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Split dev-lang/gnat-gpl into dev-lang/ada-bootstrap. This ebuild
was initially a clone of dev-lang/gnat-gpl-2021-r5 then had some
cleanups done, toolchain.eclass use removed, and simplified what it
configures/builds/installs.
As I mentioned in 799693623d76c89e8b04d2434d0dfece44bb49f9, there were
two jobs left -- this fixes the first one: splitting dev-lang/gnat-gpl
into its own package which doesn't collide with sys-devel/gcc:10 and
also does the least possible work, not with lots of USE, etc.)
Some inspiration taken from sys-devel/bpf-toolchain. Considered
using the *-toolchain name again but given the purpose of this is *not*
just to avoid crossdev use but instead to bootstrap from a binary for Ada,
it didn't feel appropriate.
(Planned to do this anyway but the issue mentioned in
9732ef3475830dbe289fc80358613e90b612563c pushed me to get on with it now.)
Later versions of ada-bootstrap will be our own binaries for both
newer GCC as a base (although this is mostly a nice-to-have and to keep
things building rather than it being essential, AFAIK) as well as more
importantly musl and other arch support.
For that future work, see https://bugs.gentoo.org/940471#c1 for a
suggestion from Luke A. Guest. That will be tracked in bug #940472.
Bug: https://bugs.gentoo.org/547358
Bug: https://bugs.gentoo.org/919667
Bug: https://bugs.gentoo.org/940472
Closes: https://bugs.gentoo.org/940471
Signed-off-by: Sam James <sam@gentoo.org>
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