diff -Naur osl/src/external_osl/src/cmake/flexbison.cmake osl_bak/src/external_osl/src/cmake/flexbison.cmake
--- osl/src/external_osl//src/cmake/flexbison.cmake	2016-01-29 11:15:22 -0700
+++ osl_bak/src/external_osl/src/cmake/flexbison.cmake	2016-02-29 21:26:26 -0700
@@ -77,7 +77,7 @@
           DEPENDS ${${compiler_headers}}
           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} )
         ADD_CUSTOM_COMMAND ( OUTPUT ${flexoutputcxx} 
-          COMMAND ${FLEX_EXECUTABLE} -o ${flexoutputcxx} "${CMAKE_CURRENT_SOURCE_DIR}/${flexsrc}"
+          COMMAND ${FLEX_EXECUTABLE} ${FLEX_EXTRA_OPTIONS} -o ${flexoutputcxx} "${CMAKE_CURRENT_SOURCE_DIR}/${flexsrc}"
           MAIN_DEPENDENCY ${flexsrc}
           DEPENDS ${${compiler_headers}}
           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} )