Re: Checking for OS in gnatstudio project file(.gpr)

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

On 18/06/2020 13:32, ldries46 wrote:
> I em in neede for a possibility to check within a .gpr file which 
> operating system is runnung. Is there a way to do that? So I can use the 
> same project file without changing  the .gpr file when compiling a 
> program on different OS'ses.

Well, it is a sad story.

Actually there is Project'Target which should give you Linux-esque 
triplet containing architecture and OS. [Isn't it obvious that you need 
three fields for two things?]

Unfortunately it does not work. Sometimes (most of the times?) it is empty.

And even if it worked GRP has no means to split a triplet into parts 
because it has no string indexing. So you will end up with a long case like:

    Target_Triplet := Project'Target;

    case Target_Triplet is
       when "aarch64-linux-gnu" =>
       when "arm-linux" =>
       when "arm-linux-gnueabi" =>
       when "arm-linux-gnueabihf" =>
       when "x86_64-apple-darwin" =>
       when "x86_64-freebsd" =>

and so on.

So you will be better on with a scenario variable.

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