PR boehm-gc/21940

	PR boehm-gc/21940
	PR boehm-gc/21942
	* configure.ac (GC_SOLARIS_THREADS): Don't define on *-*-solaris*.
	Use alternate thread library in /usr/lib/lwp.
	* configure: Regenerate.
	* dyn_load.c: Use GC_SOLARIS_PTHREADS.
	* include/gc_config_macros.h (GC_SOLARIS_THREADS): Don't define.
	* include/private/gcconfig.h: Handle 64-bit Solaris 2/x86.
	(GC_SOLARIS_THREADS): Don't define.
	* include/private/solaris_threads.h: Remove.
	* pthread_support.c (GC_thr_init) [GC_SOLARIS_PTHREADS]: Determine
	GC_nprocs via sysconf().
	* Makefile.am (libgcjgc_la_SOURCES): Remove solaris_pthreads.c and
	solaris_threads.c.
	(gctest_LDADD): Use THREADLIBS instead of THREADDLLIBS.
	* Makefile.in: Regenerate.
	* solaris_pthreads.c: Remove.
	* solaris_threads.c: Remove.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@126211 138bc75d-0d04-0410-961f-82ee72b054a4