FYI, the reason those manpages exist in the first place, is that the GCC Texinfo manual is under the GFDL, and the manpages cpp.1/gcc.1 are automatically generated from it. The FSF advised us (the GCC maintainers) that creating and distributing separate manpages for each of the Invariant Sections was an acceptable alternative to embedding the full text of the Invariant Sections in each manpage.
I'd suggest you deal with this as an instance of the general GFDL issue. zw
