Work around https://github.com/swig/swig/issues/325

src/ifcwrap/CMakeLists.txt

@@ -41,6 +41,12 @@ INCLUDE_DIRECTORIES(${PYTHON_INCLUDE_PATH})
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
 
 SET(CMAKE_SWIG_FLAGS "")
+# NOTE Workaround for most likely missing debug Python libraries on Windows (requires Python built from the source).
+# Python 3.5 intaller and onwards will have an option to install the debug libraries too.
+IF (WIN32 AND NOT PYTHON_DEBUG_LIBRARIES)
+	MESSAGE(STATUS "PYTHON_DEBUG_LIBRARIES not found, defining SWIG_PYTHON_INTERPRETER_NO_DEBUG workaround for IfcWrap.")
+	ADD_DEFINITIONS(-DSWIG_PYTHON_INTERPRETER_NO_DEBUG)
+ENDIF()
 
 SET_SOURCE_FILES_PROPERTIES(IfcPython.i PROPERTIES CPLUSPLUS ON)
 SWIG_ADD_MODULE(ifcopenshell_wrapper python IfcPython.i)

src/ifcwrap/IfcPython.i

@@ -17,6 +17,27 @@
  *                                                                              *
  ********************************************************************************/
 
+%begin %{
+#if defined(_DEBUG) && defined(SWIG_PYTHON_INTERPRETER_NO_DEBUG)
+/* https://github.com/swig/swig/issues/325 */
+# include <basetsd.h>
+# include <assert.h>
+# include <ctype.h>
+# include <errno.h>
+# include <io.h>
+# include <math.h>
+# include <sal.h>
+# include <stdarg.h>
+# include <stddef.h>
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+# include <sys/stat.h>
+# include <time.h>
+# include <wchar.h>
+#endif
+%}
+
 %include "std_string.i"
 %include "exception.i"