Just to let everyone know, the build system is almost complete :lol:.
make clean|distclean|dist is now working.
It also works for in-place builds, as well as out-of-place.
The only thing left is correct discovery of the XRC library, where it applies (it must exist for wx2.4, but not for wx2.6 in which it is embedded *but* only if wx2.6 was built with --enable-xrc). Also, haven't checked with unicode versions but it *should* work.