[Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32

[timo.teras at iki dot fi]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80117

--- Comment #25 from Timo Teräs <timo.teras at iki dot fi> ---
(In reply to Andrew Pinski from comment #24)
> >This works everywhere else, so I wonder if we could have the ada makefile check the abi somehow more reliably than pathname?
> 
> Your patch is broken anyways because it makes your OS very incompatible with
> most others.  Note I think this is a YOCTO which I know very much is wrong
> in doing that.  YOCTO is not friendly to multi-libing with aarch32 and
> aarch64 and ilp32.  Cavium had to hack the YOCTO patches to get rid of that
> brokenness.

We have musl c-library so binary compatibility is limited anyways. We do ship
/lib64 -> /lib symlink in compatibility packages, though. My concern is that
there are valid reasons to change that path. Could it be tested against
MULTILIB_OSDIRNAMES or have alternate test that is not based on the path?