GCC and Built-Using
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when they are superseded with a new release.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.