gcc-configure: Enable the use of different symbol versioning
While the gnu style for symbol versioning is the most usual,
--enable-symvers[=style] can be provided several values,
gnu, gnu-versioned-namespace, darwin, darwin-export, and sun,
depending on users needs.
Introduce the SYMVERS_CONF variable to allow the user to
configure the symbol versioning in shared libraries.
Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandro@enedino.org> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
