python: cannot import name frontend

[engahmed1190]

i have seen that this error reported before but none of the suggested solution solved my case
my machine is Ubuntu 16.04 doesn't have cuda , fresh installed

i have installed thrift successfully including wangle , the error i have is related to frontend module

+ cd /tmp/fblualib-build.FSDy82/thpp/thpp
+ '[' 1 -eq 0 ']'
+ ./build.sh
If you don't have folly or thrift installed, try doing
  THPP_NOFB=1 ./build.sh
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-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Torch7 in /home/osama/torch/install
-- Found Folly: /usr/local/include  
-- Found Thrift: /usr/local/include  
-- Performing Test HAS_NO_AS_NEEDED
-- Performing Test HAS_NO_AS_NEEDED - Success
-- Found Glog: /usr/include  
-- Found PythonInterp: /usr/bin/python (found version "2.7.12") 
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/fblualib-build.FSDy82/thpp/thpp/build
[  5%] Generating thpp/if/gen-cpp2/Tensor_data.h, thpp/if/gen-cpp2/Tensor_types.h, thpp/if/gen-cpp2/Tensor_types.tcc, thpp/if/gen-cpp2/Tensor_constants.h, thpp/if/gen-cpp2/Tensor_data.cpp, thpp/if/gen-cpp2/Tensor_types.cpp, thpp/if/gen-cpp2/Tensor_constants.cpp
/usr/bin/python: cannot import name frontend
CMakeFiles/thpp.dir/build.make:61: recipe for target 'thpp/if/gen-cpp2/Tensor_data.h' failed
make[2]: *** [thpp/if/gen-cpp2/Tensor_data.h] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/thpp.dir/all' failed
make[1]: *** [CMakeFiles/thpp.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

what i have done till now

1 -

 cd fbthrift/thrift/compiler/py/
 sudo python setup.py install

2- try to compile the using

g++ -I /usr/include/python2.7 -I fbthrift -std=c++14 -fpic -shared -o frontend.so compiler.cc -lboost_python -lpython2.7 -L/build/lib -lcompiler_base -lcompiler_ast -lboost_system -lboost_filesystem -lssl -lcrypto
could it not find frontend.so also i have an error related to relocation R_X86_64_32 against although i have added

set(CMAKE_CXX_FLAGS "-fPIC")
set(CMAKE_C_FLAGS "-fPIC")"

in the CMakeLists.txt under fbthrift/thrift/compiler still the same error

how i can move forward in this case

[gbolin]

mark, same error.
in thrift/compiler/py/setup.py,
def run_setup(): if sys.argv[1] == 'build': shutil.copy('.libs/frontend.so', 'frontend.so')
where does the .libs come from , administrator?

[rockindy]

This is my way to solve this issue:

1. use fbthrift/build$ cmake -DCMAKE_CXX_FLAGS=-fPIC .. to make the project
2. use this command to compile frontend.so:
   fbthrift$ g++ -I . -I /usr/include/python2.7 -std=c++14 -fPIC -shared -o frontend.so thrift/compiler/py/compiler.cc -L_build/lib -Wl,--start-group -lboost_python -lpython2.7 -lcompiler_base -lcompiler_ast -lboost_system -lboost_filesystem -lssl -lcrypto -Wl,--end-group

[zhangchurong]

I followed the instructions mentioned above, and copy frontend.so to the thrift_compiler folder,but now I encounter this problem:
[ 5%] Generating thpp/if/gen-cpp2/Tensor_data.h, thpp/if/gen-cpp2/Tensor_types.h, thpp/if/gen-cpp2/Tensor_types.tcc, thpp/if/gen-cpp2/Tensor_constants.h, thpp/if/gen-cpp2/Tensor_data.cpp, thpp/if/gen-cpp2/Tensor_types.cpp, thpp/if/gen-cpp2/Tensor_constants.cpp /usr/bin/python: /usr/local/lib/python2.7/dist-packages/thrift_py-0.9.0-py2.7.egg/thrift_compiler/frontend.so: undefined symbol: _ZN5boost6system6detail25generic_category_instanceE CMakeFiles/thpp.dir/build.make:61: recipe for target 'thpp/if/gen-cpp2/Tensor_data.h' failed
can anyone help me out? thanks a lot!

[vitaut]

Duplicate of #249.