If you have the sources it is dead easy to compile whatever packages rpm or deb from them. Or just do "make install" without creating the package at all...

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This all of course is only relevant if you are compiling a console application.
If you want to port a GUI application from another platform then it gets trickier; just like @peterleinchen points out you can only recompile something that uses the same SW stack on the frontend or else there's going to be a lot to change.