Forcing Eclipse to generate standard Unix makefiles
I ended up just creating a CMake project by hand. CMake files are really not that hard to make, and it's a lot easier than trying to get Eclipse to do it for you. Plus, they're cross-platform.
I've been a *nix guy for 25+ years and am a big fan of make. However, making your Eclipse project dependent upon make is going to exclude the Mac and Windows community. Why don't you just export the Eclipse project and open source it as an Eclipse project? Then users can can have it ready to extend if they choose. You didn't specify the language your project is written in, if it's Java (pretty common for Eclipse) why not create an ant build file for the project?
Just a thought.