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Diffstat (limited to 'autoconf/ast_gcc_attribute.m4')
| -rw-r--r-- | autoconf/ast_gcc_attribute.m4 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/autoconf/ast_gcc_attribute.m4 b/autoconf/ast_gcc_attribute.m4 new file mode 100644 index 000000000..d47d375e6 --- /dev/null +++ b/autoconf/ast_gcc_attribute.m4 @@ -0,0 +1,17 @@ +# Helper function to check for gcc attributes. +# AST_GCC_ATTRIBUTE([attribute name]) + +AC_DEFUN([AST_GCC_ATTRIBUTE], +[ +AC_MSG_CHECKING(for compiler 'attribute $1' support) +saved_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Werror" +AC_COMPILE_IFELSE( + AC_LANG_PROGRAM([static void __attribute__(($1)) *test(void *muffin, ...) {}], + []), + AC_MSG_RESULT(yes) + AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]), + AC_MSG_RESULT(no)) +] +CFLAGS="$saved_CFLAGS" +) |