+SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--unresolved-symbols=ignore-all ${ext_syms}")
+
+IF (EXISTS "${CMAKE_SOURCE_DIR}/libext.a")
+ ADD_LIBRARY(ext STATIC IMPORTED)
+ SET_PROPERTY(TARGET ext PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libext.a)
+ LIST(APPEND ext_libs ext)
+ENDIF()
+
+IF (EXISTS "${CMAKE_SOURCE_DIR}/libext4.a")
+ ADD_LIBRARY(ext4 STATIC IMPORTED)
+ SET_PROPERTY(TARGET ext4 PROPERTY IMPORTED_LOCATION "${CMAKE_SOURCE_DIR}/libext4.a")
+ LIST(APPEND ext_libs ext4)
+ENDIF()