Also build linux-arm64, linux-ppc64, linux-ppc64le

build.go

@@ -64,7 +64,7 @@ func main() {
 	flag.Parse()
 
 	switch goarch {
-	case "386", "amd64", "arm":
+	case "386", "amd64", "arm", "arm64", "ppc64", "ppc64le":
 		break
 	default:
 		log.Printf("Unknown goarch %q; proceed with caution!", goarch)

build.sh

@@ -77,7 +77,7 @@ case "${1:-default}" in
 		platforms=(
 			darwin-amd64 dragonfly-amd64 freebsd-amd64 linux-amd64 netbsd-amd64 openbsd-amd64 solaris-amd64 windows-amd64
 			freebsd-386 linux-386 netbsd-386 openbsd-386 windows-386
-			linux-arm
+			linux-arm linux-arm64 linux-ppc64 linux-ppc64le
 		)
 
 		for plat in "${platforms[@]}"; do