[src/trunk]: src/usr.bin/make make(1): in SuffExpandChildren, only expand ${V...

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

details:   https://anonhg.NetBSD.org/src/rev/3d3c0a0d5c0d
branches:  trunk
changeset: 978421:3d3c0a0d5c0d
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Nov 21 17:18:36 2020 +0000

description:
make(1): in SuffExpandChildren, only expand ${VAr} if needed

diffstat:

 usr.bin/make/suff.c |  14 ++++----------
 1 files changed, 4 insertions(+), 10 deletions(-)

diffs (39 lines):

diff -r 9ad5ac51b423 -r 3d3c0a0d5c0d usr.bin/make/suff.c
--- a/usr.bin/make/suff.c       Sat Nov 21 17:09:34 2020 +0000
+++ b/usr.bin/make/suff.c       Sat Nov 21 17:18:36 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: suff.c,v 1.261 2020/11/21 13:20:12 rillig Exp $        */
+/*     $NetBSD: suff.c,v 1.262 2020/11/21 17:18:36 rillig Exp $        */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -114,7 +114,7 @@
 #include "dir.h"
 
 /*     "@(#)suff.c     8.4 (Berkeley) 3/21/94" */
-MAKE_RCSID("$NetBSD: suff.c,v 1.261 2020/11/21 13:20:12 rillig Exp $");
+MAKE_RCSID("$NetBSD: suff.c,v 1.262 2020/11/21 17:18:36 rillig Exp $");
 
 #define SUFF_DEBUG0(text) DEBUG0(SUFF, text)
 #define SUFF_DEBUG1(fmt, arg1) DEBUG1(SUFF, fmt, arg1)
@@ -1178,18 +1178,12 @@
                    pp_skip_hspace(&cp);
                    start = cp;         /* Continue at the next non-space. */
                } else if (*cp == '$') {
-                   /*
-                    * Start of a variable spec -- contact variable module
-                    * to find the end so we can skip over it.
-                    */
+                   /* Skip over the variable expression. */
                    const char *nested_p = cp;
                    const char  *junk;
                    void        *freeIt;
 
-                   /* XXX: Why VARE_WANTRES when the result is not used? */
-                   (void)Var_Parse(&nested_p, pgn,
-                                   VARE_WANTRES | VARE_UNDEFERR,
-                                   &junk, &freeIt);
+                   (void)Var_Parse(&nested_p, pgn, VARE_NONE, &junk, &freeIt);
                    /* TODO: handle errors */
                    if (junk == var_Error) {
                        Parse_Error(PARSE_FATAL,