[src/trunk]: src/usr.bin/make make(1): add error handling for .for loop items

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

details:   https://anonhg.NetBSD.org/src/rev/5179919936b1
branches:  trunk
changeset: 1017410:5179919936b1
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Dec 27 10:04:32 2020 +0000

description:
make(1): add error handling for .for loop items

Right now, Var_Subst always returns VPR_OK, even if there had been parse
errors or evaluation errors.  If that is no longer true, the errors will
be reported properly.

diffstat:

 usr.bin/make/for.c |  13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diffs (41 lines):

diff -r dca878322167 -r 5179919936b1 usr.bin/make/for.c
--- a/usr.bin/make/for.c        Sun Dec 27 09:58:35 2020 +0000
+++ b/usr.bin/make/for.c        Sun Dec 27 10:04:32 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: for.c,v 1.120 2020/12/19 13:31:37 rillig Exp $ */
+/*     $NetBSD: for.c,v 1.121 2020/12/27 10:04:32 rillig Exp $ */
 
 /*
  * Copyright (c) 1992, The Regents of the University of California.
@@ -60,7 +60,7 @@
 #include "make.h"
 
 /*     "@(#)for.c      8.1 (Berkeley) 6/6/93"  */
-MAKE_RCSID("$NetBSD: for.c,v 1.120 2020/12/19 13:31:37 rillig Exp $");
+MAKE_RCSID("$NetBSD: for.c,v 1.121 2020/12/27 10:04:32 rillig Exp $");
 
 static int forLevel = 0;       /* Nesting level */
 
@@ -206,8 +206,12 @@
 
        {
                char *items;
-               (void)Var_Subst(p, VAR_GLOBAL, VARE_WANTRES, &items);
-               /* TODO: handle errors */
+               if (Var_Subst(p, VAR_GLOBAL, VARE_WANTRES, &items) != VPR_OK) {
+                       Parse_Error(PARSE_FATAL, "Error in .for loop items");
+                       f->items.len = 0;
+                       goto done;
+               }
+
                f->items = Str_Words(items, FALSE);
                free(items);
 
@@ -233,6 +237,7 @@
                }
        }
 
+done:
        accumFor = f;
        forLevel = 1;
        return 1;