From Jan Peciva, build fix

src/osgPlugins/Inventor/CMakeLists.txt

@@ -1,8 +1,5 @@
 INCLUDE(OsgMacroUtils)
 
-# Disable the build of a problem section in ConvertToInventor.cpp
-ADD_DEFINITIONS(-DDISABLE_PROBLEM_COMPILE_SECTIONS)
-
 SET(TARGET_SRC
     ConvertToInventor.cpp
     ConvertFromInventor.cpp
@@ -22,6 +19,8 @@ SET(TARGET_HDRS
 
 ADD_DEFINITIONS(-DCOIN_DLL)
 
-SET(TARGET_EXTERNAL_LIBRARIES ${INVENTOR_LIBRARY} )
+INCLUDE_DIRECTORIES(${INVENTOR_INCLUDE_DIR})
+
+SET(TARGET_LIBRARIES_VARS INVENTOR_LIBRARY)
 
 SETUP_PLUGIN(iv)