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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Starting learning ADA
Date: Sat, 08 Jun 2019 21:10:33 +0100
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joakimds@kth.se writes:

> When opening the normal command prompt in Windows 10 and one executes
> "gcc --version" it should say it is the GNAT Community 2019 version of
> the compiler. You could try that in the Ubuntu Subsystem and I predict
> is will say gcc is the FSF version.

The other check is "gnatls -v". On this macbook I get

====================
$ gnatls -v

GNATLS Community 2019 (20190517-83)
Copyright (C) 1997-2019, Free Software Foundation, Inc.

Source Search Path:
   <Current_Directory>
   /opt/gnat-ce-2019/lib/gcc/x86_64-apple-darwin17.7.0/8.3.1/rts-native/adainclude


Object Search Path:
   <Current_Directory>
   /opt/gnat-ce-2019/lib/gcc/x86_64-apple-darwin17.7.0/8.3.1/rts-native/adalib


Project Search Path:
   <Current_Directory>
   /opt/gnat-ce-2019/x86_64-apple-darwin17.7.0/lib/gnat
   /opt/gnat-ce-2019/x86_64-apple-darwin17.7.0/share/gpr
   /opt/gnat-ce-2019/share/gpr
   /opt/gnat-ce-2019/lib/gnat
====================

and I'd expect your Linux version to look very similar, except that the
prefix (/opt/gnat-ce-2019) and the machine triplet
(x86_64-apple-darwin17.7.0) will of course change for your environment.

Note that the last set (Project Search Path) includes $prefix/share/gpr
and $prefix/lib/gnat; gnatcoll.gpr is in the first. So you should *not*
need to mess with ADA_PROJECT_PATH.

I can speak to the Mac environment, make an educated guess about the
Linux environment, but not so much about Windows.