Woodruff: Weird architectures weren't supported to begin with

I'm sure you know this already, but the way one does this is to cross-build (or, since that is often difficult, build atop an ARM chroot with binfmt_misc set up to redirect things to qemu-user-arm): this works fine unless your build process requires something like extensive multithreading that qemu-user still does badly (so, 99% of build processes are fine). Then tests, and only tests, are run via ssh to an SBC which shares that chrooted filesystem with the host (and it's not as though OpenGL-capable SBCs are hard to find or costly, though if you want one with open source drivers that might be harder). This is not even slightly new in the embedded world: DejaGNU has long supported this model via its "remote board" concept.