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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 ca8b6bfcc..a84123317 100644 --- a/config/always-compiler-options.m4 +++ b/config/always-compiler-options.m4 @@ -87,6 +87,27 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION], [ AC_SUBST([NO_FORMAT_TRUNCATION]) ]) +dnl # +dnl # Check if gcc supports -Wno-format-truncation option. +dnl # +AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH], [ + AC_MSG_CHECKING([whether $CC supports -Wno-format-zero-length]) + + saved_flags="$CFLAGS" + CFLAGS="$CFLAGS -Werror -Wno-format-zero-length" + + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ + NO_FORMAT_ZERO_LENGTH=-Wno-format-zero-length + AC_MSG_RESULT([yes]) + ], [ + NO_FORMAT_ZERO_LENGTH= + AC_MSG_RESULT([no]) + ]) + + CFLAGS="$saved_flags" + AC_SUBST([NO_FORMAT_ZERO_LENGTH]) +]) + dnl # dnl # Check if gcc supports -Wno-bool-compare option. |