[src/trunk]: src/usr.bin/make Fix awful bug where:

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9f0f381bb9f5
branches:  trunk
changeset: 473417:9f0f381bb9f5
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Jun 02 18:47:11 1999 +0000

description:
Fix awful bug where:

        V := $V foo
        V := $V bar

would report that variable V is recursive...

diffstat:

 usr.bin/make/parse.c |  14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)

diffs (41 lines):

diff -r 3b9c89147666 -r 9f0f381bb9f5 usr.bin/make/parse.c
--- a/usr.bin/make/parse.c      Wed Jun 02 15:57:18 1999 +0000
+++ b/usr.bin/make/parse.c      Wed Jun 02 18:47:11 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: parse.c,v 1.41 1998/11/17 23:56:23 ross Exp $  */
+/*     $NetBSD: parse.c,v 1.42 1999/06/02 18:47:11 christos Exp $      */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -39,14 +39,14 @@
  */
 
 #ifdef MAKE_BOOTSTRAP
-static char rcsid[] = "$NetBSD: parse.c,v 1.41 1998/11/17 23:56:23 ross Exp $";
+static char rcsid[] = "$NetBSD: parse.c,v 1.42 1999/06/02 18:47:11 christos Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)parse.c    8.3 (Berkeley) 3/19/94";
 #else
-__RCSID("$NetBSD: parse.c,v 1.41 1998/11/17 23:56:23 ross Exp $");
+__RCSID("$NetBSD: parse.c,v 1.42 1999/06/02 18:47:11 christos Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -1520,6 +1520,14 @@
        Boolean   oldOldVars = oldVars;
 
        oldVars = FALSE;
+
+       /*
+        * make sure that we set the variable the first time to nothing
+        * so that it gets substituted!
+        */
+       if (!Var_Exists(line, ctxt))
+           Var_Set(line, "", ctxt);
+
        cp = Var_Subst(NULL, cp, ctxt, FALSE);
        oldVars = oldOldVars;