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, 89 insertions, 0 deletions

diff --git a/libgo/runtime/go-main.c b/libgo/runtime/go-main.c
new file mode 100644
index 00000000000..a6dbf347fb0
--- /dev/null
+++ b/libgo/runtime/go-main.c
@@ -0,0 +1,89 @@
+/* go-main.c -- the main function for a Go program.
+
+   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 "config.h"
+
+#include <stdlib.h>
+#include <time.h>
+
+#ifdef HAVE_FPU_CONTROL_H
+#include <fpu_control.h>
+#endif
+
+#include "go-alloc.h"
+#include "array.h"
+#include "go-signal.h"
+#include "go-string.h"
+
+#include "runtime.h"
+#include "malloc.h"
+
+#undef int
+#undef char
+#undef unsigned
+
+/* The main function for a Go program.  This records the command line
+   parameters, calls the real main function, and returns a zero status
+   if the real main function returns.  */
+
+extern char **environ;
+
+extern struct __go_open_array Args asm ("libgo_os.os.Args");
+
+extern struct __go_open_array Envs asm ("libgo_os.os.Envs");
+
+/* These functions are created for the main package.  */
+extern void __go_init_main (void);
+extern void real_main (void) asm ("main.main");
+
+/* The main function.  */
+
+int
+main (int argc, char **argv)
+{
+  int i;
+  struct __go_string *values;
+
+  runtime_mallocinit ();
+  __go_gc_goroutine_init (&argc);
+
+  Args.__count = argc;
+  Args.__capacity = argc;
+  values = __go_alloc (argc * sizeof (struct __go_string));
+  for (i = 0; i < argc; ++i)
+    {
+      values[i].__data = (unsigned char *) argv[i];
+      values[i].__length = __builtin_strlen (argv[i]);
+    }
+  Args.__values = values;
+
+  for (i = 0; environ[i] != NULL; ++i)
+    ;
+  Envs.__count = i;
+  Envs.__capacity = i;
+  values = __go_alloc (i * sizeof (struct __go_string));
+  for (i = 0; environ[i] != NULL; ++i)
+    {
+      values[i].__data = (unsigned char *) environ[i];
+      values[i].__length = __builtin_strlen (environ[i]);
+    }
+  Envs.__values = values;
+
+  __initsig ();
+
+#if defined(HAVE_SRANDOM)
+  srandom ((unsigned int) time (NULL));
+#else
+  srand ((unsigned int) time (NULL));
+#endif
+  __go_init_main ();
+
+  __go_enable_gc ();
+
+  real_main ();
+
+  return 0;
+}