What gcc to use for gdc master?

[Dan Olson via D.gnu]

ketmar <ketmar at ketmar.no-ip.org> writes:

> On Thu, 04 Jun 2015 00:15:37 -0700, Dan Olson wrote:
>
>> Starting a pull request for ARM and grabbed gdc master, but not sure
>> what gcc it likes.  I tried gcc-5.1 but
>> 
>> $ ./setup-gcc.sh ../gcc-5.1.0 found gcc version 5 This version of GCC
>> (5) is not supported.
>
> make sure that you switched to 'gdc-5' branch.

Does gdc-5 get folded back into master then, isn't it a release branch?
I assume pull requests should be based on master?