From 564d45b5a55adeb48f69fdecb2bf4ed1f909850b Mon Sep 17 00:00:00 2001
From: Dan Cross <cross@gajendra.net>
Date: Tue, 22 Jul 2025 14:42:03 +0000
Subject: config: add $egrep

Introduce a new variable set in $PLAN9/config:
$egrep, which is conditionally set to either
`egrep` or `grep -E`, based on platform, and use
this when we want to invoke `egrep`.

This works around the endless warnings from GNU
grep stating that `egrep` is deprecated in favor
of `grep -E`, when run on e.g. Linux.
---
 bin/9c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'bin/9c')

diff --git a/bin/9c b/bin/9c
index ccfbe7e9..195fec81 100755
--- a/bin/9c
+++ b/bin/9c
@@ -8,6 +8,7 @@ usegcc()
 		-O2 \
 		-c \
 		-Wall \
+		-Wno-array-parameter \
 		-Wno-parentheses \
 		-Wno-missing-braces \
 		-Wno-switch \
@@ -23,7 +24,7 @@ usegcc()
 		-fno-omit-frame-pointer \
 		-fsigned-char \
 		-fcommon \
-		-std=c11 \
+		-std=gnu11 \
 	"
 	# want to put -fno-optimize-sibling-calls here but
 	# that option only works with gcc3+ it seems
@@ -56,7 +57,7 @@ quiet()
 	ignore=$ignore'|expanded from macro'
 
 	grep -v '__p9l_autolib_' "$1" |
-	egrep -v "$ignore" |
+	$egrep -v "$ignore" |
 	sed 's/ .first use in this function.$//; s/\"\([^\"][^\"]*\)\", line \([0-9][0-9]*\)/\1:\2/g' |
 	$(which uniq) 1>&2  # avoid built-in uniq on SunOS
 }
-- 
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