Only add GCC diagnostic pragmas when compiler is GCC compatible

Avoid "unknown pragma" warnings on other compilers.

Signed-off-by: Ran Benita <ran@unusedvar.com>

scripts/makekeys

@@ -17,8 +17,10 @@ print('''
 entry_offsets = {}
 
 print('''
+#ifdef __GNUC__
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Woverlength-strings"
+#endif
 static const char *keysym_names =
 '''.strip())
 offs = 0
@@ -28,7 +30,9 @@ for (name, _) in sorted(entries, key=lambda e: e[0].lower()):
     offs += len(name) + 1
 print('''
 ;
+#ifdef __GNUC__
 #pragma GCC diagnostic pop
+#endif
 '''.strip())
 
 print('''

src/ks_tables.h

@@ -5,8 +5,10 @@
  * https://raw.github.com/xkbcommon/libxkbcommon/master/src/ks_tables.h
  */
 
+#ifdef __GNUC__
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Woverlength-strings"
+#endif
 static const char *keysym_names =
     "0\0"
     "1\0"
@@ -2417,7 +2419,9 @@ static const char *keysym_names =
     "Zstroke\0"
     "zstroke\0"
 ;
+#ifdef __GNUC__
 #pragma GCC diagnostic pop
+#endif
 
 struct name_keysym {
     xkb_keysym_t keysym;

test/log.c

@@ -26,7 +26,9 @@
 #include "test.h"
 #include "context.h"
 
+#ifdef __GNUC__
 #pragma GCC diagnostic ignored "-Wmissing-format-attribute"
+#endif
 
 static const char *
 log_level_to_string(enum xkb_log_level level)

xkbcommon/xkbcommon-keysyms.h

@@ -111,11 +111,11 @@ SOFTWARE.
  * When adding new keysyms to this file, do not forget to also update the
  * following as needed:
  *
- *   - the mappings in src/KeyBind.c in the repo
- *     git://anongit.freedesktop.org/xorg/lib/libX11.git
+ *   - the mappings in src/KeyBind.c in the libX11 repo
+ *     https://gitlab.freedesktop.org/xorg/lib/libx11
  *
- *   - the protocol specification in specs/keysyms.xml
- *     in the repo git://anongit.freedesktop.org/xorg/proto/x11proto.git
+ *   - the protocol specification in specs/keysyms.xml in this repo
+ *     https://gitlab.freedesktop.org/xorg/proto/xorgproto
  *
  */