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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.
AC_CACHE_CHECK(-mprefer-vector-width=128, libc_cv_cc_mprefer_vector_width, [dnl
LIBC_TRY_CC_OPTION([-mprefer-vector-width=128],
[libc_cv_cc_mprefer_vector_width=yes],
[libc_cv_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
if test $enable_cet != no; then
# Check if CET can be enabled.
AC_CACHE_CHECK(whether CET can be enabled,
libc_cv_x86_cet_available, [dnl
cat > conftest.c <<EOF
#if !defined __CET__ || __CET__ != 3
# error CET isn't available.
#endif
EOF
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS -fcf-protection -include cet.h conftest.c 1>&AS_MESSAGE_LOG_FD); then
libc_cv_x86_cet_available=yes
else
libc_cv_x86_cet_available=no
fi
rm -rf conftest*])
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])
test -n "$critic_missing" && AC_MSG_ERROR([
*** $critic_missing])
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