[Bf-committers] MinGW support

[Martijn Berger]

On Sun, Dec 27, 2015 at 12:25 AM, Yousef Harfoush <bat3a at msn.com> wrote:

> > supporting a proper development environment requires installing visual
> > studio/Windows SDK anyway, so it sort of defeats the purpose of having an
> > "independent" compiler.
> ms is released a c++ environment without the VS IDE, it is not that big
> requirement.
>
> > Only positive thing from MinGW side as far as I know is faster cycles,
> but
> > it's been a while since I tested this. It may be better now with 2013
> > compiler?
>
> but is it not worth 40% render time reduction to support mingw, i mean
> that's is like 2 years of optimizing cycles, isn't it, i think it's better
> to drop vc12 in favor of mingw.
>
> I think the future is more likely to be clang on all platforms. To me
mingw has not been really supported for at least 3 years now, as to me a
supported platform is one that receives actual support from a developer.
For me and I think also for Anthony mingw is one of those perpetual todo
items. There are more important things to do first and that seems to stay
that way.

It is not like mingw is going to be broken an if you feel strongly about it
I would try and contribute but I do not see us gathering the resources
needed for proper support in the short term.



>
> Regards
> Yousef Harfoush
> bat3a at msn.com
>
>
>
> > Date: Sat, 26 Dec 2015 21:30:18 +0100
> > From: kalast at gmail.com
> > To: bf-committers at blender.org
> > Subject: Re: [Bf-committers] MinGW support
> >
> > Hi,
> >
> > Status with openmp as far as I know is fine. The problem with MinGW is
> that
> > supporting a proper development environment requires installing visual
> > studio/Windows SDK anyway, so it sort of defeats the purpose of having an
> > "independent" compiler.
> >
> > * MSVC is needed to compile CUDA binaries
> > * MSVC is needed to run a debug build, since python is lined against the
> > debug libraries of microsoft, not MinGW.
> > * Debugging threads is not so well/natively supported (since pthread
> > library of MinGW is built on top of win32 library)
> >
> > Only positive thing from MinGW side as far as I know is faster cycles,
> but
> > it's been a while since I tested this. It may be better now with 2013
> > compiler?
> > I wouldn't want to spend any more time maintaining this, so if anyone
> wants
> > to take over (supposing we decide it is even worth it) be my guest.
> >
> > On 26 December 2015 at 19:47, Sergey Sharybin <sergey.vfx at gmail.com>
> wrote:
> >
> > > We can not advertise some sort of franken-compiler as an officially
> > > supported. Either the issues are solved in upstream or we don't
> consider
> > > compiler officially supported.
> > >
> > > On Sat, Dec 26, 2015 at 11:44 PM, Yousef Harfoush <bat3a at msn.com>
> wrote:
> > >
> > > > > Date: Sat, 26 Dec 2015 23:08:42 +0500
> > > > > From: sergey.vfx at gmail.com
> > > > > To: bf-committers at blender.org
> > > > > Subject: Re: [Bf-committers] MinGW support
> > > > >
> > > > > If we're going to keep supporting MinGW it should be latest
> official
> > > > > version. I remember we were having major issues with some system
> > > > libraries
> > > > > (mainly threading and OpenMP), so it makes sense to re-evaluate if
> > > those
> > > > > issues are solved form MinGW side before trying to support all the
> > > > > libraries we need.
> > > >
> > > > i use mingw 4.72 with added openmp libs from here:
> > > > http://tdm-gcc.tdragon.net/download
> > > > and threading works properly no crashes, at least in my workflow.
> > > >
> > > >
> > > > Regards
> > > > Yousef Harfoush
> > > > bat3a at msn.com
> > > >
> > > >
> > > >
> > > >
> > > > >
> > > > > On Sat, Dec 26, 2015 at 10:38 PM, alekulyn <alekulyn at gmail.com>
> wrote:
> > > > >
> > > > > > I talked to psyfi over IRC around half a year ago and told him
> I'd
> > > like
> > > > > > to help with this.  There have been several complications along
> the
> > > > way,
> > > > > > such as which MinGW version we should use, rumors that clang was
> > > coming
> > > > > > into the picture, and general inactivity regarding anything
> MinGW.
> > > > > >
> > > > > > As for which MinGW version to use, my conversation with psyfi was
> > > > mainly
> > > > > > about adding libraries to the mingw64_gcc49 branch he started.
> To
> > > that
> > > > > > end, I did compile some libraries with MinGW-W64 GCC 4.9, but I
> must
> > > > > > have deleted them some time ago.
> > > > > >
> > > > > > Anyway, like I told psyfi, I'm willing to help with this.  Just
> need
> > > to
> > > > > > know which MinGW version to use.
> > > > > >
> > > > > > On 12/26/2015 5:12 PM, Sergey Sharybin wrote:
> > > > > > > Hey everyone,
> > > > > > >
> > > > > > > There are some missing precompiled libraries (sndfile,
> opensubdiv,
> > > > OSL)
> > > > > > and
> > > > > > > some misng libraries update (python, SDL, OpenAL)  for MinGW.
> > > > > > >
> > > > > > > This makes MinGW builds quite diverged from the official builds
> > > > > > feature-set
> > > > > > > and lib-version wise, moving MinGW builds to the boundary
> where we
> > > > can't
> > > > > > > call it officially supported anymore.
> > > > > > >
> > > > > > > Additioanlly, svn:externals for mingw folders seems to be
> > > > misconfigured
> > > > > > now
> > > > > > > and needs clean up.
> > > > > > >
> > > > > > > Anyone to have a look and fix all those issues?
> > > > > > >
> > > > > >
> > > > > > _______________________________________________
> > > > > > Bf-committers mailing list
> > > > > > Bf-committers at blender.org
> > > > > > http://lists.blender.org/mailman/listinfo/bf-committers
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > With best regards, Sergey Sharybin
> > > > > _______________________________________________
> > > > > Bf-committers mailing list
> > > > > Bf-committers at blender.org
> > > > > http://lists.blender.org/mailman/listinfo/bf-committers
> > > >
> > > > _______________________________________________
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> > > >
> > >
> > >
> > >
> > > --
> > > With best regards, Sergey Sharybin
> > > _______________________________________________
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> > > http://lists.blender.org/mailman/listinfo/bf-committers
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