Add Go frontend, libgo library, and Go testsuite.

gcc/:
	* gcc.c (default_compilers): Add entry for ".go".
	* common.opt: Add -static-libgo as a driver option.
	* doc/install.texi (Configuration): Mention libgo as an option for
	--enable-shared.  Mention go as an option for --enable-languages.
	* doc/invoke.texi (Overall Options): Mention .go as a file name
	suffix.  Mention go as a -x option.
	* doc/frontends.texi (G++ and GCC): Mention Go as a supported
	language.
	* doc/sourcebuild.texi (Top Level): Mention libgo.
	* doc/standards.texi (Standards): Add section on Go language.
	Move references for other languages into their own section.
	* doc/contrib.texi (Contributors): Mention that I contributed the
	Go frontend.
gcc/testsuite/:
	* lib/go.exp: New file.
	* lib/go-dg.exp: New file.
	* lib/go-torture.exp: New file.
	* lib/target-supports.exp (check_compile): Match // Go.

From-SVN: r167407

1 files changed, 38 insertions, 0 deletions

diff --git a/libgo/runtime/thread.c b/libgo/runtime/thread.c
new file mode 100644
index 0000000..5651217
--- /dev/null
+++ b/libgo/runtime/thread.c
@@ -0,0 +1,38 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "runtime.h"
+
+void
+runtime_initlock(Lock *l)
+{
+	if(pthread_mutex_init(&l->mutex, NULL) != 0)
+		runtime_throw("pthread_mutex_init failed");
+}
+
+void
+runtime_lock(Lock *l)
+{
+	if(pthread_mutex_lock(&l->mutex) != 0)
+		runtime_throw("lock failed");
+}
+
+void
+runtime_unlock(Lock *l)
+{
+	if(pthread_mutex_unlock(&l->mutex) != 0)
+		runtime_throw("unlock failed");
+}
+
+void
+runtime_destroylock(Lock *l)
+{
+	pthread_mutex_destroy(&l->mutex);
+}
+
+bool
+runtime_trylock(Lock *l)
+{
+	return pthread_mutex_trylock(&l->mutex) == 0;
+}