posix-threads.h (PTHREAD_MUTEX_IS_STRUCT): New define.

posix-threads.h (PTHREAD_MUTEX_IS_STRUCT): New define.

	* include/posix-threads.h (PTHREAD_MUTEX_IS_STRUCT): New define.
	(_Jv_PthreadGetMutex): Use it.
	(_Jv_PthreadCheckMonitor): Use new M_COUNT macros.
	(_Jv_MutexInit): Use PTHREAD_MUTEX_IS_STRUCT.
	(_Jv_MutexLock): Likewise.
	(_Jv_MutexUnlock): Likewise.
	* include/config.h.in: Rebuilt.
	* acconfig.h (PTHREAD_MUTEX_HAVE_M_COUNT,
	PTHREAD_MUTEX_HAVE___M_COUNT): New undefs.
	* configure: Rebuilt.
	* libgcj.spec.in: Don't mention INTERPSPEC.
	* configure.in (INTERPSPEC): Removed.
	Only run pthreads-related checks when using POSIX threads.  Check
	for m_count and __m_count in mutex structure.

From-SVN: r29048