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From: =?ISO-8859-1?Q?Bj=F6rn?= Persson <bjorn@xn--rombobjrn-67a.se>
Newsgroups: comp.lang.ada
Subject: architecture-independent GNAT project files?
Date: Mon, 27 Apr 2009 09:32:29 +0200
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Date: 2009-04-27T09:32:29+02:00
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When I write GNAT project files for shared libraries I find that I have to
hardcode the paths to some architecture-specific directories. 32-bit
libraries are in /usr/lib/ while 64-bit libraries are in /usr/lib64/, and I
would like to have a single project file that works for both cases.

The way to find out the architecture of a Unix-like system appears to be to
invoke uname, but GNAT project files don't seem to have a shell-out
feature. As far as I can see in the manual the only ways they can get input
is by environment variables and command line parameters. I don't suppose
Gnatmake provides some variable to project files that shows what the
architecture is?

I could define an environment variable in the systemwide profile, but that's
not really a good solution. That variable would contain the host
architecture but it's the target architecture I really need to test for. I
also don't like polluting the environment.

Does anyone have a better idea?

-- 
Bj�rn Persson
PGP key A88682FD