From eec7cdf03dda2bd26e320ead73b91da5a9d86443 Mon Sep 17 00:00:00 2001
From: Ludovic Rousseau <ludovic.rousseau@free.fr>
Date: Thu, 2 Mar 2023 21:14:11 +0100
Subject: [PATCH] configure.ac: fail if flex is not found

We use the same mechanism in PCSC 3f89340785934785cf1490d3e788eefb25c50a69
---
 configure.ac | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 0043459a..2559c917 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,7 +32,11 @@ AC_PROG_CPP
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 AC_PROG_LN_S
-AM_PROG_LEX
+AC_PROG_LEX([noyywrap])
+if test $LEX = ":"
+then
+    AC_MSG_ERROR([no lex or flex found])
+fi
 AM_PROG_AR
 PKG_PROG_PKG_CONFIG