From e48d8821ab1d9ff8337f1f64d7f816cc9c974288 Mon Sep 17 00:00:00 2001
From: Dan Fandrich <dan@coneharvesters.com>
Date: Thu, 8 Aug 2024 17:08:34 -0700
Subject: [PATCH] Replace nonportable grep -o with awk

This stops an error shown at the end of configure on systems with POSIX
grep and fixes the warning it's trying to convey.

Closes #14469
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index b059be35df..b8b71501af 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5212,7 +5212,8 @@ AC_MSG_NOTICE([Configured to build curl/libcurl:
   Features:         ${SUPPORT_FEATURES}
 ])
 
-non13=`echo "$TLSCHOICE" | $EGREP -io 'bearssl|secure-transport'`;
+# grep -o would simplify this, but is nonportable
+[non13=`echo "$TLSCHOICE" | $AWK '{split("bearssl secure-transport", a); for (i in a) if(match(tolower($0), a[i])) print a[i];}'`]
 if test -n "$non13"; then
  for a in $non13; do
    AC_MSG_WARN([$a is enabled for TLS but it does not support TLS 1.3])