Yocto and Buildroot will compile, from scratch, an entire gcc crosstool chain with standard library suite and headers to build fast and then deploy to your target. This exists.

▲

drdexebtjl 2 hours ago | parent [-]

I wouldn’t call either of those effortless, though. I’m thinking of something similar to Zig’s DX for cross-compilation.

	▲	jdub an hour ago \| parent [-]
		zig makes cross-compiling easy for a single project - but not everything is zig (or supported by zig cc) the various embedded build systems make cross-compiling easy at scale, which means you often don't need to think about it when adding a new package