Problem building on osx

[geoHeil]

I have a problem building on osx:
clang: error: unsupported option '-fopenmp' which is related to http://stackoverflow.com/questions/36211018/clang-error-errorunsupported-option-fopenmp-on-mac-osx-el-capitan-buildin but cannot be fixed by setting

export CC=gcc-6
export CXX=g++
export MPICXX=mpicxx

what am I missing?

-- The C compiler identification is GNU 6.2.0
-- The CXX compiler identification is AppleClang 8.0.0.8000038
-- Checking whether C compiler has -isysroot
m-- Checking whether C compiler has -isysroot - yes
-- Checking whether C compiler supports OSX deployment target flag
-- Checking whether C compiler supports OSX deployment target flag - yes
-- Check for working C compiler: /usr/local/bin/gcc-6
a-- Check for working C compiler: /usr/local/bin/gcc-6 -- works
-- Detecting C compiler ABI info
ke-- Detecting C compiler ABI info - done
-- Detecting C compile features
 --- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/usr/bin/g++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/usr/bin/g++ -- works
-- Detecting CXX compiler ABI info
j-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found MPI_C: /usr/local/Cellar/open-mpi/2.0.1/lib/libmpi.dylib
-- Found MPI_CXX: /usr/local/Cellar/open-mpi/2.0.1/lib/libmpi.dylib
/usr/local/Cellar/open-mpi/2.0.1/lib/libmpi.dylib
/usr/local/Cellar/open-mpi/2.0.1/lib/libmpi.dylib
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/geoHeil/Dropbox/masterThesis/LightGBM/build
geoHeil:build geoHeil$ make -j
Scanning dependencies of target lightgbm
[  9%] Building CXX object src/CMakeFiles/lightgbm.dir/main.cpp.o
[  9%] Building CXX object src/CMakeFiles/lightgbm.dir/application/application.cpp.o
[ 13%] Building CXX object src/CMakeFiles/lightgbm.dir/io/dataset.cpp.o
[ 18%] Building CXX object src/CMakeFiles/lightgbm.dir/io/metadata.cpp.o
[ 22%] Building CXX object src/CMakeFiles/lightgbm.dir/boosting/gbdt.cpp.o
[ 27%] Building CXX object src/CMakeFiles/lightgbm.dir/io/config.cpp.o
[ 36%] Building CXX object src/CMakeFiles/lightgbm.dir/boosting/boosting.cpp.o
[ 36%] Building CXX object src/CMakeFiles/lightgbm.dir/io/parser.cpp.o
[ 40%] Building CXX object src/CMakeFiles/lightgbm.dir/io/bin.cpp.o
[ 45%] Building CXX object src/CMakeFiles/lightgbm.dir/io/tree.cpp.o
[ 50%] Building CXX object src/CMakeFiles/lightgbm.dir/metric/dcg_calculator.cpp.o
[ 54%] Building CXX object src/CMakeFiles/lightgbm.dir/metric/metric.cpp.o
clang: error: unsupported option '-fopenmp'
clang: error: unsupported option '-fopenmp'
clang: error: unsupported option '-fopenmp'
clang: error: unsupported option '-fopenmp'
clang: error: unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/io/parser.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [src/CMakeFiles/lightgbm.dir/io/metadata.cpp.o] Error 1
clang: error: unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/boosting/gbdt.cpp.o] Error 1
make[2]: *** [src/CMakeFiles/lightgbm.dir/io/config.cpp.o] Error 1
make[2]: *** [src/CMakeFiles/lightgbm.dir/io/dataset.cpp.o] Error 1
make[2]: *** [src/CMakeFiles/lightgbm.dir/io/bin.cpp.o] Error 1
clang: error: unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/io/tree.cpp.o] Error 1
clang: clang: error: unsupported option '-fopenmp'error:
unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/boosting/boosting.cpp.o] Error 1
make[2]: *** [src/CMakeFiles/lightgbm.dir/metric/dcg_calculator.cpp.o] Error 1
clang: error: unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/metric/metric.cpp.o] Error 1
clang: error: unsupported option '-fopenmp'
[ 59%] Building CXX object src/CMakeFiles/lightgbm.dir/objective/objective_function.cpp.o
make[2]: *** [src/CMakeFiles/lightgbm.dir/application/application.cpp.o] Error 1
clang: error: unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/main.cpp.o] Error 1
clang: error: unsupported option '-fopenmp'
make[2]: *** [src/CMakeFiles/lightgbm.dir/objective/objective_function.cpp.o] Error 1
make[1]: *** [src/CMakeFiles/lightgbm.dir/all] Error 2

[chivee]

hi @geoHeil , could you please refer to #3 and give it a try.

according to your log - The CXX compiler identification is AppleClang 8.0.0.8000038 you still using apple clang for compiling.

export CXX=g++-6 should work for your settings

[geoHeil]

thanks indeed that works. But now I get a different compile error:

std::_Hashtable<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::__detail::_Select1st, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >::_Hashtable<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const*>(std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const*, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const*, unsigned long, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&, std::__detail::_Mod_range_hashing const&, std::__detail::_Default_ranged_hash const&, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&, std::__detail::_Select1st const&, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) in application.cpp.o
      void std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_emplace_back_aux<char const*, unsigned long>(char const*&&, unsigned long&&) in application.cpp.o
      void std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_emplace_back_aux<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) in gbdt.cpp.o
      ...
  "___cxa_throw_bad_array_new_length", referenced from:
      LightGBM::Application::Predict()     in application.cpp.o
      LightGBM::Application::LoadData()     in application.cpp.o
      LightGBM::GBDT::Init(LightGBM::Dataset const*, LightGBM::ObjectiveFunction const*, std::vector<LightGBM::Metric const*, std::allocator<LightGBM::Metric const*> > const&, char const*) in gbdt.cpp.o
      LightGBM::GBDT::AddDataset(LightGBM::Dataset const*, std::vector<LightGBM::Metric const*, std::allocator<LightGBM::Metric const*> > const&) in gbdt.cpp.o
      LightGBM::BinMapper::BinMapper(LightGBM::BinMapper const&) in bin.cpp.o
      LightGBM::BinMapper::CopyFrom(char const*) in bin.cpp.o
      LightGBM::DenseBin<unsigned short>::DenseBin(int) in bin.cpp.o
      ...
  "___dynamic_cast", referenced from:
      LightGBM::Application::InitTrain()     in application.cpp.o
      LightGBM::GBDT::GBDT(LightGBM::BoostingConfig const*) in gbdt.cpp.o
      LightGBM::OverallConfig::CheckParamConflict()      in config.cpp.o
  "___gxx_personality_v0", referenced from:
      Dwarf Exception Unwind Info (__eh_frame) in main.cpp.o
      Dwarf Exception Unwind Info (__eh_frame) in application.cpp.o
      Dwarf Exception Unwind Info (__eh_frame) in boosting.cpp.o
      Dwarf Exception Unwind Info (__eh_frame) in gbdt.cpp.o
      Dwarf Exception Unwind Info (__eh_frame) in bin.cpp.o
      Dwarf Exception Unwind Info (__eh_frame) in config.cpp.o
      Dwarf Exception Unwind Info (__eh_frame) in dataset.cpp.o
      ...
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
make[2]: *** [../lightgbm] Error 1
make[1]: *** [src/CMakeFiles/lightgbm.dir/all] Error 2
make: *** [all] Error 2

[geoHeil]

Thanks for the link cmake -DCMAKE_CXX_COMPILER=g++-6 -DUSE_MPI=ON .. results in a working build.

[github-actions]

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