Bug#467166: This is not gcc-doc-defaults bug
reassign 467166 gcc
This is not a bug in gcc-doc-defaults package. If gcc-doc is
installed, 'man gcc' works as expected.
The issue is in 'gcc' package, that it does not provide the man page (for
those ugly licensing reasons), and does not give any hints to user on how
to find the documentation.
Not sure if it should be fixed or not.
We may add obvious diversion-based trick (packages from main add stub man
pages that reference the non-free packages, package from non-free divert
those with real man pages) if you think it is appropriate.