I got help from Michael, he suggested:
"If your problem is about the library, I suggest renaming one of the
several pthreads libraries to libpthread.a. "
This helped for me.

Oeyvind

2008/10/2 Rory Walsh <rorywalsh@ear.ie>:
> It's been a long time since I last built Csound with the latest
> sources and I'm getting errors related to pthreads*. It appears as if
> the pthread lib cannot be found even though I have added the correct
> path to the custom.py file. Any ideas? I saw Oeyvind has a similar
> problem back in June but I didn't see a solution posted.
>
> Rory.
>
> *snapshot of output from scons:
>
>  -Wl,--output-def,csound32.def
> Creating library file: libcsound32.a
> Top\csound.o(.text+0x309): In function `kperfThread':
> d:/MyDocuments/SourceCode/Csound5/csound5/Top/csound.c:1141: undefined
> reference to `_imp__pthread_equal'
> Top\threads.o(.text+0x18e): In function `csoundCreateThread':
> d:/MyDocuments/SourceCode/Csound5/csound5/Top/threads.c:198: undefined
> reference to `_imp__pthread_create'
> Top\threads.o(.text+0x1c7): In function `csoundGetCurrentThreadId':
> d:/MyDocuments/SourceCode/Csound5/csound5/Top/threads.c:208: undefined
> reference to `_imp__pthread_self'
> Top\threads.o(.text+0x205): In function `csoundJoinThread':
> d:/MyDocuments/SourceCode/Csound5/csound5/Top/threads.c:217: undefined
> reference to `_imp__pthread_join'
>
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