Hi,

I've installed an apache2.0 server on my linux system (it works fine) and tried to install php 4.3.4 enabling apache and mysql, when running configure however I got the following error:
  ./configure: line 2425: lex: command not found
  configure: error: cannot find output from lex; giving up
since I'm sort of new to linux I don't know what to do about it...
I was using these installation instructions: http://www.php.net/manual/en/install.apache2.php

Does anyone have any idea what it means and/or how to fix it?
Any help will be greatly appreciated.

Kerux

It looks like whoever built your version of PHP assumed people would have flex installed. Flex is a free reimplementation of a program callled "Lex" : a tool for generating programs that perform pattern-matching on text. If you install Flex, the compilation of PHP should proceed peacefully.

Zend recommend installing Flex and Bison before installing PHP:
http://www.zend.com/manual/install.unix.php

You don't say which version (if any) of GNU/Linux distribution you are using, but here are debian's notes on flex:
http://packages.debian.org/unstable/devel/flex

I hope that helps
Dan

Thanks!
I missed the flex and bison requirements for php, but after installing them php configuration and installation indeed proceeded as expected.

Kerux