CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_bagging_cpu" links to target "OpenMP::OpenMP_CXX" but the
  target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:13 (add_executable)

CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_rbm_cpu" links to target "OpenMP::OpenMP_CXX" but the
  target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:45 (add_executable)

CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_perceptron_cpu" links to target "OpenMP::OpenMP_CXX" but
  the target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:41 (add_executable)

CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_neural_network_cpu" links to target "OpenMP::OpenMP_CXX"
  but the target was not found.  Perhaps a find_package() call is missing for
  an IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:37 (add_executable)

CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_logistic_regression_cpu" links to target
  "OpenMP::OpenMP_CXX" but the target was not found.  Perhaps a
  find_package() call is missing for an IMPORTED target, or an ALIAS target
  is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:29 (add_executable)


CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_kmeans_cpu" links to target "OpenMP::OpenMP_CXX" but the
  target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:25 (add_executable)


CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_naive_bayes_cpu" links to target "OpenMP::OpenMP_CXX" but
  the target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:33 (add_executable)


CMake Error at CMakeLists.txt:42 (_add_executable):
  Target "example_deep_belief_net_cpu" links to target "OpenMP::OpenMP_CXX"
  but the target was not found.  Perhaps a find_package() call is missing for
  an IMPORTED target, or an ALIAS target is missing?
Call Stack (most recent call first):
  machine_learning/CMakeLists.txt:17 (add_executable)