[GEM-dev] build on ubuntu 8.10

[patco]

hello, I have a problem for building gem on ubuntu 8.10, the build
system complains for existing missing files.
 

configure: error: GL (headers) not found! you need openGL!!!

$ apt-cache show xlibmesa-gl-dev 
Package: xlibmesa-gl-dev
Priority: optional
Section: libdevel
Installed-Size: 24
Maintainer: Ubuntu Core Developers
<ubuntu-devel-discuss at lists.ubuntu.com>
Original-Maintainer: Debian X Strike Force <debian-x at lists.debian.org>
Architecture: all
Source: xorg
Version: 1:7.4~5ubuntu3
Depends: libgl1-mesa-dev, x11-common
Filename: pool/main/x/xorg/xlibmesa-gl-dev_7.4~5ubuntu3_all.deb
Size: 960

$ ls /usr/include/GL |grep gl.h
gl.h