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+1999-10-05  Roland McGrath  <roland@baalperazim.frob.com>
+
+	* mach/mach/mig_support.h [! __USE_GNU]: Use #error to insist that
+	_GNU_SOURCE be defined.
+
 1999-10-08  Ulrich Drepper  <drepper@cygnus.com>
 
 	* ctype/ctype.h: Pretty print.