WebArenaSuitesProでPHP5をインストール

./configureでこんなエラーに

configure: error: cannot find output from lex; giving up

flexのインストールが必要みたい

[root@localhost php-5.2.0]# yum install flex
Setting up Install Process
Setting up Repos
base 100% |=========================| 951 B 00:00
local 100% |=========================| 951 B 00:00
updates-released 100% |=========================| 951 B 00:00
Reading repository metadata in from local files
base : ################################################## 1652/1652
local : ################################################## 4/4
updates-re: ################################################## 795/795
Excluding Packages in global exclude list
Finished
Excluding Packages from Fedora Core 3 - i386 - Base
Finished
Excluding Packages from Fedora Core 3 - i386 - Released Updates
Finished