[src/trunk]: src/usr.bin/make/unit-tests tests/make: be more specific about t...

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

details:   https://anonhg.NetBSD.org/src/rev/b3b4b899bdaa
branches:  trunk
changeset: 369966:b3b4b899bdaa
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Sep 10 16:20:04 2022 +0000

description:
tests/make: be more specific about the egrep compatibility

diffstat:

 usr.bin/make/unit-tests/Makefile |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (25 lines):

diff -r 62e276487e64 -r b3b4b899bdaa usr.bin/make/unit-tests/Makefile
--- a/usr.bin/make/unit-tests/Makefile  Sat Sep 10 16:03:43 2022 +0000
+++ b/usr.bin/make/unit-tests/Makefile  Sat Sep 10 16:20:04 2022 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.325 2022/09/09 18:36:15 sjg Exp $
+# $NetBSD: Makefile,v 1.326 2022/09/10 16:20:04 rillig Exp $
 #
 # Unit tests for make(1)
 #
@@ -673,11 +673,13 @@
 _!= mkdir -p ${TMPDIR}
 .endif
 
-# Some systems have deprecated egrep for grep -E
-# but not everyone supports that
+# Some Linux systems such as Fedora have deprecated egrep in favor of grep -E.
 .if ${.MAKE.OS:NLinux} == ""
 EGREP= grep -E
 .endif
+# Keep the classical definition for all other systems.  Just as the bmake code
+# is kept compatible with C90, the tests are kept compatible with systems that
+# are several decades old and don't follow modern POSIX standards.
 EGREP?= egrep
 
 MAKE_TEST_ENV=  EGREP="${EGREP}"