Copy UseSWIG.cmake from the gnuradio repository from commit
4433a7703fe3f5713c2200a0f7c11b13510f34cc
This macro is distributed in the Debian's gnuradio-dev package but it's
not available in Fedora/Centos gnuradio-devel package. The gnuradio's
version contains a fix for the parallel build 99a09af05fda6d0bab0cf3724a1c6bf453c71bc7
and some other improvements as well.
-copied decoding routines from libosmocore to gr-gsm,
-made cmake files entries for new source files and added linking with libosmocodec,
-moved sch.c file to decoding folder.
Better than manually generated python files but still not perfect as it takes many cmake lines to compile single file and grc files are compiled at every run of make.
Removed also old and not working code for building grc files.
Piotr Krysik