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Add support for GOARM parameter when cross compiling
Go can cross compile to older ARM architectures (e.g. v5). In order to do so one needs to use the GOARM parameter as documented in https://github.com/golang/go/wiki/GoArm
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parent
aa333f4d49
commit
e86fb5eedd
12
build.go
12
build.go
@ -193,6 +193,7 @@ func showUsage(output io.Writer) {
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fmt.Fprintf(output, " --enable-cgo use CGO to link against libc\n")
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fmt.Fprintf(output, " --goos value set GOOS for cross-compilation\n")
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fmt.Fprintf(output, " --goarch value set GOARCH for cross-compilation\n")
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fmt.Fprintf(output, " --goarm value set GOARM for cross-compilation\n")
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}
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func verbosePrintf(message string, args ...interface{}) {
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@ -218,13 +219,16 @@ func cleanEnv() (env []string) {
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}
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// build runs "go build args..." with GOPATH set to gopath.
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func build(cwd, goos, goarch, gopath string, args ...string) error {
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func build(cwd, goos, goarch, goarm, gopath string, args ...string) error {
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a := []string{"build"}
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a = append(a, "-asmflags", fmt.Sprintf("-trimpath=%s", gopath))
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a = append(a, "-gcflags", fmt.Sprintf("-trimpath=%s", gopath))
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a = append(a, args...)
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cmd := exec.Command("go", a...)
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cmd.Env = append(cleanEnv(), "GOPATH="+gopath, "GOARCH="+goarch, "GOOS="+goos)
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if goarm != "" {
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cmd.Env = append(cmd.Env, "GOARM="+goarm)
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}
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if !enableCGO {
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cmd.Env = append(cmd.Env, "CGO_ENABLED=0")
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}
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@ -397,6 +401,7 @@ func main() {
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targetGOOS := runtime.GOOS
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targetGOARCH := runtime.GOARCH
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targetGOARM := ""
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var outputFilename string
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@ -430,6 +435,9 @@ func main() {
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case "--goarch":
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skipNext = true
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targetGOARCH = params[i+1]
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case "--goarm":
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skipNext = true
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targetGOARM = params[i+1]
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case "-h":
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showUsage(os.Stdout)
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return
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@ -514,7 +522,7 @@ func main() {
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"-o", output, config.Main,
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}
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err = build(filepath.Join(gopath, "src"), targetGOOS, targetGOARCH, gopath, args...)
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err = build(filepath.Join(gopath, "src"), targetGOOS, targetGOARCH, targetGOARM, gopath, args...)
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if err != nil {
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die("build failed: %v\n", err)
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}
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@ -113,6 +113,8 @@ supply the target OS and platform via the command-line options like this
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$ go run build.go --goos freebsd --goarch 386
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$ go run build.go --goos linux --goarch arm --goarm 6
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The resulting binary is statically linked and does not require any
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libraries.
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