id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
4989	build error on mingw if pthreads is installed	int-e	simonmar	"(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?"	bug	closed	high	7.2.1	Build System	7.1	fixed			Windows	Unknown/Multiple	Building GHC failed