Add the OpenFOAM source tree

applications/test/foamVersion/Test-foamVersionString.C

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+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Application
+    foamVersionString.C
+
+Description
+    Print the OpenFOAM version strings.
+
+    Simultaneously the smallest possible program to use a minimal bit of
+    the OpenFOAM library
+
+\*---------------------------------------------------------------------------*/
+
+#include <iostream>
+#include "foamVersion.H"
+
+int main()
+{
+    std::cout
+        << "version " << Foam::FOAMversion << "\n"
+        << "build   " << Foam::FOAMbuild << "\n";
+
+    return 0;
+}
+
+// ************************************************************************* //