find_path(VPP_INCLUDE_DIR PATH_SUFFIXES NAMES vppinfra/clib.h)
find_program(VPP_APIGEN vppapigen)
+find_program(VPP_VAPI_C_GEN vapi_c_gen.py)
+find_program(VPP_VAPI_CPP_GEN vapi_cpp_gen.py)
if(VPP_INCLUDE_DIR AND VPP_APIGEN)
include_directories (${VPP_INCLUDE_DIR})