diff: fix const cast warnings

[Fergus Henderson]

Peter Ross already fixed this in scripts/mgnuc.in, but he
was probably unaware that compiler/mercury_compile.m
invokes gcc directly rather than via scripts/mgnuc.in,
so it needs to be modified too.

--------------------

Estimated hours taken: 0.25

compiler/mercury_compile.m:
	Don't pass `-Wcast-qual' to gcc, since it results in too many
	spurious warnings.

Index: compiler/mercury_compile.m
===================================================================
RCS file: /home/mercury1/repository/mercury/compiler/mercury_compile.m,v
retrieving revision 1.109
diff -u -r1.109 mercury_compile.m
--- mercury_compile.m	1998/10/28 06:14:58	1.109
+++ mercury_compile.m	1998/10/28 07:31:28
@@ -2276,9 +2276,9 @@
 		% if --inline-alloc is enabled, don't enable missing-prototype
 		% warnings, since gc_inline.h is missing lots of prototypes
 		( InlineAlloc = yes ->
-			WarningOpt = "-Wall -Wwrite-strings -Wpointer-arith -Wcast-qual -Wtraditional -Wshadow -Wmissing-prototypes -Wno-unused -Wno-uninitialized "
+			WarningOpt = "-Wall -Wwrite-strings -Wpointer-arith -Wtraditional -Wshadow -Wmissing-prototypes -Wno-unused -Wno-uninitialized "
 		;
-			WarningOpt = "-Wall -Wwrite-strings -Wpointer-arith -Wcast-qual -Wtraditional -Wshadow -Wmissing-prototypes -Wno-unused -Wno-uninitialized -Wstrict-prototypes "
+			WarningOpt = "-Wall -Wwrite-strings -Wpointer-arith -Wtraditional -Wshadow -Wmissing-prototypes -Wno-unused -Wno-uninitialized -Wstrict-prototypes "
 		)
 	; CompilerType = lcc ->
 		WarningOpt = "-w "

-- 
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.