl instead of allocating a buffer on startup. dnl _GLIBCXX_EH_POOL_NOBJS to override the default EMERGENCY_OBJ_COUNT value. dnl AC_DEFUN([GLIBCXX_EMERGENCY_EH_ALLOC], [ eh_pool_static= eh_pool_nobjs= AC_ARG_ENABLE([libstdcxx-static-eh-pool], AC_HELP_STRING([--enable-libstdcxx-static-eh-pool], [use a fixed-size static buffer for allocating exceptions if malloc fails]), [if test "${enableval}" = yes; then eh_pool_static="-D_GLIBCXX_EH_POOL_STATIC" AC_MSG_NOTICE([EH pool using static buffer]) fi],) AC_ARG_WITH([libstdcxx-eh-pool-obj-count], AC_HELP_STRING([--with-libstdcxx-eh-pool-obj-count], [the number of exceptions that can be allocated from the pool if malloc fails]), [if test "${withval}" -ge 0 2>/dev/null; then eh_pool_obj_count="-D_GLIBCXX_EH_POOL_NOBJS=${withval}" AC_MSG_NOTICE([EH pool object count: ${withval}]) else AC_MSG_ERROR([EH pool obj count must be a non-negative integer: $withval]) fi],) EH_POOL_FLAGS="$eh_pool_static $eh_pool_obj_count" AC_SUBST(EH_POOL_FLAGS) ]) dnl dnl Allow the location of tzdata files to be configured. dnl dnl --with-libstdcxx-zoneinfo=ARG where ARG can be: dnl DIR - use DIR/tzdata.zi and DIR/leapseconds files. dnl static - use static copy of tzdata.zi embedded in the library. dnl DIR,static - use DIR, but use embedded static copy as fallback. dnl yes - equivalent to DIR,static with a system-specific value for DIR. dnl no - disable most tzdb functionality. dnl dnl Defines: dnl _GLIBCXX_ZONEINFO_DIR if std::chrono::tzdb should use the specified dnl directory for the tzdata.zi and leapseconds files. dnl _GLIBCXX_STATIC_TZDATA if std::chrono::tzdb should use an embedded dnl static copy of the tzdata.zi file. dnl AC_DEFUN([GLIBCXX_ZONEINFO_DIR], [ AC_ARG_WITH([libstdcxx-zoneinfo], AC_HELP_STRING([--with-libstdcxx-zoneinfo], [the location to use for tzdata]), [],[with_libstdcxx_zoneinfo=yes]) if test "x${with_libstdcxx_zoneinfo}" = xyes; then # Pick a default when no specific path is set. case "$target_os" in gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) # Not all distros ship tzdata.zi in this dir. zoneinfo_dir="/usr/share/zoneinfo" ;; aix*) # Binary tzfile files are in /usr/share/lib/zoneinfo # but tzdata.zi is not present there. zoneinfo_dir=none ;; darwin2*) # Binary tzfile files are in /usr/share/lib/zoneinfo.default # but tzdata.zi is not present there. zoneinfo_dir=none ;; *) # Binary tzfile files are commonly found in /usr/share/zoneinfo # but tzdata.zi is not present there. zoneinfo_dir=none ;; esac AC_COMPUTE_INT(glibcxx_cv_at_least_32bit, [__INTPTR_WIDTH__ >= 32]) if test "$glibcxx_cv_at_least_32bit" -ne 0; then # Also embed a copy of the tzdata.zi file as a static string. embed_zoneinfo=yes else # The embedded data is too large for 16-bit targets. embed_zoneinfo=no fi elif test "x${with_libstdcxx_zoneinfo}" = xno; then # Disable tzdb support completely. zoneinfo_dir=none embed_zoneinfo=no else case "${with_libstdcxx_zoneinfo}" in static) # Do not attempt to read from disk, always use embedded data. zoneinfo_dir=none embed_zoneinfo=yes ;; static,* | *,static) # Try to read from disk, use embedded data as fallback. zoneinfo_dir="${with_libstdcxx_zoneinfo#static,}" zoneinfo_dir="${with_libstdcxx_zoneinfo%,static}" embed_zoneinfo=yes ;; *) zoneinfo_dir="${with_libstdcxx_zoneinfo}" embed_zoneinfo=no ;; esac fi AC_MSG_NOTICE([zoneinfo data directory: ${zoneinfo_dir}]) if test "x${zoneinfo_dir}" != xnone; then AC_DEFINE_UNQUOTED(_GLIBCXX_ZONEINFO_DIR, "${zoneinfo_dir}", [Define if a directory should be searched for tzdata files.]) if $GLIBCXX_IS_NATIVE && ! test -f "$zoneinfo_dir/tzdata.zi"; then AC_MSG_WARN("$zoneinfo_dir does not contain tzdata.zi file") fi fi GLIBCXX_CONDITIONAL(USE_STATIC_TZDATA, test "${embed_zoneinfo}" = yes) if test "x${embed_zoneinfo}" = xyes; then AC_MSG_NOTICE([static tzdata.zi file will be compiled into the library]) AC_DEFINE_UNQUOTED(_GLIBCXX_STATIC_TZDATA, 1, [Define if static tzdata should be compiled into the library.]) fi ]) dnl dnl Check whether lock tables can be aligned to avoid false sharing. dnl dnl Defines: dnl _GLIBCXX_CAN_ALIGNAS_DESTRUCTIVE_SIZE if objects with static storage dnl duration can be aligned to std::hardware_destructive_interference_size. dnl AC_DEFUN([GLIBCXX_CHECK_ALIGNAS_CACHELINE], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_MSG_CHECKING([whether static objects can be aligned to the cacheline size]) AC_TRY_COMPILE(, [struct alignas(__GCC_DESTRUCTIVE_SIZE) Aligned { }; alignas(Aligned) static char buf[sizeof(Aligned) * 16]; ], [ac_alignas_cacheline=yes], [ac_alignas_cacheline=no]) if test "$ac_alignas_cacheline" = yes; then AC_DEFINE_UNQUOTED(_GLIBCXX_CAN_ALIGNAS_DESTRUCTIVE_SIZE, 1, [Define if global objects can be aligned to std::hardware_destructive_interference_size.]) fi AC_MSG_RESULT($ac_alignas_cacheline) AC_LANG_RESTORE ]) dnl dnl Check whether iostream initialization should be done in the library, dnl using the init_priority attribute. dnl dnl Defines: dnl _GLIBCXX_USE_INIT_PRIORITY_ATTRIBUTE if GCC supports the init_priority dnl attribute for the target. dnl AC_DEFUN([GLIBCXX_CHECK_INIT_PRIORITY], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_MSG_CHECKING([whether init_priority attribute is supported]) AC_TRY_COMPILE(, [ #if ! __has_attribute(init_priority) #error init_priority not supported #endif ], [ac_init_priority=yes], [ac_init_priority=no]) if test "$ac_init_priority" = yes; then AC_DEFINE_UNQUOTED(_GLIBCXX_USE_INIT_PRIORITY_ATTRIBUTE, 1, [Define if init_priority should be used for iostream initialization.]) fi AC_MSG_RESULT($ac_init_priority) AC_LANG_RESTORE ]) dnl dnl Check whether the Windows CRT function _get_osfhandle is available. dnl dnl Defines: dnl _GLIBCXX_USE__GET_OSFHANDLE if _get_osfhandle is in <io.h> for Windows. dnl AC_DEFUN([GLIBCXX_CHECK_FILEBUF_NATIVE_HANDLES], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_MSG_CHECKING([whether _get_osfhandle is defined in <io.h>]) AC_TRY_COMPILE([ #if defined(_WIN32) && !defined(__CYGWIN__) # include <stdint.h> # include <stdio.h> # include <io.h> #endif ],[ FILE* file = 0; int fd = fileno(file); intptr_t crt_handle = _get_osfhandle(fd); void* win32_handle = reinterpret_cast<void*>(crt_handle); ], [ac_get_osfhandle=yes], [ac_get_osfhandle=no]) if test "$ac_get_osfhandle" = yes; then AC_DEFINE_UNQUOTED(_GLIBCXX_USE__GET_OSFHANDLE, 1, [Define if _get_osfhandle should be used for filebuf::native_handle().]) fi AC_MSG_RESULT($ac_get_osfhandle) AC_LANG_RESTORE ]) dnl dnl Check whether the dependencies for std::text_encoding are available. dnl dnl Defines: dnl _GLIBCXX_USE_NL_LANGINFO_L if nl_langinfo_l is in <langinfo.h>. dnl AC_DEFUN([GLIBCXX_CHECK_TEXT_ENCODING], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_MSG_CHECKING([whether nl_langinfo_l is defined in <langinfo.h>]) AC_TRY_COMPILE([ #include <locale.h> #if __has_include(<xlocale.h>) # include <xlocale.h> #endif #include <langinfo.h> ],[ locale_t loc = newlocale(LC_ALL_MASK, "", (locale_t)0); const char* enc = nl_langinfo_l(CODESET, loc); freelocale(loc); ], [ac_nl_langinfo_l=yes], [ac_nl_langinfo_l=no]) AC_MSG_RESULT($ac_nl_langinfo_l) if test "$ac_nl_langinfo_l" = yes; then AC_DEFINE_UNQUOTED(_GLIBCXX_USE_NL_LANGINFO_L, 1, [Define if nl_langinfo_l should be used for std::text_encoding.]) fi AC_LANG_RESTORE ]) # Macros from the top-level gcc directory. m4_include([../config/gc++filt.m4]) m4_include([../config/tls.m4]) m4_include([../config/gthr.m4]) m4_include([../config/cet.m4])