[Mesa-dev] [PATCH 1/2] mesa: bump required GCC version to 4.4.0

[Timothy Arceri]

On Wed, 2016-01-27 at 11:35 +1100, Jonathan Gray wrote:
> On Tue, Jan 26, 2016 at 02:24:34PM -0800, Matt Turner wrote:
> > On Tue, Jan 26, 2016 at 2:04 PM, Timothy Arceri
> > <timothy.arceri at collabora.com> wrote:
> > > The last time this was bumped we settled on 4.2.0 because OpenBSD
> > > wasn't willing to ship anything greater than 4.2.1 (as that was
> > > the
> > > last GPLv2 licensed version) however they now ship 4.9.3.
> > 
> > I suspect they ship 4.9.3 in ports but 4.2.1 in the base system,
> > and
> > they'll want to build Mesa with 4.2.1 because Mesa is part of the
> > base
> > system. (Excuse the potentially incorrect terminology. I've never
> > used
> > OpenBSD).
> > 
> > Cc'ing Jonathan Gray for clarification.
> 
> Correct.  There are three source trees in OpenBSD.
> 
> src/base, The kernel, libc, libssl, posix utilities etc.
> xenocara, xserver, xterm, Mesa, associated libraries.
> ports/packages,  Makefiles and patches to fetch third party source.
> 
> The src/xenocara trees contain full source ready to
> build.  Installation
> media includes binaries from the src and xenocara trees.  Any
> dependencies
> must be included.  This is why we had a different build system for
> Mesa
> for some time, so as not to to require gnu make or python.
> 
> src/xenocara is built with gcc 4.2.1.  This has in the past been
> patched
> for things like the gnu binary integer constants extension the i965
> code started to require a couple of major Mesa releases ago.  FreeBSD
> also patched their gcc for the same.
> 
> In the long term the base compiler will likely move to llvm for
> architectures where that is possible.  llvm is not in either
> src or xenocara trees currently, so Mesa is not built against llvm.
> Which means no 2d/3d acceleration on radeonsi because of the llvm
> requirement.
> 
> I would be interested to hear specifics as to what post gcc 4.2.1
> extensions/changes people are interested in using.

Well I decided to look at this again after noticing this dicussion in
bugzilla.

https://bugs.freedesktop.org/show_bug.cgi?id=88766

> 
> Jonathan