diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/attributes.m4 | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4 index fa379a2fe..f71b3d0d0 100644 --- a/m4/attributes.m4 +++ b/m4/attributes.m4 @@ -188,6 +188,14 @@ AC_DEFUN([CC_ATTRIBUTE_PACKED], [ [$2]) ]) +AC_DEFUN([CC_ATTRIBUTE_CONST], [ + CC_CHECK_ATTRIBUTE( + [const], , + [int __attribute__((const)) twopow(int n) { return 1 << n; } ], + [$1], + [$2]) +]) + AC_DEFUN([CC_FLAG_VISIBILITY], [ AC_REQUIRE([CC_CHECK_WERROR]) AC_CACHE_CHECK([if $CC supports -fvisibility=hidden], |