[Bug libstdc++/21549] Configure options hard to find

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21549

--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Confirmed, --with-pic being documented would be very nice even though it is
> a generic libtool 
> configure option, it is most used with libstdc++ as shown by the bug reports
> about the using static 
> libstdc++ in a shared library.

Note that documenting it has the risk of leading people to think that
--with-pic (or --without-pic) is ok to use even in situations when it's not;
e.g. x86_64 must always be PIC. If the flag is going to be documented, any such
restrictions should be documented as well.