diff: boehm_gc/Makefile: fix for race condition

[Fergus Henderson]

boehm_gc/Makefile:
	Fix a race condition caused by the use of the same dummy file
	as a flag in two different rules.  This race condition caused
	the Makefile to occaisionally fail when using parallel make. 
	One rule could unset the flag (i.e. remove the `on_sparc_sunos_5'
	file) in the time between when the other rule set the flag and
	when it checked the flag.  The fix was just to use a different
	file name for the flag in the other rule.

cvs diff  boehm_gc/Makefile
Index: boehm_gc/Makefile
===================================================================
RCS file: /home/mercury1/repository/mercury/boehm_gc/Makefile,v
retrieving revision 1.34
diff -u -r1.34 Makefile
--- Makefile	1997/12/10 06:29:32	1.34
+++ Makefile	1998/02/03 09:35:30
@@ -257,14 +257,14 @@
 
 # shared library version of the collector
 libgc$(PROF).so: $(OBJS) if_mach if_not_there # dyn_load_sunos53.o
-	rm -f on_sparc_sunos5
-	./if_mach SPARC SUNOS5 touch on_sparc_sunos5
+	rm -f on_sparc_sunos5_so
+	./if_mach SPARC SUNOS5 touch on_sparc_sunos5_so
 	./if_mach SPARC SUNOS5 $(MAKE) dyn_load_sunos53.o
 	./if_mach SPARC SUNOS5 \
 	$(LINK_SHARED_OBJ) -o libgc$(PROF).so $(OBJS) dyn_load_sunos53.o \
 		-ldl
-	./if_not_there on_sparc_sunos5 $(MAKE) dyn_load.o
-	./if_not_there on_sparc_sunos5 \
+	./if_not_there on_sparc_sunos5_so $(MAKE) dyn_load.o
+	./if_not_there on_sparc_sunos5_so \
 	$(LINK_SHARED_OBJ) -o libgc$(PROF).so $(OBJS) dyn_load.o -lc
 
 mach_dep.o: $(srcdir)/mach_dep.c $(srcdir)/mips_sgi_mach_dep.s $(srcdir)/mips_ultrix_mach_dep.s $(srcdir)/rs6000_mach_dep.s $(UTILS)
-- 
Fergus Henderson <fjh at cs.mu.oz.au>   |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>   |  of excellence is a lethal habit"
PGP: finger fjh at 128.250.37.3         |     -- the last words of T. S. Garp.