Error occurs when building apis or documentation

[weixing02]

when i try to build documentations or apis, error occurs:

λ 5dcd4c70ce9f /paddle/build {develop} make paddle_v2_docs
[  1%] Built target extern_gflags
[  1%] Built target extern_glog
[  1%] Built target header
[  3%] Built target extern_zlib
[  3%] Built target extern_snappy
[  4%] Built target extern_snappystream
[  4%] Built target chunk
[  4%] Built target scanner
[  6%] Built target writer
[  7%] Built target recordio
[  9%] Built target extern_openblas
[  9%] Built target cblas
[  9%] Built target extern_protobuf
[ 10%] Built target extern_threadpool
[ 10%] Built target extern_eigen3
[ 12%] Built target extern_boost
[ 13%] Built target extern_pybind
[ 13%] Built target enforce
[ 13%] Built target cpu_info
[ 13%] Built target system_allocator
[ 13%] Built target memory_block
[ 13%] Built target buddy_allocator
[ 13%] Built target place
[ 13%] Built target malloc
[ 13%] Built target memcpy
[ 15%] Built target memory
[ 15%] Built target device_context
[ 16%] Built target profiler_proto
[ 16%] Building CXX object paddle/fluid/platform/CMakeFiles/device_tracer.dir/device_tracer.cc.o
In file included from /paddle/paddle/fluid/framework/op_desc.h:19:0,
                 from /paddle/paddle/fluid/framework/block_desc.h:24,
                 from /paddle/paddle/fluid/platform/device_tracer.cc:23:
/paddle/paddle/fluid/framework/attribute.h:23:49: fatal error: paddle/fluid/framework/framework.pb.h: No such file or directory
compilation terminated.
paddle/fluid/platform/CMakeFiles/device_tracer.dir/build.make:62: recipe for target 'paddle/fluid/platform/CMakeFiles/device_tracer.dir/device_tracer.cc.o' failed
make[3]: *** [paddle/fluid/platform/CMakeFiles/device_tracer.dir/device_tracer.cc.o] Error 1
CMakeFiles/Makefile2:2749: recipe for target 'paddle/fluid/platform/CMakeFiles/device_tracer.dir/all' failed
make[2]: *** [paddle/fluid/platform/CMakeFiles/device_tracer.dir/all] Error 2
CMakeFiles/Makefile2:22167: recipe for target 'doc/v2/CMakeFiles/paddle_v2_docs.dir/rule' failed
make[1]: *** [doc/v2/CMakeFiles/paddle_v2_docs.dir/rule] Error 2
Makefile:4149: recipe for target 'paddle_v2_docs' failed
make: *** [paddle_v2_docs] Error 2