From d2954ce4d0803df31fb2ca2840ac21db5ab70a4d Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Wed, 10 Apr 2002 17:56:00 +0000
Subject: [PATCH] explicitly require bison and flex

---
 configure.ac | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/configure.ac b/configure.ac
index a138b389e..dc8e7781d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -91,8 +91,18 @@ AC_PROG_LN_S
 AC_PROG_RANLIB
 AC_LIBTOOL_WIN32_DLL
 AM_PROG_LIBTOOL
+
 AC_PROG_YACC
+if echo $YACC | grep -vq bison; then
+	AC_MSG_ERROR(GNU bison is required but wasn't found)
+fi
+
 AM_PROG_LEX
+if echo $LEX | grep -vq flex; then
+	AC_MSG_ERROR(GNU flex is required but wasn't found)
+fi
+
+
 
 AC_ARG_WITH(cpp,
 [  --with-cpp=CPP          how qfcc should invoke cpp],