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From: Brian Drummond <brian@shapes.demon.co.uk>
Newsgroups: comp.lang.ada
Subject: Re: Specifying an `--RTS` option in a GPR file, for a runtime library
Date: Mon, 15 Apr 2013 08:19:32 +0000 (UTC)
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Date: 2013-04-15T08:19:32+00:00
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On Sun, 14 Apr 2013 22:07:58 +0200, Yannick Duchêne (Hibou57) wrote:

> Le Sun, 14 Apr 2013 21:54:20 +0200, Yannick Duchêne (Hibou57)
> <yannick_duchene@yahoo.fr> a écrit:

> It still starts with “warning: RTS for language ada is discarded (full
> path)” as before with the absolute path variant, but now `gprbuild` also
> returns this additional message: “raised TYPES.UNRECOVERABLE_ERROR :
> targparm.adb:177”.
> 
> This must be a file from the compiler source, as I could not find this
> in the runtime source files.

This error is "cannot find system.ads" - first make sure your RTS 
directory contains adainclude/system.ads, and then figure out why the --
RTS= option is ignored/wrong/broken.

As of a couple of revisions ago, some tools (FSF tree, gnatclean+?) were 
looking for system.ads in the wrong place (ignoring --RTS) but that 
didn't affect normal builds.

As a crosscheck, have you tried building with gnatmake and a direct 
command line (no gpr), which DOES honour the --RTS= option? This may 
yield some light on what's wrong.

- Brian