Fix up the -Wno-error problem for non-gcc compilers

Pointed out by many many ppl

src/backend/optimizer/geqo/Makefile

@@ -5,7 +5,7 @@
 #
 # Copyright (c) 1994, Regents of the University of California
 #
-# $Id: Makefile,v 1.5 1997/04/04 10:39:50 scrappy Exp $
+# $Id: Makefile,v 1.6 1997/04/15 17:24:17 scrappy Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -16,7 +16,12 @@ INCLUDE_OPT = -I../.. \
               -I../../port/$(PORTNAME) \
               -I../../../include
 
-CFLAGS+=$(INCLUDE_OPT)  -Wno-error
+CFLAGS+=$(INCLUDE_OPT)
+
+ifeq ($CC), gcc)
+CFLAGS+= -Wno-error
+endif
+
 
 OBJS =	geqo_copy.o geqo_eval.o geqo_main.o geqo_misc.o \
 	geqo_params.o geqo_paths.o geqo_pool.o geqo_recombination.o \