go/build: allow colon in #cgo flags

This makes it possible to say -I c:/foo on Windows.

Fixes #2683 comment #3.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5540043

diff --git a/src/pkg/go/build/dir.go b/src/pkg/go/build/dir.go
index 265261f22eaaac2c71c7f43290a343a7b765f423..7f2475429841a5ea0910c72404289bf98bb7cda3 100644 (file)
--- a/src/pkg/go/build/dir.go
+++ b/src/pkg/go/build/dir.go
@@ -476,7 +476,7 @@ func (ctxt *Context) saveCgo(filename string, di *DirInfo, cg *ast.CommentGroup)
        return nil
 }
 
-var safeBytes = []byte("+-.,/0123456789=ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz")
+var safeBytes = []byte("+-.,/0123456789=ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz:")
 
 func safeName(s string) bool {
        if s == "" {