kubernetes: Cloud-controller-manager won't build for out-of-tree external providers

What happened:

panic: failed to find flag in global flagset (flag): cloud-provider-gce-lb-src-cidrs

goroutine 1 [running]: k8s.io/component-base/cli/globalflag.Register(0xc0000ba900, 0x17df195, 0x1f) /home/neil/Go/pkg/mod/k8s.io/component-base@v0.0.0-20190405092941-79a63e28c077/cli/globalflag/globalflags.go:66 +0x1a9 k8s.io/kubernetes/cmd/cloud-controller-manager/app.NewCloudControllerManagerCommand(0xc00008e150) /home/neil/Go/pkg/mod/k8s.io/kubernetes@v1.14.0/cmd/cloud-controller-manager/app/controllermanager.go:91 +0x438 main.main() /home/neil/Dev/brightbox-cloud-controller-manager/main.go:39 +0x90

What you expected to happen:

The controller should run and stop with a ‘–cloud-provider cannot be empty’ message

How to reproduce it (as minimally and precisely as possible):

Follow the out of tree instructions here https://kubernetes.io/docs/tasks/administer-cluster/developing-cloud-controller-manager/

Comment out the _ “k8s.io/kubernetes/pkg/cloudprovider/providers” import line and build the cloud-controller-manager

Anything else we need to know?:

This worked fine prior to 1.14.0

Environment:

• Kubernetes version (use kubectl version): lient Version: version.Info{Major:“1”, Minor:“14”, GitVersion:“v1.14.0”, GitCommit:“641856db18352033a0d96dbc99153fa3b27298e5”, GitTreeState:“clean”, BuildDate:“2019-03-25T15:53:57Z”, GoVersion:“go1.12.1”, Compiler:“gc”, Platform:“linux/amd64”} Server Version: version.Info{Major:“1”, Minor:“14”, GitVersion:“v1.14.0”, GitCommit:“641856db18352033a0d96dbc99153fa3b27298e5”, GitTreeState:“clean”, BuildDate:“2019-03-25T15:45:25Z”, GoVersion:“go1.12.1”, Compiler:“gc”, Platform:“linux/amd64”}
• Cloud provider or hardware configuration: Brightbox
• OS (e.g: cat /etc/os-release): Ubuntu 18.04.2 LTS
• Kernel (e.g. uname -a): Linux bionic-vm 4.15.0-47-generic #50-Ubuntu SMP Wed Mar 13 10:44:52 UTC 2019 x86_64 x86_64 x86_64 GNU/Linu
• Install tools: kubeadm
• Others: