plugins: python renderer: Add fork request to python renderer library, so it wont destory the base application

include/gds-render/output-renderers/external-renderer-interfaces.h

@@ -55,6 +55,11 @@
  */
 #define FUNC_DECL(FUNC) FUNC
 
+/**
+ * @brief Define for declaring exported variables
+ */
+#define VAR_DECL(VAR) VAR
+
 /** @} */
 
 #endif /* __EXTERNAL_RENDERER_INTERFACES_H__ */

plugins/python-renderer/src/force-fork.c

@@ -0,0 +1,34 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter 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 GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file python-renderer/force-fork.c
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup python-plugin
+ * @{
+ */
+
+#include <gds-render/output-renderers/external-renderer-interfaces.h>
+
+const int VAR_DECL(EXTERNAL_LIBRARY_FORK_REQUEST) = 0;
+
+/** @} */