[ada, build] host/target configuration

[Eric Botcazou]

> So, your case works because the manu/osys parsing wrongly detects/assigns
> a manufacturer »linux« and an operating system androideabi.  Then, the
> following case fails, which is expected to yield identical results, with
> "complete triplets" -- which I took for granted in my reasoning about the
> Makefile code:
> 
>     $ make target_alias=arm-unknown-linux-androideabi
>     target_alias = »arm-unknown-linux-androideabi«
>     targ = »arm unknown linux androideabi«
>     arch = »arm«
>     manu = »unknown«
>     osys = »linux«
>     not matched
> 
> 
> My suggested change would make all these work -- however I have not yet
> had the time to fully digest your other emails with the reasoning that
> you need configure GCC with non-canonical target and target_alias set
> differently.

The whole discussion started from wrong premises since, contrary to what the 
ChangeLog says, neither Pascal nor I have nothing to do with the original, 
problematic change (see PR ada/57188 for my take on it).  We all agree that 
the mess should be fixed somehow or other and Olivier is working on it.

-- 
Eric Botcazou