🚀 go-pugleaf

I'm interested in developing some software which I do not
wish to put under the GPL.  I have 2 questions:

1.  If I wish to distribute my source code, and I want to
distribute some makefiles which work under gmake but not
make, is that legal?  Can I also include a distribution
of GNU make?  As far as I can tell from reading the license,
(although I'm most certainly not a lawyer), I can include
an executable of GNU make, as long as I also include the complete
source distribution.

2.  bison and flex:  Am I allowed to release an executable
that was generated from bison and flex?  I seem to recall
that an executable generated by gcc could be released under
any license, and so I imagine the same would be true of an
executable generated from bison and flex, but once again,
I'm not at all sure.  I imagine that the question as to
whether I could release the source grammars with executables
for bison and flex would be answered the same way that #1 would
be...

If there's some legal FAQ which explains the license, without
being written for lawyers, I'd appreciate some pointers...

Thanks a lot!

Mike