diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/attributes.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4 index 55f34c9f7..a74280696 100644 --- a/m4/attributes.m4 +++ b/m4/attributes.m4 @@ -322,3 +322,26 @@ AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [ [Define the highest alignment supported]) fi ]) + +AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [ + AC_REQUIRE([CC_CHECK_WERROR]) + ac_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $cc_cv_werror" + AC_CACHE_CHECK([if compiler supports __attribute__((deprecated))], + [cc_cv_attribute_alias], + [AC_COMPILE_IFELSE([ + void some_function(void) __attribute__((deprecated)); + ], + [cc_cv_attribute_deprecated=yes], + [cc_cv_attribute_deprecated=no]) + ]) + CFLAGS="$ac_save_CFLAGS" + + if test "x$cc_cv_attribute_deprecated" = "xyes"; then + AC_DEFINE([SUPPORT_ATTRIBUTE_DEPRECATED], 1, [Define this if the compiler supports the deprecated attribute]) + $1 + else + true + $2 + fi +]) |