<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.32.2"> </HEAD> <BODY> On Tue, 2011-11-01 at 13:16 -0700, Jeremy Huddleston wrote: <BLOCKQUOTE TYPE=CITE> <PRE> The current test was always failing to compile because 'return 0;' was global rather than in the body of a function. Signed-off-by: Jeremy Huddleston <<A HREF="mailto:jeremyhu@apple.com">jeremyhu@apple.com</A>> --- xorg-macros.m4.in | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/xorg-macros.m4.in b/xorg-macros.m4.in index 0527dfe..3b02190 100644 --- a/xorg-macros.m4.in +++ b/xorg-macros.m4.in @@ -1431,7 +1431,7 @@ if test "x$GCC" = xyes ; then AC_MSG_CHECKING([if $CC supports -Werror=attributes]) save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $STRICT_CFLAGS -Werror=attributes" - AC_COMPILE_IFELSE([AC_LANG_SOURCE([return 0;])], + AC_COMPILE_IFELSE([AC_LANG_SOURCE([], [return 0;])], [STRICT_CFLAGS="$STRICT_CFLAGS -Werror=attributes" AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])]) </PRE> </BLOCKQUOTE> I used AC_LANG_PROGRAM and the generated test is: <BLOCKQUOTE> <PRE> int main () { return 0;   ;   return 0; } </PRE> </BLOCKQUOTE> Is this what you were expecting? Using AC_LANG_PROGRAM([],[]) produces: <BLOCKQUOTE> <PRE> int main () {   ;   return 0; } </PRE> </BLOCKQUOTE> Is that closer to what you want? I did not experience the compile failure inititally. </BODY> </HTML>