Re: [Openexr-devel] Compiling on MinGW

[Giuseppe Rota]

It seems like the problem is in the building of IlmThread itself. We
cannot complete the linking step: there are a lot of undefined
references (see attachment). Could this be a problem with the
autotools, maybe?
(The attachment was "purged" due to the size limits of attachments of the ML)
As far as using the precompiled DLLs is concerned,
I tried but I was not able to link against them: I had the same problem
with the win32 native build of ImageMagick, and they told me that it
was a problem of name mangling of the compiler.
Giuseppe

On 12/20/06, Florian Kainz <address@hidden> wrote:

I must admit that I don't know anything about minGW, but maybe
the following helps:

The IlmThread library will be built even if you disable threading.
It will contain dummy implementations for threads, mutexes and
semaphores.  Creating a thread always throws an exception, and
attempts to lock mutexes and semaphores always succeed.

The IlmImf library should work even with the dummy IlmThread
implementation, as long as you don't enable threading.  You should
be able to compile and link the IlmImfTest executable.  When you
run the executable, any tests that involve multithreading will
fail, but that doesn't necessarily mean that the IlmImf library
is broken.  The tests should run to completion if you comment out
all calls to setGlobalThreadCount() in test*.cpp.

Alternatively, can your application be linked against DLLs from a
native Windows build?  OpenEXR comes with Visual C++ project files,
and threading does work on Windows.

Florian



Paul Gregory wrote:
> Hi All,
>
> I've been trying to get OpenEXR to compile on MinGW for some time now so
> that we (the Aqsis team) can release a version of Aqsis that supports
> OpenEXR on both Windows and Posix. However, as others have found on this
> list, it doesn't seem that OpenEXR is well setup to compile on MinGW.
>
> The main stumbling block I've hit so far is threading, I've tried to
> fool it into using the Win32 threading code, no joy, I've tried to
> install and get it to use the Win32 port of pthreads, again no joy. The
> wierdest of all is that --disable-threading doesn't actually seem to
> disable threading, it still tries and fails to build the IlmThread
> project of ilmbase. I've hit these problems with both the stable 1.4.0
> source archive, and the newer split 1.5.0 of OpenEXR and 0.9.0 IlmBase
> source archive.
>
> If anyone has any suggestions on how to get this all to compile on
> MinGW/MSYS, it would be most appreciated.
>
> Thanks
>
> --
> Paul Gregory
> http://www.aqsis.org
>
>
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>
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