我正在构建下面这个简单得可笑的go程序

package main

import (
    "context"
    "flag"
    "fmt"
    "log"

    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    "k8s.io/client-go/kubernetes"
    _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
    "k8s.io/client-go/tools/clientcmd"
    "k8s.io/client-go/util/homedir"
)

const namespace = "default"

func main() {
    home := homedir.HomeDir()
    defaultKubeConfigPath := fmt.Sprintf("%s/%s", home, ".kube/config")
    kubeconfig := flag.String("kubeconfig", defaultKubeConfigPath, "location to kubeconfig file")
    config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
    if err != nil {
        panic(err)
    }
    clientset, err := kubernetes.NewForConfig(config)
    if err != nil {
        log.Fatal(err)
    }
    pods, err := clientset.CoreV1().Pods(namespace).List(context.TODO(), metav1.ListOptions{})
    if err != nil {
        panic(err)
    }
    for i := range pods.Items {
        fmt.Printf("%s\n", pods.Items[i].Name)
    }

    deployments, err := clientset.AppsV1().Deployments(namespace).List(context.TODO(), metav1.ListOptions{})
    if err != nil {
        panic(err)
    }
    for i := range deployments.Items {
        fmt.Printf("%s\n", deployments.Items[i].Name)
    }
}

使用以下Dockerfile

FROM golang:1.19.2-alpine3.15 as builder

COPY src /src

WORKDIR /src

RUN go build -race -ldflags "-s -w" -a -o client-go

FROM scratch

COPY --from=builder client-go /client-go

ENTRYPOINT [ "./client-go" ]

生成失败，如下所示：

# 8 21.92 # runtime/cgo

# 8 21.92 cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in $PATH

既然我没有使用任何cgo扩展，那么到底在哪里需要gcc？
是否有一种先验的方法来确定何时需要gcc for cgo？