From ed50c346126f5385163d03bc9639d28ead6c8536 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Thu, 22 May 2008 15:01:08 +0200
Subject: add flex version warning (better with >= 2.5.33)

---
 configure.in | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index f3b8785..0a6b8fe 100644
--- a/configure.in
+++ b/configure.in
@@ -49,6 +49,21 @@ then
 	exit 1
 fi
 
+AC_MSG_CHECKING(flex version)
+flex_version=`$LEX --version | sed 's/version//g' | awk '/flex/ {print $2}'`
+flex_major=`echo $flex_version| cut -d . -f 1`
+flex_minor=`echo $flex_version| cut -d . -f 2`
+flex_rev=`echo $flex_version| cut -d . -f 3`
+ 
+if test "$flex_major" -eq "2" && test "$flex_minor" -eq "5" && test "$flex_rev" -ge "33"; then
+	AC_MSG_RESULT([$flex_version. OK])
+else
+	AC_MSG_WARN([flex version $flex_version found.
+	Version 2.5.33 or greater is required. You may experience problems
+	while compilating the conntrack-tools. Please, consider to upgrade 
+	flex.])
+fi
+
 AC_CHECK_HEADERS([linux/capability.h],, [AC_MSG_ERROR([Cannot find linux/capabibility.h])])
 
 # Checks for libraries.
-- 
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