pythia decay/interaction use now configurable xml-path

corsika/modules/pythia8/ConfigurationDirectory.hpp

+/*
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
+ *
+ * This software is distributed under the terms of the GNU General Public
+ * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
+ * the license.
+ */
+
+#pragma once
+
+#include <string>
+
+/**
+ * \file Interaction.inl
+ **/
+
+///! Helper macros to convert definitions into strings
+#define CORSIKA_STRINGIFY(x) #x
+#define CORSIKA_TOSTRING(x) CORSIKA_STRINGIFY(x)
+
+/**
+ *
+ * Location of the pythia XML directory with crucial input and config data:
+ **/
+static std::string const CORSIKA_Pythia8_XML_DIR =
+    std::string(CORSIKA_Pythia8_PREFIX) // from cmake
+    + std::string("/share/Pythia8/xmldoc/");