update to use zig for cross-build

- darwin builds are broken: ziglang/zig#20689
- windows arm build also broken

Makefile

@@ -1,25 +1,69 @@
-.PHONY: build build-386 build-amd64 build-arm build-arm64 build-all test test-integration test-all bench clean vet fmt
+.PHONY: build build-386 build-amd64 build-arm build-arm64 build-all test test-integration \
+	test-all bench clean vet fmt
 
 PACKAGE_NAME    := github.com/keygen-sh/keygen-relay
 PACKAGE_VERSION := $(shell cat VERSION)
-LD_FLAGS        := "-s -w -X $(PACKAGE_NAME)/cli.Version=$(PACKAGE_VERSION)"
+PACKAGE_CHANNEL  = stable
+
+ifeq ($(findstring -rc.,$(PACKAGE_VERSION)), -rc.)
+	PACKAGE_CHANNEL = rc
+else ifeq ($(findstring -beta.,$(PACKAGE_VERSION)), -beta.)
+	PACKAGE_CHANNEL = beta
+else ifeq ($(findstring -alpha.,$(PACKAGE_VERSION)), -alpha.)
+	PACKAGE_CHANNEL = alpha
+else ifeq ($(findstring -dev.,$(PACKAGE_VERSION)), -dev.)
+	PACKAGE_CHANNEL = dev
+endif
+
+BUILD_LDFLAGS := "-s -w -X $(PACKAGE_NAME)/cli.Version=$(PACKAGE_VERSION)"
+BUILD_FLAGS    =
+
+ifdef DEBUG
+	BUILD_FLAGS += -x
+endif
 
 build:
-	go build -ldflags $(LD_FLAGS) -o bin/relay ./cmd/relay
+	go build -ldflags $(BUILD_LDFLAGS) -o bin/relay ./cmd/relay
+
+build-linux-386:
+	CGO_ENABLED=1 GOOS=linux GOARCH=386 CC="zig cc -target x86-linux" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_linux_386 ./cmd/relay
+
+build-linux-amd64:
+	CGO_ENABLED=1 GOOS=linux GOARCH=amd64 CC="zig cc -target x86_64-linux" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_linux_amd64 ./cmd/relay
+
+build-linux-arm:
+	CGO_ENABLED=1 GOOS=linux GOARCH=arm GOARM=7 CC="zig cc -target arm-linux-gnueabihf" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_linux_arm ./cmd/relay
+
+build-linux-arm64:
+	CGO_ENABLED=1 GOOS=linux GOARCH=arm64 CC="zig cc -target aarch64-linux" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_linux_arm64 ./cmd/relay
+
+build-darwin-amd64:
+	CGO_ENABLED=1 GOOS=darwin GOARCH=amd64 CC="zig cc -target x86_64-macos" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_darwin_amd64 ./cmd/relay
+
+build-darwin-arm64:
+	CGO_ENABLED=1 GOOS=darwin GOARCH=arm64 CC="zig cc -target aarch64-macos" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_darwin_arm64 ./cmd/relay
+
+build-windows-386:
+	CGO_ENABLED=1 GOOS=windows GOARCH=386 CC="zig cc -target x86-windows" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_windows_386.exe ./cmd/relay
+
+build-windows-amd64:
+	CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC="zig cc -target x86_64-windows" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_windows_amd64.exe ./cmd/relay
 
-build-386:
-	CGO_ENABLED=1 GOOS=linux GOARCH=386 go build -ldflags $(LD_FLAGS) -o dist/relay_linux_386 ./cmd/relay
+build-windows-arm:
+	CGO_ENABLED=1 GOOS=windows GOARCH=arm GOARM=7 CC="zig cc -target arm-windows-gnueabihf" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_windows_arm.exe ./cmd/relay
 
-build-amd64:
-	CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -ldflags $(LD_FLAGS) -o dist/relay_linux_amd64 ./cmd/relay
+build-windows-arm64:
+	CGO_ENABLED=1 GOOS=windows GOARCH=arm64 CC="zig cc -target aarch64-windows" go build $(BUILD_FLAGS) -ldflags $(BUILD_LDFLAGS) -o dist/relay_windows_arm64.exe ./cmd/relay
 
-build-arm:
-	CGO_ENABLED=1 GOOS=linux GOARCH=arm GOARM=7 CC=arm-linux-gnueabihf-gcc go build -ldflags $(LD_FLAGS) -o dist/relay_linux_arm ./cmd/relay
+build-install:
+	cp scripts/install.sh dist/install.sh
 
-build-arm64:
-	CGO_ENABLED=1 GOOS=linux GOARCH=arm64 CC=aarch64-linux-gnu-gcc go build -ldflags $(LD_FLAGS) -o dist/relay_linux_arm64 ./cmd/relay
+build-version:
+	cp VERSION dist/version
 
-build-all: clean build-386 build-amd64 build-arm build-arm64
+build-all: clean build-linux-386 build-linux-amd64 build-linux-arm build-linux-arm64 build-darwin-amd64 \
+	build-darwin-arm64 build-windows-386 build-windows-amd64 build-windows-arm build-windows-arm64 \
+	build-install build-version
 
 test:
 	go test -race ./...