diff options
Diffstat (limited to 'sysdeps/x86_64/configure.ac')
| -rw-r--r-- | sysdeps/x86_64/configure.ac | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sysdeps/x86_64/configure.ac b/sysdeps/x86_64/configure.ac index d34f9a8..9138f63 100644 --- a/sysdeps/x86_64/configure.ac +++ b/sysdeps/x86_64/configure.ac @@ -75,6 +75,21 @@ LIBC_TRY_CC_OPTION([-mno-vzeroupper], ]) LIBC_CONFIG_VAR([config-cflags-novzeroupper], [$libc_cv_cc_novzeroupper]) +dnl Check whether asm supports Intel MPX +AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl +cat > conftest.s <<\EOF + bndmov %bnd0,(%rsp) +EOF +if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then + libc_cv_asm_mpx=yes +else + libc_cv_asm_mpx=no +fi +rm -f conftest*]) +if test $libc_cv_asm_mpx == yes; then + AC_DEFINE(HAVE_MPX_SUPPORT) +fi + dnl It is always possible to access static and hidden symbols in an dnl position independent way. AC_DEFINE(PI_STATIC_AND_HIDDEN) |