https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70464
--- Comment #5 from ktkachov at gcc dot gnu.org --- (In reply to georg from comment #0) > During our approach to get the raspberry pi3 and gentoo with an aarch64 > kernel and userland running i tried to cross compile a "native compiler for > aarch64". > > Our attempt succedded, as we got the userland cross compiled and the kernel. > Both are running and seem to be ok, as far as we can tell currently. There > is one core component for gentoo missing: The gcc. > > I tried to cross compile with the added cross compiler script. I used > crossdev to create the amd64 to aarch64 cross compiler. With gcc 5.3.0 i > could create a toolchain which runs on aarch64 but only supports C. No C++. > You can download the folder here: > https://www.schorsch-tech.de/rpi3/cross.tar.bz2 > I usually use the target aarch64-none-linux-gnu, but aarch64-linux-gnu should work too. Note that GCC requires a C++ compiler to build, so trying to use a C-only compiler can't work. If I understand correctly, you want to build an aarch64-to-aarch64 compiler on an x86_64-linux host, and you've only managed to do that for the C frontend? What was the gcc configure line passed to that build (by crossdev, or whatever) Passing "-v" to the C-only gcc would give that information...
