From: msweet <msweet@a1ca3aef-8c08-0410-bb20-df032aa958be>
Date: Tue, 23 Jun 2015 14:48:53 +0000 (+0000)
Subject: Add a check for whether the compiler supports the -Wno-unused-result option.
X-Git-Tag: v2.2b1~253
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e87e23e76e9d133ce78e3ee56f2a60a2453875ae;p=thirdparty%2Fcups.git

Add a check for whether the compiler supports the -Wno-unused-result option.


git-svn-id: svn+ssh://src.apple.com/svn/cups/cups.org/trunk@12742 a1ca3aef-8c08-0410-bb20-df032aa958be
---

diff --git a/config-scripts/cups-compiler.m4 b/config-scripts/cups-compiler.m4
index 5f92d8b68d..3c2076aa1b 100644
--- a/config-scripts/cups-compiler.m4
+++ b/config-scripts/cups-compiler.m4
@@ -154,7 +154,16 @@ if test -n "$GCC"; then
 
 	if test "x$with_optim" = x; then
 		# Add useful warning options for tracking down problems...
-		OPTIM="-Wall -Wno-format-y2k -Wunused -Wno-unused-result $OPTIM"
+		OPTIM="-Wall -Wno-format-y2k -Wunused $OPTIM"
+
+		AC_MSG_CHECKING(whether compiler supports -Wno-unused-result)
+		OLDCFLAGS="$CFLAGS"
+		CFLAGS="$CFLAGS -Werror -Wno-unused-result"
+		AC_TRY_COMPILE(,,
+			[OPTIM="$OPTIM -Wno-unused-result"
+			AC_MSG_RESULT(yes)],
+			AC_MSG_RESULT(no))
+		CFLAGS="$OLDCFLAGS"
 
 		AC_MSG_CHECKING(whether compiler supports -Wsign-conversion)
 		OLDCFLAGS="$CFLAGS"