From 668e8a20e3561063ee7478e91c9f81bb40cfed7a Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 2 Dec 2023 21:50:45 -0800
Subject: [PATCH] Simplify recent $PERL check
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* configure.ac: Don’t spin off subprocesses to check $PERL.
---
 configure.ac | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 946fecb67..5cda80a18 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,13 +68,16 @@ AUTOMAKE="\"`pwd`/pre-inst-env\" automake-$APIVERSION"
 AC_PROG_LN_S
 
 AC_PATH_PROG([PERL], [perl])
-if test -z "$PERL"; then
+case $PERL in
+ '')
    AC_MSG_ERROR([perl not found])
-elif echo "$PERL" | grep '[ 	]' >/dev/null; then
+   ;;
+ *' '* | *'	'*)
   AC_MSG_ERROR([The path to your Perl contains spaces or tabs.
 This would cause build failures later or unusable programs.
 Please use a path without spaces and try again.])
-fi
+  ;;
+esac
 
 # Save details about the selected perl interpreter in config.log.
 AM_RUN_LOG([$PERL --version])
-- 
2.40.1