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How does the golang-crosscompile helper script handle ARM v5, v6, v7, and v8 support


The `golang-crosscompile` helper script handles ARM v5, v6, v7, and v8 support by setting the `GOARM` and `GOARCH` environment variables accordingly. Here's how it handles each version:

ARMv5 Support

- The `golang-crosscompile` script sets `GOARM=5` to compile Go programs for ARMv5 architecture.
- This is supported by Go 1.1 and later versions.

ARMv6 Support

- The script sets `GOARM=6` to compile Go programs for ARMv6 architecture.
- This is also supported by Go 1.1 and later versions.

ARMv7 Support

- The script sets `GOARM=7` to compile Go programs for ARMv7 architecture.
- This is supported by Go 1.1 and later versions.

ARMv8 Support

- The script sets `GOARCH=arm64` to compile Go programs for ARMv8 architecture.
- This is supported by Go 1.1 and later versions.

Handling Different Architectures

- The script uses the `GOARCH` variable to specify the target architecture.
- For ARMv5, ARMv6, and ARMv7, `GOARCH=arm` is used.
- For ARMv8, `GOARCH=arm64` is used.

Handling Different Operating Systems

- The script uses the `GOOS` variable to specify the target operating system.
- For Linux, `GOOS=linux` is used.
- For Darwin (macOS), `GOOS=darwin` is used.

Example Usage

- Here is an example of how to use the `golang-crosscompile` script to cross-compile a Go program for ARMv7:
bash
  GOPATH=/home/xrfang/git/hermes/ GOARM=7 GOARCH=arm go build .
  

Conclusion

- The `golang-crosscompile` helper script simplifies the process of cross-compiling Go programs for different operating systems and architectures, including ARMv5, v6, v7, and v8.
Citations:
[1] https://forum.syncthing.net/t/armv5-cross-compile-error/11014
[2] https://opensource.com/article/21/1/go-cross-compiling
[3] https://groups.google.com/g/golang-nuts/c/o25uLLJU6jY
[4] https://go.dev/wiki/GoArm
[5] https://stackoverflow.com/questions/45835134/cross-compile-to-armv7-failed