re PR target/18788 ("-pthreads" option with "-shared" does not cause libpthread.so to be linked in.)

	libjava:
	* configure.ac (*-*-solaris2.8): Use alternate thread library.
	Add libthread.
	(*-*-solaris2.9): Use libthread.
	* configure: Regenerate.

	libgomp:
	* configure.tgt (*-*-solaris2.[56]*): Removed.

	gcc:
	* configure.ac: Don't disable TLS on Solaris 8/9 by default
	Set tga_func for Solaris 2/x86 resp. SPARC.
	Remove duplicate parts of sparc*-sun-solaris2.* TLS check.
	(LIB_THREAD_LDFLAGS_SPEC): Define.
	(LIB_TLS_SPEC): Define.
	Check for required Sun ld version.
	* configure: Regenerate.
	* config.in: Regenerate.
	* config/sol2.h (LIB_SPEC): Use LIB_THREAD_LDFLAGS_SPEC with
	-pthread, -threads, LIB_TLS_SPEC with -pthread.
	* doc/install.texi (Specific, *-*-solaris2*): Document use of
	alternate thread libraries on Solaris 8.
	Document TLS patch requirements.
	* doc/sourcebuild.texi (Add Options): Sort alphabetically.
	Document tls.

	PR target/18788
	* config/sol2.h (LIB_SPEC): Link with thread libraries even with
	-shared.

	gcc/testsuite:
	* lib/target-supports.exp (add_options_for_tls): New proc.
	* g++.dg/tls/static-1.C: Use dg-add-options tls.
	* g++.dg/tls/static-1a.cc: Likewise.
	* gcc.dg/tls/emutls-1.c: Likewise.
	* gcc.dg/tls/opt-11.c: Likewise.
	* gcc.dg/tls/opt-12.c: Likewise.
	* gcc.dg/tls/pr24428-2.c: Likewise.
	* gcc.dg/tls/pr24428.c: Likewise.
	* obj-c++.dg/tls/static-1.mm: Likewise.
	* obj-c++.dg/torture/tls/thr-init-1.mm: Likewise.
	* obj-c++.dg/torture/tls/thr-init-2.mm: Likewise.
	* obj-c++.dg/torture/tls/thr-init-3.mm: Likewise.
	* objc.dg/torture/tls/thr-init-2.m: Likewise.
	* objc.dg/torture/tls/thr-init-3.m: Likewise.
	* objc.dg/torture/tls/thr-init.m: Likewise.
	* gcc.dg/lto/20090210_0.c: Add -pthread for *-*-solaris2.[89].

From-SVN: r162478