Anyone find it frustrating when make -V FOO shows you just ${FU}?
Sometimes you want, that, but often you just want to know what it
expands to.  Changing the behavior of -V would of course break the
world, so how about -v for the expanded version? (ok I'm lousy at
naming things ;-)

Given:

FOO=fu
BAR=bar

FUBAR=${FOO} ${BAR}


$ make -V FUBAR
${FOO} ${BAR}
$ make -v FUBAR
fu bar
$

--sjg

Index: main.c
===================================================================
RCS file: /cvsroot/src/usr.bin/make/main.c,v
retrieving revision 1.91
diff -u -p -r1.91 main.c
--- main.c	2003/08/07 11:14:53	1.91
+++ main.c	2003/09/02 23:42:47
@@ -154,6 +154,7 @@ Boolean			allPrecious;	/* .PRECIOUS give
 static Boolean		noBuiltins;	/* -r flag */
 static Lst		makefiles;	/* ordered list of makefiles to read */
 static Boolean		printVars;	/* print value of one or more vars */
+static Boolean		printVarSubst;	/* print expanded value of one or more vars */
 static Lst		variables;	/* list of variables to print */
 int			maxJobs;	/* -j argument */
 static int		maxLocal;	/* -L argument */
@@ -209,9 +210,9 @@ MainParseArgs(int argc, char **argv)
 
 	optind = 1;	/* since we're called more than once */
 #ifdef REMOTE
-# define OPTFLAGS "BD:I:J:L:NPST:V:WXd:ef:ij:km:nqrst"
+# define OPTFLAGS "BD:I:J:L:NPST:V:v:WXd:ef:ij:km:nqrst"
 #else
-# define OPTFLAGS "BD:I:J:NPST:V:WXd:ef:ij:km:nqrst"
+# define OPTFLAGS "BD:I:J:NPST:V:v:WXd:ef:ij:km:nqrst"
 #endif
 rearg:	while((c = getopt(argc, argv, OPTFLAGS)) != -1) {
 		switch(c) {
@@ -249,6 +250,13 @@ rearg:	while((c = getopt(argc, argv, OPT
 			    jobServer = TRUE;
 			}
 			break;
+		case 'v':
+			printVarSubst = TRUE;
+			printVars = TRUE;
+			(void)Lst_AtEnd(variables, (ClientData)optarg);
+			Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL);
+			Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
+			break;
 		case 'V':
 			printVars = TRUE;
 			(void)Lst_AtEnd(variables, (ClientData)optarg);
@@ -913,9 +921,15 @@ main(int argc, char **argv)
 		for (ln = Lst_First(variables); ln != NILLNODE;
 		    ln = Lst_Succ(ln)) {
 			char *value = Var_Value((char *)Lst_Datum(ln),
-					  VAR_GLOBAL, &p1);
+						VAR_GLOBAL, &p1);
+
+			if (printVarSubst && value && strchr(value, '$')) {
+				char *s = Var_Subst(NULL, value, VAR_GLOBAL, 0);
 
-			printf("%s\n", value ? value : "");
+				printf("%s\n", s);
+				free(s);
+			} else
+				printf("%s\n", value ? value : "");
 			if (p1)
 				free(p1);
 		}