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From: ldries46 <bertus.dries@planet.nl>
Subject: Checking for OS in gnatstudio project file(.gpr)
Date: Thu, 18 Jun 2020 13:32:40 +0200
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I em in neede for a possibility to check within a .gpr file which 
operating system is runnung. Is there a way to do that? So I can use the 
same project file without changing  the .gpr file when compiling a 
program on different OS'ses.