Re: architecture-independent GNAT project files?

[sjw <simon.j.wright@mac.com>]

On Apr 27, 1:06 pm, a...@anon.org (anon) wrote:
> You could use: -gnateD on your command line or GPS options list
>
>   -gnateD?  Define or redefine preprocessing symbol, e.g. -gnateDsym=val
>
> Where use could set a variable to the architecture path you wish to use
> such as for a 32-bit arch
>
> gnat make  -gnateDArchLib="/usr/lib/'  <filename>
>
>      then for the 64 bit arch use
>
> gnat make   -gnateDArchLib="/usr/lib64/'   <filename>
>
> --
> --  ArchLib is define in commnd line options. if not present an error
> --  will be generated.
> --
>    Libs_Path : String := ArchLib ;
>
>    ...
>
>    open ( File => LibFlile,
>           Name => Libs_Path & FileName,
>           Mode => In_File ) ;

This sounds very like the -X flag. I wonder why there are 2 ways of
doing the same thing?

Oh, -gnatD is a preprocessor flag, sounds like it's for a different
purpose? (gnatprep).

Personally I use -Xsym=val in Makefiles.