1 files changed, 20 insertions, 0 deletions
diff --git a/src/runtime/race/race.go b/src/runtime/race/race.go
new file mode 100644
index 0000000..9c508eb
--- /dev/null
+++ b/src/runtime/race/race.go
@@ -0,0 +1,20 @@
+// Copyright 2012 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.
+
+//go:build race && ((linux && (amd64 || arm64 || ppc64le || s390x)) || ((freebsd || netbsd || openbsd || windows) && amd64))
+
+package race
+
+// This file merely ensures that we link in runtime/cgo in race build,
+// this in turn ensures that runtime uses pthread_create to create threads.
+// The prebuilt race runtime lives in race_GOOS_GOARCH.syso.
+// Calls to the runtime are done directly from src/runtime/race.go.
+
+// On darwin we always use system DLLs to create threads,
+// so we use race_darwin_$GOARCH.go to provide the syso-derived
+// symbol information without needing to invoke cgo.
+// This allows -race to be used on Mac systems without a C toolchain.
+
+// void __race_unused_func(void);
+import "C"