47 lines
1.3 KiB
Plaintext
47 lines
1.3 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
|
|
# Local configure fragment for sysdeps/x86.
|
|
|
|
if test x"$enable_cet" = xyes; then
|
|
# Check if CET can be enabled.
|
|
AC_CACHE_CHECK(whether CET can be enabled,
|
|
libc_cv_x86_cet_available, [dnl
|
|
cat > conftest.c <<EOF
|
|
#if !defined __CET__ || __CET__ != 3
|
|
# error CET isn't available.
|
|
#endif
|
|
EOF
|
|
if AC_TRY_COMMAND(${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 $libc_cv_x86_cet_available = yes; then
|
|
enable_cet=yes
|
|
else
|
|
if test x"$enable_cet" = xdefault; then
|
|
enable_cet=no
|
|
else
|
|
AC_MSG_ERROR([$CC doesn't support CET])
|
|
fi
|
|
fi
|
|
fi
|
|
if test $enable_cet = yes; then
|
|
# Check if assembler supports CET.
|
|
AC_CACHE_CHECK(whether $AS supports CET,
|
|
libc_cv_x86_cet_as, [dnl
|
|
cat > conftest.s <<EOF
|
|
incsspd %ecx
|
|
EOF
|
|
if AC_TRY_COMMAND(${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
|
|
LIBC_CONFIG_VAR([enable-cet], [$enable_cet])
|