Fixes to build on openSUSE/Packman. (#67)

- Support different BINDIR, INCLUDEDIR and LIBDIR on install
- Take right python dir on x86_64 arch
- Fix build against Boost >= 1.58
- Make it possible to build libIfcGeom shared to reduce size of dependent binaries
- Fix INSTALL_RPATH
- Fix some more compiler warnings

src/ifcwrap/CMakeLists.txt

@@ -52,14 +52,15 @@ ENDIF()
 
 SET_SOURCE_FILES_PROPERTIES(IfcPython.i PROPERTIES CPLUSPLUS ON)
 SWIG_ADD_MODULE(ifcopenshell_wrapper python IfcPython.i)
-SWIG_LINK_LIBRARIES(ifcopenshell_wrapper IfcParse IfcGeom ${PYTHON_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${ICU_LIBRARIES})
+SWIG_LINK_LIBRARIES(ifcopenshell_wrapper ${IFCLIBS} ${PYTHON_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${ICU_LIBRARIES})
+SET_INSTALL_RPATHS(${SWIG_MODULE_ifcopenshell_wrapper_REAL_NAME} "${IFCDIRS};${OCC_LIBRARY_DIR};${ICU_LIBRARY_DIR}")
 
 # Try to find the Python interpreter to get the site-packages
 # directory in which the wrapper can be installed.
 FIND_PACKAGE(PythonInterp)
 IF(PYTHONINTERP_FOUND)
     EXECUTE_PROCESS(
-        COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib())"
+        COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib(1))"
         OUTPUT_VARIABLE python_package_dir
     )
 

src/ifcwrap/IfcGeomWrapper.i

@@ -387,6 +387,7 @@ struct ShapeRTTI : public boost::static_visitor<PyObject*>
 				throw IfcParse::IfcException("Invalid additional representation specified");
 			}
 		}
+		return boost::variant<IfcGeom::Element<double>*, IfcGeom::Representation::Representation*>();
 	}
 %}