I have an application in which we use a hand-made build system.The reason for this is portability, the application should be portable on Linux/Mac/Windows.

There are some port-specific files that are not updated by the deafult build system.

What I do now is update the files manually or have a script do this. However I am thinking of switching to cross platform build system like cmake or scons.

Are their associated problems wrt portability? Will it pay in long run? and if so what should be my choice "cmake", "scons" or some other(if any?).

Thanks,