From c7be0c680d96ba6209c86e509ab2682e5041a53d Mon Sep 17 00:00:00 2001
From: mmzk1526 <yc4120@ic.ac.uk>
Date: Wed, 3 Jan 2024 11:08:35 +0000
Subject: [PATCH] Use "-V" for alex version check for better backward
compatibility Fixes #24302. In recent versions of alex, "-v" is used for
"--verbose" instead of "-version".
---
m4/fptools_alex.m4 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/m4/fptools_alex.m4 b/m4/fptools_alex.m4
index 527ee1e187b7..e5366e40f6b0 100644
--- a/m4/fptools_alex.m4
+++ b/m4/fptools_alex.m4
@@ -14,7 +14,7 @@ AC_SUBST(AlexCmd,$ALEX)
AC_CACHE_CHECK([for version of alex], fptools_cv_alex_version,
changequote(, )dnl
[if test x"$AlexCmd" != x; then
- fptools_cv_alex_version=`"$AlexCmd" -v |
+ fptools_cv_alex_version=`"$AlexCmd" -V |
grep 'Alex [Vv]ersion' | sed -e 's/Alex [Vv]ersion \([0-9\.]*\).*/\1/g'` ;
else
fptools_cv_alex_version="";
--
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