Mac OSX 10.15.5 Catalina Undefined symbols for architecture x86_64

[wbrennan899]

Undefined symbols for architecture x86_64
OSX 10.15.5 Catalina

Using the Cmake instructions here. Tried on the master branch as well as 9b41a4e
https://openvslam.readthedocs.io/en/master/installation.html

Also replaced all instances of # with </usr/local/opt/libomp/include/omp.h> in order to get to this step.

I found a few past issues, but was unable to follow the solution proposed here #210 (comment)

cmake \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_INSTALL_PREFIX=/usr/local \
    -DCMAKE_CXX_FLAGS=-std=c++11 \
    -DBUILD_SHARED_LIBS=ON \
    -DBUILD_UNITTESTS=OFF \
    -DBUILD_WITH_MARCH_NATIVE=ON \
    -DG2O_USE_CHOLMOD=OFF \
    -DG2O_USE_CSPARSE=ON \
    -DG2O_USE_OPENGL=OFF \
    -DG2O_USE_OPENMP=ON \
    ..

[  3%] Built target parser_library
[  5%] Built target csparse_extension
[ 10%] Built target stuff
[ 11%] Built target interface_library
[ 11%] Linking CXX shared library ../../../lib/libg2o_core.dylib
Undefined symbols for architecture x86_64:
  "___kmpc_end_serialized_parallel", referenced from:
      g2o::SparseBlockMatrix<Eigen::Matrix<double, -1, -1, 0, -1, -1> >::~SparseBlockMatrix() in marginal_covariance_cholesky.cpp.o
      g2o::SparseOptimizer::computeActiveErrors() in sparse_optimizer.cpp.o
  "___kmpc_for_static_fini", referenced from:
      _.omp_outlined. in marginal_covariance_cholesky.cpp.o
      _.omp_outlined. in sparse_optimizer.cpp.o
  "___kmpc_for_static_init_4", referenced from:
      _.omp_outlined. in marginal_covariance_cholesky.cpp.o
      _.omp_outlined. in sparse_optimizer.cpp.o
  "___kmpc_fork_call", referenced from:
      g2o::SparseBlockMatrix<Eigen::Matrix<double, -1, -1, 0, -1, -1> >::~SparseBlockMatrix() in marginal_covariance_cholesky.cpp.o
      g2o::SparseOptimizer::computeActiveErrors() in sparse_optimizer.cpp.o
  "___kmpc_global_thread_num", referenced from:
      g2o::SparseBlockMatrix<Eigen::Matrix<double, -1, -1, 0, -1, -1> >::~SparseBlockMatrix() in marginal_covariance_cholesky.cpp.o
      _.omp_outlined. in marginal_covariance_cholesky.cpp.o
      g2o::SparseOptimizer::computeActiveErrors() in sparse_optimizer.cpp.o
      _.omp_outlined. in sparse_optimizer.cpp.o
  "___kmpc_serialized_parallel", referenced from:
      g2o::SparseBlockMatrix<Eigen::Matrix<double, -1, -1, 0, -1, -1> >::~SparseBlockMatrix() in marginal_covariance_cholesky.cpp.o
      g2o::SparseOptimizer::computeActiveErrors() in sparse_optimizer.cpp.o
  "_omp_destroy_lock", referenced from:
      g2o::OptimizableGraph::Vertex::~Vertex() in optimizable_graph.cpp.o
  "_omp_init_lock", referenced from:
      g2o::OptimizableGraph::Vertex::Vertex() in optimizable_graph.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [../lib/libg2o_core.dylib] Error 1
make[1]: *** [g2o/core/CMakeFiles/core.dir/all] Error 2
make: *** [all] Error 2

[Camuvingian]

@wbrennan899 did you manage to fix this issue, I am having exactly the same problem...

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