Am Mi., 18. Nov. 2020 um 23:54 Uhr schrieb Julius Werner < jwerner@chromium.org>:
because unlike everything else you need to build coreboot there seems to be no way to get an ADA toolchain from crossgcc.
gnat (gcc's Ada implementation) needs an Ada implementation to bootstrap (just like gcc needs a C++ compiler). If you have gnat[0] installed on the host, you also get a gnat for the targets. (side note: The chromium-os coreboot-sdk package uses a binary toolchain from AdaCore for the bootstrap, so within cros_sdk the cross compilers are all Ada-aware.)
But yes, it's not exactly obvious.
Patrick [0] conditions apply: it needs to be the same build as gcc so that they can interact (some distros mess this up) and it must be sufficiently new (although we integrated a bunch of hacks to support older compilers than usual)