How to cross-compile?

[dangbo08]

Hello, I want to cross-compile this project into my arm single chip computer to achieve the effect of nvr in openipc. Since the video display interface of nvr is not the effect I want, I want to cross-compile and then redesign the video display and reasonably plan the data display of flight control. However, I always encounter the problem of cross-compilation environment when compiling, so I have been unable to succeed, so I would like to ask if you have relevant solutions, please teach me if you have, thank you very much ！！！

[svpcom]

User docker + qemu-static. See deb_docker target in the makefile. But default it do cross-build for RPI (arm32)
Also see .github/workflows/build*.yml. It do automatic cross-builds for all support platforms