[Ada] Bootstrapping mainline GNAT fails (with workaround and root cause: makefile bug)

[Florian Weimer]

Andreas Schwab <schwab@suse.de> writes:

> |> That's why I didn't care about the breakage in the Ada run-time
> |> library when OBJDIR is a subdirectory of SRCDIR.
>
> If you apply my patch, it will work.

For the Ada front end.  What about other areas of the compiler?
The quoted portion of the manual predates the inclusion of GNAT.

(This does not mean I wouldn't approve your patch if I were one of the
maintainers, BTW.)