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From: "Nasser M. Abbasi" <nma@12000.org>
Newsgroups: comp.lang.ada
Subject: Re: how to tell gnatmake to send executables to a different directory
 when compiling multi source?
Date: Sun, 29 Jul 2012 07:31:08 -0500
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Date: 2012-07-29T07:31:08-05:00
List-Id: <comp.lang.ada>

I found why I can't tell gnatmake to use different folder
for object and executable at the same time.

It is all gnatbind fault ;)

Here is a picture of how gnatmake works, found after many trials.
I put the step number in (N) below, which represent the
order of build step.

                  main.adb
                     |
                     V
             (1)  gnatmake -c
                     |
                     V
              main.o, main.ali  ---------+
                         |               |
                         V               |
                 (2) gnatbind -x         |
                         |               |
                         V               |
                       b~main.ads        |
                       b~main.adb        |
                         |               |
                         V               V
                         +-----+---------+
                               |
                               V
                      (3) gnatlink main.ali -L/usr/lib -lblas -llapack
                               |
                               V
                            main.exe

the problem is that gnatbind has no option to send the b~* files
to somewhere other than the folder it is in. i.e. the main.ali
and the b~* files need to be in the same folder.

Hence, it I send the main.ali to another folder from where the
source file is after step (1), then gnatbind will fail in
step(2).  There is NO option to tell gnatbind to send the b~*
files to another folder.

And gnatlink in step(3) wants main.ali and the b~files to be
in the same folder.

big mess.  So brute force build everything was the the easy way
out for me for now (until and if I have time time to learn gpr :)

--Nasser