Cross-compiling a static binary from GitHub Actions

[kinke]

On Saturday, 25 September 2021 at 19:31:40 UTC, Vladimir 
Panteleev wrote:
> 2. It's slow (about 8x). Probably don't try to build LLVM 
> inside it.

Lol yeah - I used to build LLVM in qemu for armhf, that took like 
3 full days. Later qemu versions seemed to be able to use 3 host 
CPU cores for emulating 3 virtual cores => down to 'only' 24 
hours. ;)