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, 33 insertions, 0 deletions

diff --git a/libgo/runtime/go-close.c b/libgo/runtime/go-close.c
new file mode 100644
index 0000000..ced7429
--- /dev/null
+++ b/libgo/runtime/go-close.c
@@ -0,0 +1,33 @@
+/* go-close.c -- the builtin close function.
+
+   Copyright 2009 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 "go-assert.h"
+#include "channel.h"
+
+/* Close a channel.  After a channel is closed, sends are no longer
+   permitted.  Receives always return zero.  */
+
+void
+__go_builtin_close (struct __go_channel *channel)
+{
+  int i;
+
+  i = pthread_mutex_lock (&channel->lock);
+  __go_assert (i == 0);
+
+  while (channel->selected_for_send)
+    {
+      i = pthread_cond_wait (&channel->cond, &channel->lock);
+      __go_assert (i == 0);
+    }
+
+  channel->is_closed = 1;
+
+  i = pthread_cond_broadcast (&channel->cond);
+  __go_assert (i == 0);
+
+  __go_unlock_and_notify_selects (channel);
+}