[src/trunk]: src/usr.bin/make Comment on interaction of posix.mk with[out] -r

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

details:   https://anonhg.NetBSD.org/src/rev/a3ce8d32d654
branches:  trunk
changeset: 365698:a3ce8d32d654
user:      sjg <sjg%NetBSD.org@localhost>
date:      Mon Apr 18 16:09:05 2022 +0000

description:
Comment on interaction of posix.mk with[out] -r

diffstat:

 usr.bin/make/parse.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r dc286b665fda -r a3ce8d32d654 usr.bin/make/parse.c
--- a/usr.bin/make/parse.c      Mon Apr 18 15:59:39 2022 +0000
+++ b/usr.bin/make/parse.c      Mon Apr 18 16:09:05 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: parse.c,v 1.669 2022/04/18 15:06:27 rillig Exp $       */
+/*     $NetBSD: parse.c,v 1.670 2022/04/18 16:09:05 sjg Exp $  */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -106,7 +106,7 @@
 #include "pathnames.h"
 
 /*     "@(#)parse.c    8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: parse.c,v 1.669 2022/04/18 15:06:27 rillig Exp $");
+MAKE_RCSID("$NetBSD: parse.c,v 1.670 2022/04/18 16:09:05 sjg Exp $");
 
 /*
  * A file being read.
@@ -1254,6 +1254,11 @@
 #ifdef POSIX
        case SP_POSIX:
                if (posix_state == PS_NOW_OR_NEVER) {
+                       /*
+                        * With '-r', 'posix.mk' (if it exists)
+                        * can effectively substitute for 'sys.mk',
+                        * otherwise it is an extension.
+                        */
                        Global_Set("%POSIX", "1003.2");
                        IncludeFile("posix.mk", true, false, true);
                }