build error on mingw if pthreads is installed

(error from #ghc, by McManiaC)

The build error is this,

In file included from \mingw\lib\gcc\mingw32\..\..\..\include\pthread.h:288:0:
    0,
                     from includes/rts/OSThreads.h:30,
                     from includes/Rts.h:178,
                     from rts\Adjustor.c:40:

\mingw\lib\gcc\mingw32\..\..\..\include\sched.h:152:53:
     error: expected ')' before 'pid'

\mingw\lib\gcc\mingw32\..\..\..\include\sched.h:154:53:
     error: expected ')' before 'pid'
make[1]: *** [rts/dist/build/Adjustor.thr_o] Error 1
make: *** [all] Error 2

From the error location in OSThreads.h we can conclude that HAVE_PTHREAD_H is set but WANT_NATIVE_WIN32_THREADS isn't.

So this happens if configure finds pthreads (compare ftp://sourceware.org/pub/pthreads-win32/sources/pthreads-w32-2-8-0-release/sched.h).

Perhaps the old build system used to set WANT_NATIVE_WIN32_THREADS when it detected mingw?

Trac metadata

Trac field	Value
Version	7.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Build System
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