[src/trunk]: src/usr.bin/make Ensure VAR+=val on command line is handled corr...

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

details:   https://anonhg.NetBSD.org/src/rev/4308594b215b
branches:  trunk
changeset: 828313:4308594b215b
user:      sjg <sjg%NetBSD.org@localhost>
date:      Fri Dec 08 03:36:42 2017 +0000

description:
Ensure VAR+=val on command line is handled correctly

If VAR is not previously set, call Var_Set to deal with
the special case of VAR_CMD.

If VAR is previously set, and ctxt is VAR_CMD we should do the update
even if VAR_FROM_CMD is set.

diffstat:

 usr.bin/make/unit-tests/varcmd.exp |   1 +
 usr.bin/make/unit-tests/varcmd.mk  |   7 +++++--
 usr.bin/make/var.c                 |  10 +++++-----
 3 files changed, 11 insertions(+), 7 deletions(-)

diffs (80 lines):

diff -r 2fd4f73e2085 -r 4308594b215b usr.bin/make/unit-tests/varcmd.exp
--- a/usr.bin/make/unit-tests/varcmd.exp        Fri Dec 08 03:08:19 2017 +0000
+++ b/usr.bin/make/unit-tests/varcmd.exp        Fri Dec 08 03:36:42 2017 +0000
@@ -1,6 +1,7 @@
 default FU=<v>fu</v> FOO=<v>foo</v> VAR=<v></v>
 two FU=<v>bar</v> FOO=<v>goo</v> VAR=<v></v>
 immutable FU='bar'
+immutable FOO='goo'
 three FU=<v>bar</v> FOO=<v>goo</v> VAR=<v></v>
 four FU=<v>bar</v> FOO=<v>goo</v> VAR=<v>Internal</v>
 five FU=<v>bar</v> FOO=<v>goo</v> VAR=<v>Internal</v>
diff -r 2fd4f73e2085 -r 4308594b215b usr.bin/make/unit-tests/varcmd.mk
--- a/usr.bin/make/unit-tests/varcmd.mk Fri Dec 08 03:08:19 2017 +0000
+++ b/usr.bin/make/unit-tests/varcmd.mk Fri Dec 08 03:36:42 2017 +0000
@@ -1,4 +1,4 @@
-# $Id: varcmd.mk,v 1.2 2017/11/18 22:34:04 sjg Exp $
+# $Id: varcmd.mk,v 1.3 2017/12/08 03:36:42 sjg Exp $
 #
 # Test behaviour of recursive make and vars set on command line.
 
@@ -15,7 +15,7 @@
        @echo "${TAG} FU=<v>${FU}</v> FOO=<v>${FOO}</v> VAR=<v>${VAR}</v>"
 
 one:   show
-       @${.MAKE} -f ${MAKEFILE} FU=bar FOO=goo two
+       @${.MAKE} -f ${MAKEFILE} FU=bar FOO+=goo two
 
 two:   show
        @${.MAKE} -f ${MAKEFILE} three
@@ -27,10 +27,13 @@
 .ifmake two
 # this should not work
 FU+= oops
+FOO+= oops
 _FU:= ${FU}
+_FOO:= ${FOO}
 two: immutable
 immutable:
        @echo "$@ FU='${_FU}'"
+       @echo "$@ FOO='${_FOO}'"
 .endif
 .ifmake four
 VAR=Internal
diff -r 2fd4f73e2085 -r 4308594b215b usr.bin/make/var.c
--- a/usr.bin/make/var.c        Fri Dec 08 03:08:19 2017 +0000
+++ b/usr.bin/make/var.c        Fri Dec 08 03:36:42 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.216 2017/11/18 22:34:04 sjg Exp $    */
+/*     $NetBSD: var.c,v 1.217 2017/12/08 03:36:42 sjg Exp $    */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: var.c,v 1.216 2017/11/18 22:34:04 sjg Exp $";
+static char rcsid[] = "$NetBSD: var.c,v 1.217 2017/12/08 03:36:42 sjg Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)var.c      8.3 (Berkeley) 3/19/94";
 #else
-__RCSID("$NetBSD: var.c,v 1.216 2017/11/18 22:34:04 sjg Exp $");
+__RCSID("$NetBSD: var.c,v 1.217 2017/12/08 03:36:42 sjg Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -1064,8 +1064,8 @@
     v = VarFind(name, ctxt, (ctxt == VAR_GLOBAL) ? (FIND_CMD|FIND_ENV) : 0);
 
     if (v == NULL) {
-       VarAdd(name, val, ctxt);
-    } else if (!(v->flags & VAR_FROM_CMD)) {
+       Var_Set(name, val, ctxt, 0);
+    } else if (ctxt == VAR_CMD || !(v->flags & VAR_FROM_CMD)) {
        Buf_AddByte(&v->val, ' ');
        Buf_AddBytes(&v->val, strlen(val), val);