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From: Brian Drummond <brian3@shapes.demon.co.uk>
Subject: Re: Test method 1. simple hello world graphical window.
Newsgroups: comp.lang.ada
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Date: 2014-10-15T09:39:04+00:00
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On Tue, 14 Oct 2014 15:10:25 +0000, Phil wrote:

> Test method 1. On the Rosetta code website, I used the simple hello
> world graphical window.
> 
> Does not compile!
> Screenshot of the error messages are linked in a PDF file on this link:
> https://dl.dropboxusercontent.com/u/479487/
> compile_rosetta_ADA_simple_window.pdf

Not sure about this one from within gps, but compiling from the command 
line you usually need to run gtkada-config to set up paths so that 
[gnatmake|gprbuild] can find the GTKAda files on your installation. 

For example : 
gnatmake your_main_program.adb $(gtkada-config)
or
gnatmake -P your_project.gpr $(gtkada-config)


In my installation at the time I took these notes, running gtkada-config 
at the command line gave:

gtkada-config
-aI/usr/share/ada/adainclude/gtkada -aO/usr/lib/x86_64-linux-gnu/ada/
adalib/gtkada -largs -L/usr/lib/x86_64-linux-gnu -lgtkada -L/usr/lib/
x86_64-linux-gnu -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -
lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -
lfreetype -lfontconfig -lgobject-2.0 -lglib-2.0

which should let the build find the sources in the right place.

Don't know how to set up gps the same way, but maybe somebody does...
- Brian