Expliclty set CGO_ENABLED=1 when running go test with race detection. (#1089)

The Go race detector is implemented in C/C++ and requires CGO_ENABLED to work.

However, even if CGO_ENABLED isn't explicitly set, Go assumes CGO_ENABLED=1 by default when:
- C compiler (like gcc) is available
- go env setup allows it (e.g., go env | grep CGO)

This failed on a fresh system without a C compiler.

So if (e.g.,) gcc installed, `go test -race` just quietly uses CGO under the hood.
While this is not needed for local runs, the change makes CGO_ENABLED=1 explicit and
portable (e.g., for containers, CI, or cross compile).

Signed-off-by: Etai Lev Ran <[email protected]>

Author: elevran

Makefile

@@ -130,15 +130,15 @@ vet: ## Run go vet against code.
 
 .PHONY: test
 test: manifests generate fmt vet envtest image-build ## Run tests.
-	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e | grep -v /conformance) -race -coverprofile cover.out
+	CGO_ENABLED=1 KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e | grep -v /conformance) -race -coverprofile cover.out
 
 .PHONY: test-unit
 test-unit: ## Run unit tests.
-	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test ./pkg/... -race -coverprofile cover.out
+	CGO_ENABLED=1 KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test ./pkg/... -race -coverprofile cover.out
 
 .PHONY: test-integration
 test-integration: ## Run integration tests.
-	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test ./test/integration/epp/... -race -coverprofile cover.out
+	CGO_ENABLED=1 KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test ./test/integration/epp/... -race -coverprofile cover.out
 
 .PHONY: test-e2e
 test-e2e: ## Run end-to-end tests against an existing Kubernetes cluster.