How to specify a limited set of languages to build in Debian gcc-{4.6,4.7}?

[Svante Signell <svante.signell@telia.com>]

Hi,

I wonder how to most easily specify a limited set of languages to build
in Debian version of gcc-4.7 for a given architecture. It shows to be
non-trivial, with all these debian/{rules,rules.defs,rules2}, etc, and
adding to that the configure script in src. I would like to enable only
c,c++,go or just go, for testing/porting purposes.

Thanks!