Module Name:    src
Committed By:   sjg
Date:           Fri Dec  8 03:36:42 UTC 2017

Modified Files:
        src/usr.bin/make: var.c
        src/usr.bin/make/unit-tests: varcmd.exp varcmd.mk

Log Message:
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.


To generate a diff of this commit:
cvs rdiff -u -r1.216 -r1.217 src/usr.bin/make/var.c
cvs rdiff -u -r1.2 -r1.3 src/usr.bin/make/unit-tests/varcmd.exp \
    src/usr.bin/make/unit-tests/varcmd.mk

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/usr.bin/make/var.c
diff -u src/usr.bin/make/var.c:1.216 src/usr.bin/make/var.c:1.217
--- src/usr.bin/make/var.c:1.216	Sat Nov 18 22:34:04 2017
+++ src/usr.bin/make/var.c	Fri Dec  8 03:36:42 2017
@@ -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 @@ Var_Append(const char *name, const char 
     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);
 

Index: src/usr.bin/make/unit-tests/varcmd.exp
diff -u src/usr.bin/make/unit-tests/varcmd.exp:1.2 src/usr.bin/make/unit-tests/varcmd.exp:1.3
--- src/usr.bin/make/unit-tests/varcmd.exp:1.2	Sat Nov 18 22:34:04 2017
+++ src/usr.bin/make/unit-tests/varcmd.exp	Fri Dec  8 03:36:42 2017
@@ -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>
Index: src/usr.bin/make/unit-tests/varcmd.mk
diff -u src/usr.bin/make/unit-tests/varcmd.mk:1.2 src/usr.bin/make/unit-tests/varcmd.mk:1.3
--- src/usr.bin/make/unit-tests/varcmd.mk:1.2	Sat Nov 18 22:34:04 2017
+++ src/usr.bin/make/unit-tests/varcmd.mk	Fri Dec  8 03:36:42 2017
@@ -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 @@ show:
 	@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 @@ three:	show
 .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

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