diff: bug fix for compilation with tracing

[Zoltan Somogyi]

Apologies for inadvertently including the diff for this change
in with the diff of my last mail. The two changes will be committed
indepedently.

Estimated hours taken: 0.5

compiler/mercury_compile.m:
	Fix an oversight: when compiling some source files directly to
	an executable, include the trace and browser libraries in the
	list of libraries to be linked in if the compiler options specify 
	execution tracing.

Zoltan.

Index: compiler/mercury_compile.m
===================================================================
RCS file: /home/mercury1/repository/mercury/compiler/mercury_compile.m,v
retrieving revision 1.121
diff -u -b -u -r1.121 mercury_compile.m
--- mercury_compile.m	1999/03/28 07:30:40	1.121
+++ mercury_compile.m	1999/04/05 12:03:53
@@ -2485,7 +2485,14 @@
 		    { join_string_list(LinkLibraryDirectoriesList, "-L", "",
 				" ", LinkLibraryDirectories) },
 		    globals__io_lookup_accumulating_option(link_libraries,
-				LinkLibrariesList),
+				LinkLibrariesOptions),
+		    { TraceLevel \= none ->
+		    	LinkLibrariesList = LinkLibrariesOptions
+		    ;
+		    	list__append(LinkLibrariesOptions,
+				["mer_trace", "mer_browser"],
+				LinkLibrariesList)
+		    },
 		    { join_string_list(LinkLibrariesList, "-l", "", " ",
 				LinkLibraries) },
 		    globals__io_lookup_accumulating_option(link_objects,