I suspect not, but I would like to see such recommended and/or
suggested packages. Back when I was using Cygwin gcc so I could
learn C, m4 was not installed along with it, and I believe that m4
should at least be shown as a recommended package to go along with
gcc.
There is no reason to include m4 as a gcc dependency if you are trying
to learn C. This would not even be a case of a suggestion. If you
needed m4 for some reason (maybe for autoconf/automake) that really
would be a case where you need to install m4 separately. You can use
gcc quite happily without having m4 installed.
For the record, I don't think Yaakov, Corinna, or I are really
interested in spending our time adding some sort of suggestion mechanism
to setup.exe. This would have ramifications both for setup.exe, for the
script which updates setup.ini, and for the genini script. It would
likely be a fair amount of work.
Given the fact that this has come up repeatedly over the years I am
pretty sure that repeated suggestions that setup.exe should be modified
to do this are likely not going to have any effect.