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- 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])
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