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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Working folders for a project
Date: Tue, 27 Sep 2022 08:27:30 +0200
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On 2022-09-27 04:50, Rick Duley wrote:
> It is my practice to load my software in the folder 'C:\' on my PC but to do my work in a separate disc partition 'D:\'.
> 
> I have created a new Project deploying it in D:\Ada Programming.  I specified the Project Name and Main Name as My_SDC.  My_SDC reads
> 
> project My_Sdc is
>      for Source_Dirs use ("Source Files");
>      for Object_Dir use "Object Files";
>      for Main use ("my_sdc.adb");
> end My_Sdc;
> 
> Project --> Build All is successful and placed the relevant files where I expect them to be.
> 
> Project --> Build and Run --> My_SDC.adb results in this error message:
> 
> [2022-09-27 10:45:00] Error while trying to execute D:\Ada Programming\obj\my_sdc.exe: not an executable
> 
> Something is looking for a folder called D:\Ada Programming\obj which does not exist.  How do I get it to look in the right place?

The binary directories are

    for Exec_Dir use ...;

and (for a library):

    for Library_Dir use ...;

There is no need to specify any (Object_Dir included) unless you build 
for different targets/scenarios, e.g. Debug/Release/Profile and need to 
sort them out.

E.g.

    for Object_Dir use
       "obj" & Target_OS & "/" & Target_Arch & "/" & Development_Type;

As other said, keep you project interoperable between Windows and Linux:

1. Always use small letters
2. Newer use spaces
3. Newer use \ as a directory separator. (GCC and GNAT run-times 
understand /).
4. Newer use Latin-1 or UTF-8 (not even in the string literals).

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