big, bytes: move assembly externs to separate file

to make it easier to build package without assembly.

R=r, r2
CC=golang-dev
https://golang.org/cl/1680045

3 files changed, 9 insertions, 3 deletions

diff --git a/src/pkg/bytes/Makefile b/src/pkg/bytes/Makefile
index b2076c181c..d50e624d6e 100644
--- a/src/pkg/bytes/Makefile
+++ b/src/pkg/bytes/Makefile
@@ -8,6 +8,7 @@ TARG=bytes
 GOFILES=\
 	buffer.go\
 	bytes.go\
+	bytes_decl.go\
 
 OFILES=\
 	asm_$(GOARCH).$O\
diff --git a/src/pkg/bytes/bytes.go b/src/pkg/bytes/bytes.go
index a8ecf3adf9..852e0f8529 100644
--- a/src/pkg/bytes/bytes.go
+++ b/src/pkg/bytes/bytes.go
@@ -103,9 +103,6 @@ func Index(s, sep []byte) int {
 	return -1
 }
 
-// IndexByte returns the index of the first instance of c in s, or -1 if c is not present in s.
-func IndexByte(s []byte, c byte) int // asm_$GOARCH.s
-
 func indexBytePortable(s []byte, c byte) int {
 	for i, b := range s {
 		if b == c {
diff --git a/src/pkg/bytes/bytes_decl.go b/src/pkg/bytes/bytes_decl.go
new file mode 100644
index 0000000000..5d2b9e6393
--- /dev/null
+++ b/src/pkg/bytes/bytes_decl.go
@@ -0,0 +1,8 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bytes
+
+// IndexByte returns the index of the first instance of c in s, or -1 if c is not present in s.
+func IndexByte(s []byte, c byte) int // asm_$GOARCH.s