[Bf-committers] MinGW debug builds do not run

Campbell Barton ideasman42 at gmail.com
Sun Feb 20 14:46:21 CET 2011

IIRC MSVC2008 full version is used for releases,
I have a free MSVC2010 which has a similar problem to MinGW, debug
builds fail to run with strange popup dialog error.

Re Crash on startup:
 If its a crash (not a linking/error message), best not assume blender
is without fault, debug info & call-stack can help a lot in tracking
down these problems.

The IOError define is already in lib/windows, committed shortly after
changing the exception.
I use an update alias which does both repo's before building to
prevent these kinds of errors.

Do you still get the crash on startup?

On Sun, Feb 20, 2011 at 11:54 AM, Peter Kümmel <syntheticpp at gmx.net> wrote:
> On 20.02.2011 04:24, Campbell Barton wrote:
>> Whats supported isn't set in stone, its more a case of which
>> configurations are tested&  known to work.
> OK, thanks. And what is mostly used for the Windows releases?
>> this works for me.
>> - windows xp
>> - mingw-gcc4.5.2, (from mingw's main site)
>> - cmake 2.8 (build type set to Release or RelWithDebInfo)
>> - blender (tested r34959)
> I had a little bit outdated checkout with 4.4, W7-64Bit, and
> problems with release and debug.
>> A crash on startup may be a real bug rather then lack of support, you
>> could run with gdb and see why its crashing.
>> If you are unable to figure out how to fix you could file a bug and
>> include a backtace.
> I assume not really a error in blender code, it's the mixture of
> pre-compiled binaries, compiler used for blender, OS, and runtime
> libraries.
> Best is to build everyting with the same compiler.
>> Another way to help find the cause of the crash is to disable all
>> WITH_* options in cmake configuration, WITH_OPENAL, WITH_IMAGE_OPENEXR
>> ... etc.
>> If this works you could try again with usable settings (so you get an
>> interface),
> I already had the idea to try it without python ;)
>> After that its trial and error to see which library causes the crash,
>> the offending lib could be disabled by default with mingw until its
>> fixed properly.
>> One other thing, you were getting the error 'PyModule_Create2'
>> interestingly I got this error too on Linux when trying to load a
>> library built with a debug python but finding a release library.
> I could link against the lib/windows version with attached patch.
>> On Sat, Feb 19, 2011 at 3:26 PM, Peter Kümmel<syntheticpp at gmx.net>  wrote:
>>> Tested it with cmake too. It links after a small fix, but
>>> crashes immediately after starting. Seems mingw isn't supported.
>>> Peter
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- Campbell

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