To be honest, GAE is preeeetty dead (the git purist in me wants to point to the fact it still uses SVN as an indicator of how long it's been dead
![Tongue :P](https://forum.megaglest.org/Smileys/SoLoSMiLeYS1/tongue.gif)
). And I'm not even sure I can fully recommend downloading from Sourceforge given its reputation these days.
At any rate, the sources are
this download and build instructions are (from the readme):
$ mkdir build
$ cd build
$ cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr ..
$ make
$ make install
I have no idea about Windows, honestly. Haven't done Windows dev in ages and C++ is a royal pain on Windows.
If you're just looking for the learning experience or the likes, have fun. But if you're wanting to contribute, I suggest contributing to MegaGlest instead. Git repo:
https://github.com/MegaGlest/megaglest-source