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Diffstat (limited to 'config/always-compiler-options.m4')
| -rw-r--r-- | config/always-compiler-options.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/config/always-compiler-options.m4 b/config/always-compiler-options.m4 index f903655fa..ca8b6bfcc 100644 --- a/config/always-compiler-options.m4 +++ b/config/always-compiler-options.m4 @@ -160,3 +160,24 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER], [ CFLAGS="$saved_flags" AC_SUBST([NO_OMIT_FRAME_POINTER]) ]) + +dnl # +dnl # Check if cc supports -fno-ipa-sra option. +dnl # +AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA], [ + AC_MSG_CHECKING([whether $CC supports -fno-ipa-sra]) + + saved_flags="$CFLAGS" + CFLAGS="$CFLAGS -Werror -fno-ipa-sra" + + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ + NO_IPA_SRA=-fno-ipa-sra + AC_MSG_RESULT([yes]) + ], [ + NO_IPA_SRA= + AC_MSG_RESULT([no]) + ]) + + CFLAGS="$saved_flags" + AC_SUBST([NO_IPA_SRA]) +]) |