[m-dev.] diff: tools/bootcheck: fix --copy-boehm-gc --keep-stage-2 bug

[Fergus Henderson]

Estimated hours taken: 0.25

tools/bootcheck:
	When building with --copy-boehm-gc, use a symbolic link for
	boehm_gc/Makefile, like we do for boehm_gc/*.[ch], rather than
	making a copy.  This avoids a problem where it would recompile
	the stage 2 boehm_gc directory every time you rerun a
	bootcheck, even with --keep-stage-2; this was because it would
	recopy the file, updating the timestamp, which would force
	everything to be recompiled.

Workspace: /home/pgrad/fjh/ws/hg3
Index: tools/bootcheck
===================================================================
RCS file: /home/mercury1/repository/mercury/tools/bootcheck,v
retrieving revision 1.106
diff -u -d -r1.106 bootcheck
--- tools/bootcheck	2000/12/04 18:28:54	1.106
+++ tools/bootcheck	2000/12/13 11:08:30
@@ -415,7 +415,7 @@
 		$LN_S $root/boehm_gc/*.s .
 		$LN_S $root/boehm_gc/include .
 		cp $root/boehm_gc/Mmake* .
-		cp $root/boehm_gc/Makefile .
+		$LN_S $root/boehm_gc/Makefile .
 		cp $root/boehm_gc/NT_MAKEFILE .
 		cp $root/boehm_gc/gc_cpp.cc .
 		$LN_S $root/boehm_gc/machdeps .

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
                                    |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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