Hi Ralf,
your first suggestion (with the phony target) works great. The second one does not force compilation here (but that doesn't matter anymore since I use the phony target now). As to the third suggestion: I use the __DATE__ and __TIME__ macros in my code as a kind of version information. Therefore the compilation result differs with every compilation, although my source file does not change. Is there yet a better method to store the compilation time stamp in a library without fiddling with make targets? Thank you very much and bye, Benjamin