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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/x86_64.
dnl Check if -mprefer-vector-width=128 works.
LIBC_TRY_CC_AND_TEST_CC_OPTION([for -mprefer-vector-width=128],
[-mprefer-vector-width=128],
libc_cv_cc_mprefer_vector_width,
[libc_cv_cc_mprefer_vector_width=yes],
[libc_cv_cc_mprefer_vector_width=no],
libc_cv_test_cc_mprefer_vector_width,
[libc_cv_test_cc_mprefer_vector_width=yes],
[libc_cv_test_cc_mprefer_vector_width=no])
LIBC_CONFIG_VAR([config-cflags-mprefer-vector-width],
[$libc_cv_cc_mprefer_vector_width])
LIBC_LINKER_FEATURE([-z mark-plt], [-Wl,-z,mark-plt],
[libc_cv_z_mark_plt=yes], [libc_cv_z_mark_plt=no])
LIBC_CONFIG_VAR([have-z-mark-plt], [$libc_cv_z_mark_plt])
if test x"$build_mathvec" = xnotset; then
build_mathvec=yes
fi
test_enable_cet=$enable_cet
if test $enable_cet != no; then
# Check if CET can be enabled.
conftest_code="
#if !defined __CET__ || __CET__ != 3
# error CET is not available.
#endif
"
LIBC_TRY_CC_AND_TEST_CC_COMMAND([whether CET can be enabled],
[$conftest_code],
[-c -fcf-protection -include cet.h],
libc_cv_x86_cet_available,
[libc_cv_x86_cet_available=yes],
[libc_cv_x86_cet_available=no],
libc_cv_test_x86_cet_available,
[libc_cv_test_x86_cet_available=yes],
[libc_cv_test_x86_cet_available=no])
test_enable_cet=$libc_cv_test_x86_cet_available
if test $libc_cv_x86_cet_available != yes; then
AC_MSG_ERROR([$CC doesn't support CET])
fi
fi
if test $enable_cet != no; then
# Check if assembler supports CET.
AC_CACHE_CHECK(whether assembler supports CET,
libc_cv_x86_cet_as, [dnl
cat > conftest.s <<EOF
incsspd %ecx
EOF
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s -o conftest.o 1>&AS_MESSAGE_LOG_FD); then
libc_cv_x86_cet_as=yes
else
libc_cv_x86_cet_as=no
fi
rm -rf conftest*])
if test $libc_cv_x86_cet_as = no; then
AC_MSG_ERROR([$AS doesn't support CET])
fi
fi
if test $enable_cet = yes; then
AC_DEFINE(DEFAULT_DL_X86_CET_CONTROL, cet_elf_property)
elif test $enable_cet = permissive; then
AC_DEFINE(DEFAULT_DL_X86_CET_CONTROL, cet_permissive)
fi
LIBC_CONFIG_VAR([enable-cet], [$enable_cet])
# Check if -mamx-tile works properly.
LIBC_TRY_TEST_CC_COMMAND([whether -mamx-tile works properly],
[#include <x86intrin.h>],
[-E -mamx-tile],
libc_cv_test_x86_have_amx_tile,
[
if test $libc_cv_test_clang = yes; then
libc_cv_test_x86_have_amx_tile=yes
else
if grep -q __builtin_ia32_ldtilecfg conftest; then
libc_cv_test_x86_have_amx_tile=yes
else
libc_cv_test_x86_have_amx_tile=no
fi
fi
],
[libc_cv_test_x86_have_amx_tile=no])
LIBC_CONFIG_VAR([have-mamx-tile], [$libc_cv_test_x86_have_amx_tile])
# Check if -mapxf is enabled.
AC_CACHE_CHECK(whether -mapxf is enabled,
libc_cv_x86_have_apx, [dnl
cat > conftest.c <<EOF
#ifndef __APX_F__
# error APX isn't enabled
#endif
EOF
libc_cv_x86_have_apx=no
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD); then
libc_cv_x86_have_apx=yes
fi
rm -rf conftest*])
if test $libc_cv_x86_have_apx = yes; then
AC_DEFINE(HAVE_X86_APX)
fi
LIBC_CONFIG_VAR([have-x86-apx], [$libc_cv_x86_have_apx])
test -n "$critic_missing" && AC_MSG_ERROR([
*** $critic_missing])
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