From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,URI_NOVOWEL
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 border2.nntp.dca1.giganews.com!nntp.giganews.com!ottix-news.ottix.net!newsswitch.lcs.mit.edu!nntp.TheWorld.com!.POSTED!not-for-mail
From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: project file syntax
Date: Sat, 02 Aug 2014 09:16:12 -0400
Organization: The World Public Access UNIX, Brookline, MA
Message-ID: <wccmwbnyqub.fsf@shell01.TheWorld.com>
References: <bsunt9dmor9ooukhvetao4nqkji6dt67sl@4ax.com>
NNTP-Posting-Host: shell01.theworld.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: pcls7.std.com 1406985370 12721 192.74.137.71 (2 Aug 2014 13:16:10
 GMT)
X-Complaints-To: abuse@TheWorld.com
NNTP-Posting-Date: Sat, 2 Aug 2014 13:16:10 +0000 (UTC)
User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (irix)
Cancel-Lock: sha1:MbB6kzIPCXGcpt/JxlWU7lVLvFU=
Xref: number.nntp.dca.giganews.com comp.lang.ada:188101
Date: 2014-08-02T09:16:12-04:00
List-Id: <comp.lang.ada>

agent@drrob1.com writes:

> As an exercise for myself, I'm converting an rpn calculator I wrote in
> modula-2 to Ada.  I have already debugged several modules, such as
> tknrtnsa, timliba and environa.  Now I want to debug 2 modules,
> hpcalca and rpna.  I call this project file rpna.gpr
>
> project rpna is
>   for Source_Files use ("rpna.adb","hpcalca.ads","hpcala.adb");   for

I suggest using the default naming convention, and leaving out the "for
Source_Files...".  Then your project will contain all source files
whose names match *.ads and *.adb.

You don't want to edit your project file every time you add a new source
file (or rename or delete one).

> Source_Dirs use (".", "./**");
>   for Main use ("rpna");   
>
>   package Builder is
>     for Default_Switches ("Ada")
>         use ("-g");
>   end Builder;
>
>   package Compiler is
>     for Default_Switches ("Ada")
>        use ("-fstack-check",
>             "-gnatVa",
>             "-g",
>             "-gnato",
>             "-gnatf",
>             "-gnatwu",

Consider using -gnatwa or -gnatwae.

>             "-gnat2012");
>   end Compiler;
>
> end rpna;
>
>
> I get errors that the modules I previously wrote cannot be found. That
> is, tknrtnsa, timliba and environa cannot be found.

Right.  Your project contains exactly 3 source files, and if they say
"with tknrtnsa", it won't find tknrtnsa.ads.

>...If I have these
> re-compiled by putting them in the Source_Files list, that works.  But
> it strikes me as I am not understanding something about project files.
>
> How do I write a project file to not have to recompile packages that I
> know already work, and for which I have the .ali and .o files?

That happens automatically.  gprbuild will [re]compile just the files
that need to be [re]compiled.  If you already have .ali and .o files
from a previous run of gprbuild, and they are up to date, those will not
be recompiled.  You shouldn't be trying to tell it which files need to
be recompiled -- it figures that out based on timestamps and .ali files.

You don't need to run gcc directly; just use gprbuild.

- Bob