From 2d4a7a4cf645c9cb586cf2f77f8d3f61d6c71883 Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Thu, 10 Nov 2011 23:45:57 -0800
Subject: XORG_TESTSET_CFLAG: Add support fot
 -Werror=unused-command-line-argument

This warning was was added to clang in r144365

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
---
 xorg-macros.m4.in | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

(limited to 'xorg-macros.m4.in')

diff --git a/xorg-macros.m4.in b/xorg-macros.m4.in
index 5b56d96..ed908e2 100644
--- a/xorg-macros.m4.in
+++ b/xorg-macros.m4.in
@@ -1445,7 +1445,8 @@ AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"])
 #
 # Note that this does not guarantee that the compiler supports the flag as some
 # compilers will simply ignore arguments that they do not understand, but we do
-# attempt to weed out false positives by using -Werror=unknown-warning-option
+# attempt to weed out false positives by using -Werror=unknown-warning-option and
+# -Werror=unused-command-line-argument
 #
 AC_DEFUN([XORG_TESTSET_CFLAG], [
 AC_REQUIRE([AC_PROG_CC_C99])
@@ -1464,15 +1465,32 @@ if test "x$xorg_testset_unknown_warning_option" = "x" ; then
 	CFLAGS="$xorg_testset_save_CFLAGS"
 fi
 
+if test "x$xorg_testset_unused_command_line_argument" = "x" ; then
+	if test "x$xorg_testset_unknown_warning_option" = "xyes" ; then
+		CFLAGS="$CFLAGS -Werror=unknown-warning-option"
+	fi
+	CFLAGS="$CFLAGS -Werror=unused-command-line-argument"
+	AC_MSG_CHECKING([if $CC supports -Werror=unused-command-line-argument])
+	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
+	                  [xorg_testset_unused_command_line_argument=yes],
+	                  [xorg_testset_unused_command_line_argument=no])
+	AC_MSG_RESULT([$xorg_testset_unused_command_line_argument])
+	CFLAGS="$xorg_testset_save_CFLAGS"
+fi
+
 found="no"
 m4_foreach([flag], m4_cdr($@), [
 	if test $found = "no" ; then
 		if test "x$xorg_testset_unknown_warning_option" = "xyes" ; then
-			CFLAGS="$CFLAGS -Werror=unknown-warning-option ]flag["
-		else
-			CFLAGS="$CFLAGS ]flag["
+			CFLAGS="$CFLAGS -Werror=unknown-warning-option"
+		fi
+
+		if test "x$xorg_testset_unused_command_line_argument" = "xyes" ; then
+			CFLAGS="$CFLAGS -Werror=unused-command-line-argument"
 		fi
 
+		CFLAGS="$CFLAGS ]flag["
+
 		AC_MSG_CHECKING([if $CC supports ]flag[])
 		AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
 		                  [supported=yes], [supported=no])
-- 
cgit v1.2.3