Merged revisions 151240 via svnmerge from
[asterisk/asterisk.git] / autoconf / ast_gcc_attribute.m4
1 # Helper function to check for gcc attributes.
2 # AST_GCC_ATTRIBUTE([attribute name])
3
4 AC_DEFUN([AST_GCC_ATTRIBUTE],
5 [
6 AC_MSG_CHECKING(for compiler 'attribute $1' support)
7 saved_CFLAGS="$CFLAGS"
8 CFLAGS="$CFLAGS -Werror"
9 AC_COMPILE_IFELSE(
10         AC_LANG_PROGRAM([static void __attribute__(($1)) *test(void *muffin, ...) {}],
11                         []),
12         AC_MSG_RESULT(yes)
13         AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
14         AC_MSG_RESULT(no))
15 ]
16 CFLAGS="$saved_CFLAGS"
17 )