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make: *** No rule to make target 'test'.  Stop.

Dammit, I always forget about that one. You need (an ancient version of) cxxtest. I placed the version that I'm using right now here. This is not an official version of cxxtest.

Leaving away test appeared to work. After the installation I have all the binaries in the cn2g-build/result/bin folder, but c2ng itself is missing. Any ideas?

This probably means you do not have libSDL installed. On Debian, you need the packages libsdl2-2.0-0, libsdl2-dev, libsdl2-image-2.0-0, libsdl2-image-dev. Alternatively, if you want to go with the old SDL1, libsdl-image1.2, libsdl-image1.2-dev, libsdl1.2-dev, libsdl1.2debian. When you run Make.pl, it should tell you what it found.

Otherwise, congratulation that you made it that far. The build process is much too complex for my taste.

--Stefan