Запуск pip install horovod
в среде conda с установленным pytorch привел к
error: None of TensorFlow, PyTorch, or MXNet plugins were built. See errors above.
, где корневая проблема в верхней части стандартного вывода:
ld: library not found for -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)
INFO: Unable to build PyTorch plugin, will skip it.