Hi Paul, > On 25 Nov 2022, at 20:08, Paul Koning via Gcc <gcc@gcc.gnu.org> wrote: > >> On Nov 25, 2022, at 3:03 PM, Andrew Pinski <pins...@gmail.com> wrote: >> >> On Fri, Nov 25, 2022 at 11:59 AM Paul Koning via Gcc <gcc@gcc.gnu.org> wrote: >>> >>> I'm trying to use fairly recent GCC sources (the gcc-darwin branch to be >>> precise) to build Ada, starting with the latest (2020) release of Gnat from >>> Adacore. >> >> Are you building a cross compiler or a native compiler? >> If you are building a cross, you need to bootstrap a native compiler first. > > I'm not sure. The installed Gnat is x86_64-darwin; I want to build > aarch64-darwin.
you are building a cross then. > But in any case, how does that relate to the error messages I got? They > don't seem to have anything to do with missing compilers, but rather with the > use of language features too new for the available (downloadable) Gnat. Building a cross GNAT requires that the build compiler is from the same sources as the cross - so, as Andrew says, you need to bootstrap the current sources on x86_64 and then use that compiler to build the cross to aarch64. I’m not sure exactly where this constraint is mentioned .. but, nevertheless, it is a constraint. FWIW: I have not done this for a few weeks (using my arm64 prototype branch) but it was working fine then. Iain
