GCC and Built-Using

[Ansgar Burchardt <ansgar@debian.org>]

Hi,

several gcc packages seem to use the gcc source code shipped in
gcc-*-source during build, for example gnat-4.6, gnat-4.7 (in NEW),
gdc-4.6 and gcj-4.6.  To provide the full source, the archive has to
make sure to keep the source for those gcc-*-source packages around even
when they are superseded with a new release.  dak does so when the
binary packages indicate what sources to keep around with the new
Built-Using field (Policy 7.8).

Could you please add this field to gcc packages that make use of
gcc-*-source?  #696423 has a patch to add the field to a package, but
gcc itself seems a bit more tricky as it seems to share packaging code
between multiple source packages.

Regards,
Ansgar