trivial diff: Mmakefile: ignore errors installing lp_solve

[Fergus Henderson]

Mmakefile:
	If building or installing `lp_solve' fails, ignore the error.
	This avoids portability problems with lp_solve's reliance
	on yacc and lex causing too much hassle...

Index: Mmakefile
===================================================================
RCS file: /home/staff/zs/imp/mercury/Mmakefile,v
retrieving revision 1.11
diff -u -u -r1.11 Mmakefile
--- Mmakefile	1997/10/11 15:26:54	1.11
+++ Mmakefile	1997/10/15 15:52:22
@@ -113,7 +113,7 @@
 
 .PHONY: lp_solve
 lp_solve:
-	cd lp_solve && $(SUBDIR_MMAKE)
+	-cd lp_solve && $(SUBDIR_MMAKE)
 
 #-----------------------------------------------------------------------------#
 
@@ -302,7 +302,7 @@
 
 .PHONY: install_lp_solve
 install_lp_solve: lp_solve
-	cd lp_solve && $(SUBDIR_MMAKE) install
+	-cd lp_solve && $(SUBDIR_MMAKE) install
 
 #-----------------------------------------------------------------------------#
 

-- 
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.