Fix GCC_UNUSED definition to actually work with -Wunused-parameter

Silences warnings of:
charset.c: In function ‘IdentityRecode’:
charset.c:42:51: warning: unused parameter ‘self’ [-Wunused-parameter]
charset.c: In function ‘NullReverse’:
charset.c:84:26: warning: unused parameter ‘n’ [-Wunused-parameter]
charset.c:84:59: warning: unused parameter ‘self’ [-Wunused-parameter]
other.c: In function ‘mapping_utf8’:
other.c:108:44: warning: unused parameter ‘s’ [-Wunused-parameter]
other.c: In function ‘reverse_utf8’:
other.c:114:44: warning: unused parameter ‘s’ [-Wunused-parameter]
luit.c: In function ‘sigwinchHandler’:
luit.c:463:21: warning: unused parameter ‘sig’ [-Wunused-parameter]
luit.c: In function ‘sigchldHandler’:
luit.c:470:20: warning: unused parameter ‘sig’ [-Wunused-parameter]
luit.c: In function ‘parent’:
luit.c:657:12: warning: unused parameter ‘pid’ [-Wunused-parameter]

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/other.h b/other.h
index 9d814a3..d18b586 100644
--- a/other.h
+++ b/other.h
@@ -26,7 +26,11 @@ THE SOFTWARE.
 #include "config.h"		/* include this, for self-contained headers */
 
 #ifndef GCC_UNUSED
-#define GCC_UNUSED		/* ARGSUSED */
+# if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)
+#  define GCC_UNUSED		__attribute__((__unused__))
+# else
+#  define GCC_UNUSED		/* ARGSUSED */
+# endif
 #endif
 
 #include <X11/fonts/fontenc.h>