> You don't infect the host with the toolchain's packages; you install the toolchain's packages in the toolchain chroot. Infect is a too strong word, because n

> You don't infect the host with the toolchain's packages; you install the toolchain's packages in the toolchain chroot. Infect is a too strong word, because normally the cross compiler will coexist well with your system. But you are right about the chroot, throw it away and start again, repeat. That is great! I normally install gcc-arm-linux-gnueabihf + qemu-user-static and enable binfmt. It works well for building armhf, but I can imagine for things like ESP32 where you don't have the toolchain sources and etc.