dnl Process this file with autoconf to produce a configure script. sinclude(../config/enable.m4) sinclude(../config/tls.m4) sinclude(../config/toolexeclibdir.m4) sinclude(../config/acx.m4) sinclude(../config/no-executables.m4) sinclude(../config/lib-ld.m4) sinclude(../config/override.m4) sinclude(../config/picflag.m4) sinclude(../config/dfp.m4) sinclude(../config/unwind_ipinfo.m4) sinclude(../config/gthr.m4) sinclude(../config/sjlj.m4) sinclude(../config/cet.m4) AC_INIT([GNU C Runtime Library], 1.0,,[libgcc]) AC_CONFIG_SRCDIR([static-object.mk]) # The libgcc should not depend on any header files AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS], [m4_divert_text([DEFAULTS], [ac_includes_default='/* none */'])]) AC_ARG_WITH(target-subdir, [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target]) AC_ARG_WITH(cross-host, [ --with-cross-host=HOST Configuring with a cross compiler]) AC_ARG_WITH(ld, [ --with-ld arrange to use the specified ld (full pathname)]) if test "${srcdir}" = "."; then if test -n "${with_build_subdir}"; then libgcc_topdir="${srcdir}/../.." with_target_subdir= elif test -z "${with_target_subdir}"; then libgcc_topdir="${srcdir}/.." else if test "${with_target_subdir}" != "."; then libgcc_topdir="${srcdir}/${with_multisrctop}../.." else libgcc_topdir="${srcdir}/${with_multisrctop}.." fi fi else libgcc_topdir="${srcdir}/.." fi AC_SUBST(libgcc_topdir) AC_CONFIG_AUX_DIR($libgcc_topdir) AC_CONFIG_HEADER(auto-target.h:config.in) AC_ARG_ENABLE(shared, [ --disable-shared don't provide a shared libgcc], [ case $enable_shared in yes | no) ;; *) enable_shared=no IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:," for pkg in $enableval; do if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then enable_shared=yes fi done IFS="$ac_save_ifs" ;; esac ], [enable_shared=yes]) AC_SUBST(enable_shared) AC_ARG_ENABLE(vtable-verify, [ --enable-vtable-verify Enable vtable verification feature ], [case "$enableval" in yes) enable_vtable_verify=yes ;; no) enable_vtable_verify=no ;; *) enable_vtable_verify=no;; esac], [enable_vtable_verify=no]) AC_SUBST(enable_vtable_verify) AC_ARG_WITH(aix-soname, [AS_HELP_STRING([--with-aix-soname=aix|svr4|both], [shared library versioning (aka "SONAME") variant to provide on AIX])], [case "${host}:${enable_shared}" in power*-*-aix[[5-9]]*:yes) AC_MSG_CHECKING([which variant of shared library versioning to provide for shared libgcc]) case ${withval} in aix|svr4|both) ;; *) AC_MSG_ERROR([Unknown argument to --with-aix-soname]);; esac AC_MSG_RESULT($withval) ;; *) with_aix_soname=aix ;; esac ], [with_aix_soname=aix]) AC_SUBST(with_aix_soname) GCC_PICFLAG AC_SUBST(PICFLAG) AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) AC_ARG_ENABLE(version-specific-runtime-libs, [ --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 AC_ARG_WITH(slibdir, [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]], slibdir="$with_slibdir", [if test "${version_specific_libs}" = yes; then slibdir='$(libsubdir)' elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then case ${with_toolexeclibdir} in no) slibdir='$(exec_prefix)/$(host_noncanonical)/lib' ;; *) slibdir=${with_toolexeclibdir} ;; esac else slibdir='$(libdir)' fi]) AC_SUBST(slibdir) # Command-line options. # Very limited version of AC_MAINTAINER_MODE. AC_ARG_ENABLE([maintainer-mode], [AC_HELP_STRING([--enable-maintainer-mode], [enable make rules and dependencies not useful (and sometimes confusing) to the casual installer])], [case ${enable_maintainer_mode} in yes) MAINT='' ;; no) MAINT='#' ;; *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;; esac maintainer_mode=${enableval}], [MAINT='#']) AC_SUBST([MAINT])dnl AC_PROG_INSTALL AC_PROG_AWK # We need awk; bail out if it's missing. case ${AWK} in "") AC_MSG_ERROR([can't build without awk, bailing out]) ;; esac AC_CANONICAL_HOST ACX_NONCANONICAL_HOST ACX_NONCANONICAL_TARGET GCC_TOPLEV_SUBDIRS AC_ARG_ENABLE(gcov, [ --disable-gcov don't provide libgcov and related host tools], [], [case $target in bpf-*-*) enable_gcov=no ;; *) enable_gcov=yes ;; esac]) AC_SUBST(enable_gcov) # Calculate toolexeclibdir # Also toolexecdir, though it's only used in toolexeclibdir case ${version_specific_libs} in yes) # Need the gcc compiler version to know where to install libraries # and header files if --enable-version-specific-runtime-libs option # is selected. toolexecdir='$(libdir)/gcc/$(target_noncanonical)' toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' ;; no) if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then # Install a library built with a cross compiler in tooldir, not libdir. toolexecdir='$(exec_prefix)/$(target_noncanonical)' case ${with_toolexeclibdir} in no) toolexeclibdir='$(toolexecdir)/lib' ;; *) toolexeclibdir=${with_toolexeclibdir} ;; esac else toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)' toolexeclibdir='$(libdir)' fi multi_os_directory=`$CC -print-multi-os-directory` case $multi_os_directory in .) ;; # Avoid trailing /. *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; esac ;; esac AC_SUBST(toolexecdir) AC_SUBST(toolexeclibdir) dnl These must be called before AM_PROG_LIBTOOL, because it may want dnl to call AC_CHECK_PROG. AC_CHECK_TOOL(AR, ar) AC_CHECK_TOOL(LIPO, lipo, :) AC_CHECK_TOOL(NM, nm) AC_CHECK_TOOL(RANLIB, ranlib, :) AC_CHECK_TOOL(STRIP, strip, :) AC_PROG_LN_S GCC_NO_EXECUTABLES AC_PROG_CC AC_PROG_CPP_WERROR AC_SYS_LARGEFILE AC_CHECK_SIZEOF([double]) AC_CHECK_SIZEOF([long double]) AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8]) AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8]) AC_SUBST(double_type_size) AC_SUBST(long_double_type_size) AC_CHECK_HEADERS(inttypes.h stdint.h stdlib.h ftw.h \ unistd.h sys/stat.h sys/types.h \ string.h strings.h memory.h sys/auxv.h sys/mman.h) AC_HEADER_STDC # Check for decimal float support. AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include ]], [[ _Decimal32 x; int fe_except = FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT; ]])], [libgcc_cv_dfp=yes], [libgcc_cv_dfp=no])]) decimal_float=$libgcc_cv_dfp AC_SUBST(decimal_float) GCC_AC_ENABLE_DECIMAL_FLOAT([$host]) # Check for fixed-point support. AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point], [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_Sat _Fract x;])], [libgcc_cv_fixed_point=yes], [libgcc_cv_fixed_point=no])]) fixed_point=$libgcc_cv_fixed_point AC_SUBST(fixed_point) # For platforms with the unwind ABI which includes an unwind library, # libunwind, we can choose to use the system libunwind. # config.gcc also contains tests of with_system_libunwind. GCC_CHECK_UNWIND_GETIPINFO # Check if the compiler is configured for setjmp/longjmp exceptions. GCC_CHECK_SJLJ_EXCEPTIONS GCC_CET_FLAGS(CET_FLAGS) AC_SUBST(CET_FLAGS) AC_ARG_ENABLE([explicit-exception-frame-registration], [AC_HELP_STRING([--enable-explicit-exception-frame-registration], [register exception tables explicitly at module start, for use e.g. for compatibility with installations without PT_GNU_EH_FRAME support])], [ force_explicit_eh_registry= if test "$enable_explicit_exception_frame_registration" = yes; then if test $ac_cv_sjlj_exceptions = yes; then AC_MSG_ERROR([Can't --enable-explicit-exception-frame-registration with setjmp/longjmp exceptions]) fi force_explicit_eh_registry=-DUSE_EH_FRAME_REGISTRY_ALWAYS fi ]) AC_SUBST([force_explicit_eh_registry]) AC_ARG_ENABLE([tm-clone-registry], [ --disable-tm-clone-registry disable TM clone registry], [ use_tm_clone_registry= if test "$enable_tm_clone_registry" = no; then use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0 fi ], [ use_tm_clone_registry= case $target in msp430*elfbare) use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0 ;; esac ]) AC_SUBST([use_tm_clone_registry]) AC_LIB_PROG_LD_GNU AC_MSG_CHECKING([for thread model used by GCC]) target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` AC_MSG_RESULT([$target_thread_file]) # Check for assembler CFI support. AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi], [AC_COMPILE_IFELSE( [AC_LANG_SOURCE([asm("\n\ .text\n\ .cfi_startproc\n\ .cfi_personality 0, symbol\n\ .cfi_endproc");])], [libgcc_cv_cfi=yes], [libgcc_cv_cfi=no])]) # Check 32bit or 64bit. In the case of MIPS, this really determines the # word size rather than the address size. cat > conftest.c <], [glibc_version_major=0]) AC_COMPUTE_INT([glibc_version_minor], [__GLIBC_MINOR__], [#include ], [glibc_version_minor=0])]) AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor]) # Determine floating-point type for powerpc*-*-linux* or vxworks7*. # Single-precision-only FPRs are not a supported configuration for # this target, so are not allowed for in this test. case ${host} in powerpc*-*-linux* | powerpc*-*-vxworks7*) cat > conftest.c < exception and rounding mode handling, so # make libgcc's versions into compat symbols if a recent enough glibc # version is being used. ppc_fp_compat= case ${ppc_fp_type} in soft|e500v1|e500v2) if test $glibc_version_major -gt 2 \ || ( test $glibc_version_major -eq 2 \ && test $glibc_version_minor -ge 19 ); then ppc_fp_compat="t-softfp-compat" fi ;; esac ;; esac case ${host} in # At present, we cannot turn -mfloat128 on via #pragma GCC target, so just # check if we have VSX (ISA 2.06) support to build the software libraries, and # whether the assembler can handle xsaddqp for hardware support. Also check if # a new glibc is being used so that __builtin_cpu_supports can be used. powerpc*-*-linux*) saved_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128" AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries], [libgcc_cv_powerpc_float128], [AC_COMPILE_IFELSE( [AC_LANG_SOURCE([vector double dadd (vector double a, vector double b) { return a + b; }])], [libgcc_cv_powerpc_float128=yes], [libgcc_cv_powerpc_float128=no])]) CFLAGS="$CFLAGS -mcpu=power9 -mfloat128-hardware" AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries], [libgcc_cv_powerpc_float128_hw], [AC_COMPILE_IFELSE( [AC_LANG_SOURCE([#include #ifndef AT_PLATFORM #error "AT_PLATFORM is not defined" #endif #ifndef __BUILTIN_CPU_SUPPORTS__ #error "__builtin_cpu_supports is not available" #endif vector unsigned char add (vector unsigned char a, vector unsigned char b) { vector unsigned char ret; __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b)); return ret; } void *add_resolver (void) { return (void *) add; } __float128 add_ifunc (__float128, __float128) __attribute__ ((__ifunc__ ("add_resolver")));])], [libgcc_cv_powerpc_float128_hw=yes], [libgcc_cv_powerpc_float128_hw=no])]) CFLAGS="$saved_CFLAGS" saved_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -mcpu=power10 -mfloat128-hardware" AC_CACHE_CHECK([for PowerPC ISA 3.1 to build hardware __float128 libraries], [libgcc_cv_powerpc_3_1_float128_hw], [AC_COMPILE_IFELSE( [AC_LANG_SOURCE([#include #ifndef AT_PLATFORM #error "AT_PLATFORM is not defined" #endif #ifndef __BUILTIN_CPU_SUPPORTS__ #error "__builtin_cpu_supports is not available" #endif vector unsigned char conv (vector unsigned char qs) { vector unsigned char ret; __asm__ ("xscvsqqp %0,%1" : "=v" (ret) : "v" (qs)); return ret; } void *conv_resolver (void) { return (void *) conv; } __float128 conv_ifunc (__float128) __attribute__ ((__ifunc__ ("conv_resolver")));])], [libgcc_cv_powerpc_3_1_float128_hw=yes], [libgcc_cv_powerpc_3_1_float128_hw=no])]) CFLAGS="$saved_CFLAGS" esac # Collect host-machine-specific information. . ${srcdir}/config.host # Used for constructing correct paths for offload compilers. accel_dir_suffix= real_host_noncanonical=${host_noncanonical} if test x"$enable_as_accelerator_for" != x; then accel_dir_suffix=/accel/${target_noncanonical} real_host_noncanonical=${enable_as_accelerator_for} fi AC_SUBST(accel_dir_suffix) AC_SUBST(real_host_noncanonical) if test x"$enable_offload_targets" != x; then extra_parts="${extra_parts} crtoffloadbegin.o crtoffloadend.o crtoffloadtable.o" fi # Check if Solaris/x86 linker supports ZERO terminator unwind entries. # This is after config.host so we can augment tmake_file. # Link with -nostartfiles -nodefaultlibs since neither are present while # building libgcc. case ${host} in i?86-*-solaris2* | x86_64-*-solaris2*) cat > conftest.s <&AS_MESSAGE_LOG_FD); then tmake_file="${tmake_file} i386/t-crtstuff" fi ;; esac # Check if Solaris linker support v2 linker mapfile syntax. # Link with -nostartfiles -nodefaultlibs since neither are present while # building libgcc. case ${host} in *-*-solaris2*) solaris_ld_v2_maps=no echo 'int main(void) {return 0;}' > conftest.c echo '$mapfile_version 2' > conftest.map if AC_TRY_COMMAND([${CC-cc} -nostartfiles -nodefaultlibs -Wl,-M,conftest.map -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then solaris_ld_v2_maps=yes fi ;; esac AC_SUBST(solaris_ld_v2_maps) # Check if xtensa target is configured for windowed ABI and thus needs to use # custom unwind code. # This is after config.host so we can augment tmake_file. case ${host} in xtensa*-*) AC_COMPILE_IFELSE([AC_LANG_SOURCE( [#ifdef __XTENSA_CALL0_ABI__ #error #endif ])], [tmake_file="${tmake_file} xtensa/t-windowed"]) ;; esac # Check for visibility support. 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AC_CACHE_CHECK([for .cfi_sections .debug_frame], libgcc_cv_cfi_sections_directive, [ echo 'int foo (int, char *);' > conftest.c echo 'int bar (int x) { char *y = __builtin_alloca (x); return foo (x + 1, y) + 1; }' >> conftest.c libgcc_cv_cfi_sections_directive=no if AC_TRY_COMMAND(${CC-cc} -Werror -g -fno-asynchronous-unwind-tables -fno-unwind-tables -fno-exceptions -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then if grep "\\.cfi_sections.*\\.debug_frame" conftest.s >/dev/null; then libgcc_cv_cfi_sections_directive=yes fi fi rm -f conftest.* ]) if test $libgcc_cv_cfi_sections_directive = yes; then AC_DEFINE(HAVE_AS_CFI_SECTIONS, 1, [Define to 1 if the assembler supports .cfi_sections .debug_frame directive.]) fi # See if we have thread-local storage. We can only test assembler # since link-time and run-time tests require the newly built # gcc, which can't be used to build executable due to that libgcc # is yet to be built here. GCC_CHECK_CC_TLS set_have_cc_tls= if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then set_have_cc_tls="-DHAVE_CC_TLS" fi AC_SUBST(set_have_cc_tls) # See if we have emulated thread-local storage. GCC_CHECK_EMUTLS set_use_emutls= if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then set_use_emutls="-DUSE_EMUTLS" fi AC_SUBST(set_use_emutls) dnl Check if as supports AVX instructions. AC_DEFUN([LIBGCC_CHECK_AS_AVX], [ case "${target}" in i[[34567]]86-*-* | x86_64-*-*) AC_CACHE_CHECK([if the assembler supports AVX], libgcc_cv_as_avx, [ AC_TRY_COMPILE([], [asm("vzeroupper");], [libgcc_cv_as_avx=yes], [libgcc_cv_as_avx=no]) ]) if test x$libgcc_cv_as_avx = xyes; then AC_DEFINE(HAVE_AS_AVX, 1, [Define to 1 if the assembler supports AVX.]) fi ;; esac]) LIBGCC_CHECK_AS_AVX dnl Check if as supports LSE instructions. AC_DEFUN([LIBGCC_CHECK_AS_LSE], [ case "${target}" in aarch64*-*-*) AC_CACHE_CHECK([if the assembler supports LSE], libgcc_cv_as_lse, [ AC_TRY_COMPILE([], changequote(,)dnl asm(".arch armv8-a+lse\n\tcas w0, w1, [x2]"); changequote([,])dnl , [libgcc_cv_as_lse=yes], [libgcc_cv_as_lse=no]) ]) if test x$libgcc_cv_as_lse = xyes; then AC_DEFINE(HAVE_AS_LSE, 1, [Define to 1 if the assembler supports LSE.]) fi ;; esac]) LIBGCC_CHECK_AS_LSE dnl Check if as supports .variant_pcs. AC_DEFUN([LIBGCC_CHECK_AS_VARIANT_PCS], [ case "${target}" in aarch64*-*-*) AC_CACHE_CHECK([if as supports .variant_pcs], libgcc_cv_as_variant_pcs, [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [[asm (".variant_pcs foobar");]])], [libgcc_cv_as_variant_pcs=yes], [libgcc_cv_as_variant_pcs=no]) ]) if test x$libgcc_cv_as_variant_pcs = xyes; then AC_DEFINE(HAVE_AS_VARIANT_PCS, 1, [Define to 1 if the assembler supports .variant_pcs.]) fi ;; esac]) LIBGCC_CHECK_AS_VARIANT_PCS # Check __getauxval ABI symbol for CPU feature detection. case ${target} in aarch64*-linux-*) # No link check because the libc may not be present. AC_CACHE_CHECK([for __getauxval], [libgcc_cv_have___getauxval], [case ${target} in *-linux-gnu*) libgcc_cv_have___getauxval=yes ;; *) libgcc_cv_have___getauxval=no esac]) if test x$libgcc_cv_have___getauxval = xyes; then AC_DEFINE(HAVE___GETAUXVAL, 1, [Define to 1 if __getauxval is available.]) fi esac dnl Check if as supports RTM instructions. AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [[void ip (void) __attribute__ ((constructor (1)));]])], [libgcc_cv_init_priority=yes],[libgcc_cv_init_priority=no])]) if test $libgcc_cv_init_priority = yes; then AC_DEFINE(HAVE_INIT_PRIORITY, 1, [Define if the compiler supports init priority.]) fi # Conditionalize the sfp-machine.h header for this target machine. if test -z "${sfp_machine_header}"; then sfp_machine_header=$cpu_type/sfp-machine.h if test -f ${srcdir}/config/${sfp_machine_header}; then : else sfp_machine_header=no-sfp-machine.h fi fi AC_SUBST(sfp_machine_header) # Conditionalize the makefile for this target machine. tmake_file_= for f in ${tmake_file} do if test -f ${srcdir}/config/$f then tmake_file_="${tmake_file_} \$(srcdir)/config/$f" fi done tmake_file="${tmake_file_}" AC_SUBST(tmake_file) # Likewise export definitions for libgcc_tm.h tm_file_= for f in ${tm_file} do tm_file_="${tm_file_} \$(srcdir)/config/$f" done tm_file="${tm_file_}" AC_SUBST(tm_file) AC_SUBST(tm_defines) # Map from thread model to thread header. GCC_AC_THREAD_HEADER([$target_thread_file]) AC_CACHE_CHECK([for strub support], [libgcc_cv_strub_support], [AC_COMPILE_IFELSE( [AC_LANG_SOURCE([void __attribute__ ((__strub__)) fn (void) {}])], [libgcc_cv_strub_support=yes], [libgcc_cv_strub_support=no])]) if test "x$libgcc_cv_strub_support" != xno; then HAVE_STRUB_SUPPORT= else HAVE_STRUB_SUPPORT='# ' fi AC_SUBST(HAVE_STRUB_SUPPORT) # Determine what GCC version number to use in filesystem paths. GCC_BASE_VER # Substitute configuration variables AC_SUBST(cpu_type) AC_SUBST(extra_parts) AC_SUBST(asm_hidden_op) AC_SUBST(enable_execute_stack) AC_SUBST(unwind_header) AC_SUBST(md_unwind_def_header) AC_SUBST(md_unwind_header) AC_SUBST(sfp_machine_header) AC_SUBST(thread_header) # We need multilib support. AC_CONFIG_FILES([Makefile]) AC_CONFIG_COMMANDS([default], [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h if test -n "$CONFIG_FILES"; then # FIXME: We shouldn't need to set ac_file ac_file=Makefile . ${libgcc_topdir}/config-ml.in fi]], [[srcdir=${srcdir} host=${host} with_target_subdir=${with_target_subdir} with_multisubdir=${with_multisubdir} ac_configure_args="--enable-multilib ${ac_configure_args}" CONFIG_SHELL=${CONFIG_SHELL-/bin/sh} libgcc_topdir=${libgcc_topdir} CC="${CC}" ]]) AC_OUTPUT