[src/trunk]: src/usr.bin/make make: comment on possible inconsistency in hand...

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

details:   https://anonhg.NetBSD.org/src/rev/80507544be07
branches:  trunk
changeset: 980964:80507544be07
user:      rillig <rillig%NetBSD.org@localhost>
date:      Tue Feb 23 14:27:27 2021 +0000

description:
make: comment on possible inconsistency in handling modifier ':sh'

diffstat:

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

diffs (36 lines):

diff -r d5e9164aa40c -r 80507544be07 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Tue Feb 23 14:21:45 2021 +0000
+++ b/usr.bin/make/var.c        Tue Feb 23 14:27:27 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.847 2021/02/23 14:21:45 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.848 2021/02/23 14:27:27 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -140,7 +140,7 @@
 #include "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.847 2021/02/23 14:21:45 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.848 2021/02/23 14:27:27 rillig Exp $");
 
 typedef enum VarFlags {
        VFL_NONE        = 0,
@@ -3514,8 +3514,16 @@
                        if (errfmt != NULL)
                                Error(errfmt, expr->value.str);
                        Expr_SetValueOwn(expr, output);
-               } else
+               } else {
+                       /*
+                        * TODO: Check whether returning ":sh" would be
+                        *  more consistent with the other modifiers.
+                        *
+                        * TODO: Add a unit test demonstrating that the
+                        *  actual value of this expression has any effect.
+                        */
                        Expr_SetValueRefer(expr, "");
+               }
                *pp = p + 2;
                return AMR_OK;
        } else