[dev.cc] cmd/dist: adjust for build process without cmd/cc

[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]

- Remove references to C compiler directories.
- Remove generation of special header files.
- Remove generation of Go source files from C declarations.

- Compile Go sources before rest of package (was after),
  so that Go compiler can write go_asm.h for use in assembly.

- Move TLS information from cmd/dist (was embedding in output)
  to src/runtime/go_tls.h, which it can be maintained directly.

LGTM=r
R=r, dave
CC=austin, golang-codereviews, iant, khr
https://golang.org/cl/172960043

2 files changed, 22 insertions, 15 deletions

diff --git a/src/runtime/defs.c b/src/runtime/defs.c
deleted file mode 100644
index b0a9b20d7f..0000000000
--- a/src/runtime/defs.c
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2013 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.
-
-// This file is compiled by cmd/dist to obtain debug information
-// about the given header files.
-
-#include "runtime.h"
-#include "arch_GOARCH.h"
-#include "malloc.h"
-#include "type.h"
-#include "race.h"
-#include "chan.h"
-#include "defs_GOOS_GOARCH.h"
-#include "os_GOOS.h"
diff --git a/src/runtime/go_tls.h b/src/runtime/go_tls.h
new file mode 100644
index 0000000000..6a707cf1e8
--- /dev/null
+++ b/src/runtime/go_tls.h
@@ -0,0 +1,22 @@
+// Copyright 2014 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.
+
+#ifdef GOARCH_arm
+#define LR R14
+#endif
+
+#ifdef GOARCH_amd64
+#define	get_tls(r)	MOVQ TLS, r
+#define	g(r)	0(r)(TLS*1)
+#endif
+
+#ifdef GOARCH_amd64p32
+#define	get_tls(r)	MOVL TLS, r
+#define	g(r)	0(r)(TLS*1)
+#endif
+
+#ifdef GOARCH_386
+#define	get_tls(r)	MOVL TLS, r
+#define	g(r)	0(r)(TLS*1)
+#endif