From: David Hill <ddhill@php.net>
Date: Mon, 31 Mar 2003 14:01:55 +0000 (+0000)
Subject: Correcting checking of flex version (Dave)
X-Git-Tag: php-4.3.2RC2~229
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e98163546d34f1463d98e70313305e692491e887;p=php

Correcting checking of flex version (Dave)
---

diff --git a/configure.in b/configure.in
index 2a6cb2d7da..8119cd56af 100644
--- a/configure.in
+++ b/configure.in
@@ -155,11 +155,19 @@ if test "$ac_cv_c_const" = "yes" ; then
 fi
 
 AC_MSG_CHECKING([flex version])
-set `echo "" | $LEX -V -v --version 2>/dev/null | grep 'version' | cut -d ' ' -f 3 | sed -e 's/\./ /g' | sed -e 's/[^0-9 ]//g'`
-if test "${1}" != "2" -o "${2}" != "5" -o "${3}" -lt "4"; then
-	 AC_MSG_WARN(You will need flex 2.5.4 or later if you want to regenerate Zend/PHP lexical parsers.)
-fi
+if test "$LEX" ;then
+	flexvers=`echo "" | $LEX -V -v --version 2>/dev/null | 
+		sed -e 's/^.* //' -e 's/\./ /g'`
+	if test ! -z "$flexvers"; then
+		set $flexvers
+		if test "${1}" != "2" -o "${2}" != "5" -o "${3}" -lt "4"; then
+			AC_MSG_WARN(You will need flex 2.5.4 or later if you want to regenerate Zend/PHP lexical parsers.)
+		fi
+	fi
 AC_MSG_RESULT(${1}.${2}.${3} (ok))
+else
+	AC_MSG_WARN(You will need flex 2.5.4 or later if you want to regenerate Zend/PHP lexical parsers.)
+fi
 
 dnl Platform-specific compile settings.
 dnl -------------------------------------------------------------------------