mirror of git://sourceware.org/git/glibc.git
138 lines
4.3 KiB
Plaintext
138 lines
4.3 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/x86_64.
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dnl Check if -mprefer-vector-width=128 works.
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LIBC_TRY_CC_AND_TEST_CC_OPTION([for -mprefer-vector-width=128],
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[-mprefer-vector-width=128],
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libc_cv_cc_mprefer_vector_width,
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[libc_cv_cc_mprefer_vector_width=yes],
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[libc_cv_cc_mprefer_vector_width=no],
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libc_cv_test_cc_mprefer_vector_width,
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[libc_cv_test_cc_mprefer_vector_width=yes],
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[libc_cv_test_cc_mprefer_vector_width=no])
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LIBC_CONFIG_VAR([config-cflags-mprefer-vector-width],
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[$libc_cv_cc_mprefer_vector_width])
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LIBC_LINKER_FEATURE([-z mark-plt], [-Wl,-z,mark-plt, -Wl,--fatal-warnings],
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[libc_cv_z_mark_plt=yes], [libc_cv_z_mark_plt=no])
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LIBC_CONFIG_VAR([have-z-mark-plt], [$libc_cv_z_mark_plt])
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if test x"$build_mathvec" = xnotset; then
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build_mathvec=yes
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fi
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test_enable_cet=$enable_cet
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if test $enable_cet != no; then
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# Check if CET can be enabled.
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conftest_code="
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#if !defined __CET__ || __CET__ != 3
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# error CET is not available.
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#endif
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"
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LIBC_TRY_CC_AND_TEST_CC_COMMAND([whether CET can be enabled],
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[$conftest_code],
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[-c -fcf-protection -include cet.h],
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libc_cv_x86_cet_available,
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[libc_cv_x86_cet_available=yes],
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[libc_cv_x86_cet_available=no],
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libc_cv_test_x86_cet_available,
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[libc_cv_test_x86_cet_available=yes],
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[libc_cv_test_x86_cet_available=no])
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test_enable_cet=$libc_cv_test_x86_cet_available
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if test $libc_cv_x86_cet_available != yes; then
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AC_MSG_ERROR([$CC doesn't support CET])
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fi
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fi
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if test $enable_cet != no; then
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# Check if assembler supports CET.
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AC_CACHE_CHECK(whether assembler supports CET,
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libc_cv_x86_cet_as, [dnl
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cat > conftest.s <<EOF
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incsspd %ecx
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s -o conftest.o 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_x86_cet_as=yes
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else
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libc_cv_x86_cet_as=no
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fi
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rm -rf conftest*])
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if test $libc_cv_x86_cet_as = no; then
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AC_MSG_ERROR([$AS doesn't support CET])
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fi
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fi
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if test $enable_cet = yes; then
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AC_DEFINE(DEFAULT_DL_X86_CET_CONTROL, cet_elf_property)
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elif test $enable_cet = permissive; then
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AC_DEFINE(DEFAULT_DL_X86_CET_CONTROL, cet_permissive)
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fi
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LIBC_CONFIG_VAR([enable-cet], [$enable_cet])
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dnl Check if compiler supports -msse2avx
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AC_CACHE_CHECK(-msse2avx, libc_cv_cc_msse2avx, [dnl
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LIBC_TRY_CC_OPTION([-msse2avx],
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[libc_cv_cc_msse2avx=-msse2avx],
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[libc_cv_cc_msse2avx=])
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])
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LIBC_CONFIG_VAR([config-cflags-msse2avx],
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[$libc_cv_cc_msse2avx])
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# Check if -mamx-tile works properly.
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LIBC_TRY_TEST_CC_COMMAND([whether -mamx-tile works properly],
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[#include <x86intrin.h>],
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[-E -mamx-tile],
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libc_cv_test_x86_have_amx_tile,
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[
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if test $libc_cv_test_clang = yes; then
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libc_cv_test_x86_have_amx_tile=yes
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else
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if grep -q __builtin_ia32_ldtilecfg conftest; then
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libc_cv_test_x86_have_amx_tile=yes
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else
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libc_cv_test_x86_have_amx_tile=no
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fi
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fi
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],
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[libc_cv_test_x86_have_amx_tile=no])
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LIBC_CONFIG_VAR([have-mamx-tile], [$libc_cv_test_x86_have_amx_tile])
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# Check if -mapxf is enabled.
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AC_CACHE_CHECK(whether -mapxf is enabled,
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libc_cv_x86_have_apx, [dnl
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cat > conftest.c <<EOF
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#ifndef __APX_F__
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# error APX isn't enabled
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#endif
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EOF
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libc_cv_x86_have_apx=no
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_x86_have_apx=yes
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fi
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rm -rf conftest*])
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if test $libc_cv_x86_have_apx = yes; then
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AC_DEFINE(HAVE_X86_APX)
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fi
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LIBC_CONFIG_VAR([have-x86-apx], [$libc_cv_x86_have_apx])
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dnl Check if compiler standard library provides __sfp_handle_exceptions, used on
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dnl float128 implementation.
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AC_CACHE_CHECK(whether compiler standard library provides __sfp_handle_exceptions,
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libc_cv_sfp_handle_exceptions, [dnl
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cat > conftest.c <<EOF
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int _start (void) { return 0; }
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int __start (void) { return 0; }
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void __sfp_handle_exceptions (int);
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int main (void) { __sfp_handle_exceptions (0); return 0; }
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EOF
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if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $no_ssp -o conftest conftest.c -static -nostartfiles 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_sfp_handle_exceptions=yes
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else
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libc_cv_sfp_handle_exceptions=no
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fi
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rm -rf conftest*])
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if test x"$libc_cv_sfp_handle_exceptions" == xyes; then
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AC_DEFINE(HAVE_X86_64_SFP_HANDLE_EXCEPTIONS)
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fi
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test -n "$critic_missing" && AC_MSG_ERROR([
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*** $critic_missing])
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