Re: Specifying a target in a GPRBuild project file?

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Fri, 26 Apr 2013 20:52:36 +0200, Pascal Obry wrote:

> Le 26/04/2013 20:32, Dmitry A. Kazakov a �crit :
>> I use a scenario variable Platform to select the compiler, binder, linker,
>> archiver, whatever needed. E.g. 
>> 
>>    case Platform is
>>        ...
>>        when "x86_vxworks" =>
>>           ...
>>           for Gnatlist use "... 586-wrs-vxworks-gnatls";
>>           ...
> 
> And here there is zero knowledge about the way the target support the
> tools, compiler specific options needed, response file support...

Yes, but that would not work anyway. I mean, in any case, I must set
specific options for each platform regardless whatever knowledge gprbuild
may possess.

>> I do this:
>> 
>>    gnatmake -Pfoo.gpr -XPlaform=x86_vxworks
>>  
>> Do I correctly understand that "target" requires a configuration project?
>> Because I use none.
> 
> Yes and no. I don't see why you are not using:
> 
>    $ x86-pc-vxworks-gnatmake -Pfoo.gpr

I use one gnatmake for all targets, which is an advantage when you have to
mount additional tool chain on top of it.
 
> which is somewhat equivalent to:
> 
>    $ gprbuild --target=x86-pc-vxworks foo.gpr

Which wonders me how gprbuild might know the target. It should search for
all installed cross compilers. Does it that? How? Which one gets selected?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de