diff options
Diffstat (limited to 'sys/contrib/openzfs/config/always-compiler-options.m4')
| -rw-r--r-- | sys/contrib/openzfs/config/always-compiler-options.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/config/always-compiler-options.m4 b/sys/contrib/openzfs/config/always-compiler-options.m4 index 37fa079e0f4c..0e96435e3713 100644 --- a/sys/contrib/openzfs/config/always-compiler-options.m4 +++ b/sys/contrib/openzfs/config/always-compiler-options.m4 @@ -210,6 +210,27 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_CLOBBERED], [ ]) dnl # +dnl # Check if cc supports -Wno-atomic-alignment option. +dnl # +AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_ATOMIC_ALIGNMENT], [ + AC_MSG_CHECKING([whether $CC supports -Wno-atomic-alignment]) + + saved_flags="$CFLAGS" + CFLAGS="$CFLAGS -Werror -Wno-atomic-alignment" + + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ + NO_ATOMIC_ALIGNMENT=-Wno-atomic-alignment + AC_MSG_RESULT([yes]) + ], [ + NO_ATOMIC_ALIGNMENT= + AC_MSG_RESULT([no]) + ]) + + CFLAGS="$saved_flags" + AC_SUBST([NO_ATOMIC_ALIGNMENT]) +]) + +dnl # dnl # Check if cc supports -Wimplicit-fallthrough option. dnl # AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_IMPLICIT_FALLTHROUGH], [ |