1 files changed, 15 insertions, 0 deletions
diff --git a/src/cmd/oldlink/internal/ld/outbuf_nommap.go b/src/cmd/oldlink/internal/ld/outbuf_nommap.go
new file mode 100644
index 0000000000..fba8cd8bc4
--- /dev/null
+++ b/src/cmd/oldlink/internal/ld/outbuf_nommap.go
@@ -0,0 +1,15 @@
+// Copyright 2019 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.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!openbsd,!windows
+
+package ld
+
+import "errors"
+
+var errNotSupported = errors.New("mmap not supported")
+
+func (out *OutBuf) Mmap(filesize uint64) error { return errNotSupported }
+func (out *OutBuf) Munmap()                    { panic("unreachable") }
+func (out *OutBuf) Msync() error               { panic("unreachable") }