Hi, I've built a cross-toolchain with gcc 9.1.0 some days ago for a slightly different ARM version, and it works. It's only needed a little change on mtune parameter. If you want, look at my build scripts here: https://sourceforge.net/p/ebye/gitcode/ci/master/tree/eosforge/toolchains/aarch64-vm/release_1.3.x/ BR Emilio
