always define G_GNUC_EXTENSION, even when not needed by GLib. That's

2000-03-21  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* glib.h, configure.in, gutils.h: always define G_GNUC_EXTENSION,
	even when not needed by GLib. That's actually also the way, the
	GLib reference manual describes that macro. Therefore I had to
	remove the lonesome #include <glibconfig.h> in gutils.c, which
	doesn't seem to be needed there however. This change should make
	Ben Gertzfield <che@debian.org> happy.

	* gutils.c: Furthermore two warnings in gutils.c were voided,
	which crept in due to my last change.

glib/glib.h

@@ -1,4 +1,3 @@
-
 /* GLIB - Library of useful routines for C programming
  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
  *
@@ -28,6 +27,19 @@
 #ifndef __G_LIB_H__
 #define __G_LIB_H__
 
+/* Here we provide G_GNUC_EXTENSION as an alias for __extension__,
+ * where this is valid. This allows for warningless compilation of
+ * "long long" types even in the presence of '-ansi -pedantic'. This
+ * of course should be with the other GCC-isms below, but then
+ * glibconfig.h wouldn't load cleanly and it is better to have that
+ * here, than in glibconfig.h.  
+ */
+#if	__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
+#  define G_GNUC_EXTENSION __extension__
+#else
+#  define G_GNUC_EXTENSION
+#endif
+
 /* system specific config file glibconfig.h provides definitions for
  * the extrema of many of the standard types. These are:
  *
@@ -266,7 +278,6 @@ extern "C" {
 #define	G_GNUC_UNUSED
 #endif	/* !__GNUC__ */
 
-
 /* Wrap the gcc __PRETTY_FUNCTION__ and __FUNCTION__ variables with
  * macros, so we can refer to them as strings unconditionally.
  */