mirror of
https://github.com/gcc-mirror/gcc.git
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121 lines
3.3 KiB
Plaintext
121 lines
3.3 KiB
Plaintext
AC_INIT([LTO plugin for ld], 0.1,,[lto-plugin])
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AC_CANONICAL_SYSTEM
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GCC_TOPLEV_SUBDIRS
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AM_INIT_AUTOMAKE([foreign no-dist])
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AM_MAINTAINER_MODE
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AC_ARG_WITH(libiberty,
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[AS_HELP_STRING([--with-libiberty=PATH],
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[specify the directory where to find libiberty [../libiberty]])],
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[], with_libiberty=../libiberty)
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AC_SUBST(with_libiberty)
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AC_USE_SYSTEM_EXTENSIONS
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AC_PROG_CC
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AC_SYS_LARGEFILE
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ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_lto_plugin_warn_cflags])
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# Check whether -static-libgcc is supported.
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saved_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -static-libgcc"
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AC_MSG_CHECKING([for -static-libgcc])
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AC_LINK_IFELSE([AC_LANG_SOURCE([
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int main() {}])], [have_static_libgcc=yes], [have_static_libgcc=no])
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AC_MSG_RESULT($have_static_libgcc);
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LDFLAGS="$saved_LDFLAGS"
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# Need -Wc to get it through libtool.
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if test "x$have_static_libgcc" = xyes; then
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ac_lto_plugin_ldflags="-Wc,-static-libgcc"
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fi
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AC_SUBST(ac_lto_plugin_ldflags)
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GCC_CET_HOST_FLAGS(CET_HOST_FLAGS)
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AC_SUBST(CET_HOST_FLAGS)
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if test x"$host_subdir" = x.; then
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gcc_build_dir=../gcc
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else
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gcc_build_dir=../../$host_subdir/gcc
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fi
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AC_SUBST(gcc_build_dir)
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# Used for constructing correct paths for offload compilers.
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accel_dir_suffix=
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real_target_noncanonical=${target_noncanonical}
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if test x"$enable_as_accelerator_for" != x; then
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accel_dir_suffix=/accel/${target_noncanonical}
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real_target_noncanonical=${enable_as_accelerator_for}
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fi
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AC_SUBST(accel_dir_suffix)
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AC_SUBST(real_target_noncanonical)
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# Determine what GCC version number to use in filesystem paths.
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GCC_BASE_VER
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AC_MSG_CHECKING([whether symbol versioning is supported])
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lto_plugin_use_symver=no
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if test x$gcc_no_link = xyes; then
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# If we cannot link, we cannot build shared libraries, so do not use
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# symbol versioning.
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lto_plugin_use_symver=no
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else
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
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cat > conftest.map <<EOF
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{
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global: *foo*; bar; local: *;
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};
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EOF
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AC_TRY_LINK([int foo;],[],[lto_plugin_use_symver=gnu],[lto_plugin_use_symver=no])
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if test x$lto_plugin_use_symver = xno; then
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case "$target_os" in
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solaris2*)
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LDFLAGS="$save_LDFLAGS"
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LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
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# Sun ld cannot handle wildcards and treats all entries as undefined.
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cat > conftest.map <<EOF
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{
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global: foo; local: *;
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};
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EOF
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AC_TRY_LINK([int foo;],[],[lto_plugin_use_symver=sun],[lto_plugin_use_symver=no])
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;;
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esac
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fi
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LDFLAGS="$save_LDFLAGS"
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fi
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AC_MSG_RESULT($lto_plugin_use_symver)
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AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER, [test "x$lto_plugin_use_symver" != xno])
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AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER_GNU, [test "x$lto_plugin_use_symver" = xgnu])
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AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER_SUN, [test "x$lto_plugin_use_symver" = xsun])
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# Check for thread headers.
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use_locking=no
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ac_lto_plugin_extra_ldflags=
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case $host in
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riscv*)
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# do not use locking as pthread depends on libatomic
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;;
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*-linux*)
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use_locking=yes
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;;
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esac
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if test x$use_locking = xyes; then
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AC_CHECK_HEADER(pthread.h,
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[AC_DEFINE(HAVE_PTHREAD_LOCKING, 1, [Define if the system provides pthread locking mechanism.])])
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ac_lto_plugin_extra_ldflags="-pthread"
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fi
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AC_SUBST(ac_lto_plugin_extra_ldflags)
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AM_PROG_LIBTOOL
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ACX_LT_HOST_FLAGS
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AC_SUBST(target_noncanonical)
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AC_TYPE_INT64_T
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AC_TYPE_UINT64_T
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AC_HEADER_SYS_WAIT
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AC_CONFIG_FILES(Makefile)
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AC_CONFIG_HEADERS(config.h)
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AC_OUTPUT
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