[FAB-12167] build scc plugins with race as needed

Change-Id: Ifc4e66de1bf0ce3c67d84e736f5871b67a4439e9
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>

core/scc/loadsysccs_test.go

@@ -59,8 +59,16 @@ func TestLoadSCCPluginInvalid(t *testing.T) {
 	assert.Panics(t, func() { loadPlugin("missing.so") }, "expected panic with invalid path")
 }
 
+// raceEnabled is set to true when the race build tag is enabled.
+// see race_test.go
+var raceEnabled bool
+
 func buildExamplePlugin(t *testing.T, path, pluginPackage string) {
-	cmd := exec.Command("go", "build", "-tags", goBuildTags, "-o", path, "-buildmode=plugin", pluginPackage)
+	cmd := exec.Command("go", "build", "-tags", goBuildTags, "-o", path, "-buildmode=plugin")
+	if raceEnabled {
+		cmd.Args = append(cmd.Args, "-race")
+	}
+	cmd.Args = append(cmd.Args, pluginPackage)
 	output, err := cmd.CombinedOutput()
 	if err != nil {
 		t.Fatalf("Error: %s, Could not build plugin: %s", err, output)

core/scc/race_test.go

@@ -0,0 +1,14 @@
+// +build race
+// +build pluginsenabled,cgo
+// +build darwin,go1.10 linux,go1.10 linux,go1.9,!ppc64le
+
+/*
+Copyright IBM Corp. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+package scc
+
+func init() {
+	raceEnabled = true
+}