diff -r f94f57855939 -r 46151cd23815 src/relpipe-lib-common.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/relpipe-lib-common.cpp	Sun Nov 17 12:14:18 2019 +0100
@@ -0,0 +1,27 @@
+/**
+ * Relational pipes (library)
+ * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the:
+ *  - GNU Lesser General Public License as published by the Free Software Foundation;
+ *    version 3 of the License or (at your option)
+ *  - GNU General Public License as published by the Free Software Foundation;
+ *    version 2 of the License.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * The relpipe-lib-protocol.cpp is a header-only C++ library.
+ * Generated .so file is quite useless and it is not needed to compile this library.
+ * Compilation just validates that the .h file has no severe bugs.
+ * In future, the binary might contain some code for testing purposes.
+ */
+#include "../include/relpipe/protocol/constants.h"
\ No newline at end of file