Compiling Doom Starter Kit (by Blendo, and IDSoftware, of course) issues on 64 bits. http://blendogames.com/news/?p=844

gistfile1.sh

# you can have permission issues when it starts compiling libcurl, just chmod it

# libcurl test fails on a sizeof test
sudo apt-get install libssl-dev:i386

# it doesn't find -lXext and -lXxf86vm
sudo ln -s /usr/lib/i386-linux-gnu/libXxf86vm.so.1 /usr/lib/i386-linux-gnu/libXxf86vm.so
sudo ln -s /usr/lib/i386-linux-gnu/libXext.so.6 /usr/lib/i386-linux-gnu/libXext.so

# then you need doomstarterkit/base in the same folder as doomx86 executable, and
# doomx86-d3xp.so copied to doomx86.so inside base folder