[ci] aarch64 cross-compilation still broken with non-gold linkers

Author: dilyevsky

ci/main.go

@@ -27,17 +27,21 @@ import (
 
 type ApoxyCli struct{}
 
-func hostArch() string {
-switch runtime.GOARCH {
+func canonArchFromGoArch(goarch string) string {
+switch goarch {
 case "amd64":
 return "x86_64"
 case "arm64":
 return "aarch64"
 default:
-return runtime.GOARCH
+return goarch
 }
 }
 
+func hostArch() string {
+return canonArchFromGoArch(runtime.GOARCH)
+}
+
 // BuilderContainer builds a CLI binary.
 func (m *ApoxyCli) BuilderContainer(ctx context.Context, src *dagger.Directory) *dagger.Container {
 return dag.Container().
@@ -192,10 +196,17 @@ func (m *ApoxyCli) BuildBackplane(
 WithMountedCache("/go/pkg/mod", dag.CacheVolume("go-mod-"+goarch)).
 WithEnvVariable("GOMODCACHE", "/go/pkg/mod").
 WithMountedCache("/go/build-cache", dag.CacheVolume("go-build-"+goarch)).
-WithEnvVariable("GOCACHE", "/go/build-cache").
-WithEnvVariable("CGO_ENABLED", "1").
-WithExec([]string{"go", "build", "-o", bpOut, "./cmd/backplane"}).
-WithExec([]string{"go", "build", "-o", dsOut, "./cmd/dial-stdio"})
+WithEnvVariable("GOCACHE", "/go/build-cache")
+
+if goarch == "amd64" {
+builder = builder.
+WithEnvVariable("CGO_ENABLED", "1").
+WithEnvVariable("CC", fmt.Sprintf("zig cc --target=%s-linux-musl", canonArchFromGoArch(goarch)))
+}
+
+builder = builder.
+WithExec([]string{"go", "build", "-ldflags", "-v -linkmode=external", "-o", bpOut, "./cmd/backplane"}).
+WithExec([]string{"go", "build", "-ldflags", "-v -linkmode=external", "-o", dsOut, "./cmd/dial-stdio"})
 
 runtimeCtr := m.PullEdgeRuntime(ctx, platform)
 
@@ -229,7 +240,10 @@ func (m *ApoxyCli) PublishImages(
 fmt.Println("API server image published to", addr)
 
 var bCtrs []*dagger.Container
-for _, platform := range []string{"linux/amd64", "linux/arm64"} {
+// TODO(dilyevsky): When Go team finally gets around fixing their
+// https://github.com/golang/go/issues/22040 hack, we can enable arm64
+// builds in CI.
+for _, platform := range []string{"linux/amd64" /* "linux/arm64", */} {
 bCtr := m.BuildBackplane(ctx, src, platform)
 bCtrs = append(bCtrs, bCtr)
 }