解决jetson nano安装onnx错误(ERROR: Failed building wheel for onnx)总结

解决依赖问题

没有安装protobuf

错误信息参考贴：https://github.com/onnx/onnx/issues/2481
解决办法：pip3 install protobuf

Protobuf compiler not found

错误信息：

ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/setup.py'"'"'; __file__='"'"'/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-jy6zy5qw
       cwd: /tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/
  Complete output (68 lines):
  fatal: 不是一个 git 仓库（或者任何父目录）：.git
  /home/yaoz/.local/lib/python3.6/site-packages/setuptools/dist.py:645: UserWarning: Usage of dash-separated 'license-file' will not be supported in future versions. Please use the underscore name 'license_file' instead
    % (opt, underscore_opt))
  /home/yaoz/.local/lib/python3.6/site-packages/setuptools/dist.py:645: UserWarning: Usage of dash-separated 'license-file' will not be supported in future versions. Please use the underscore name 'license_file' instead
    % (opt, underscore_opt))
  running bdist_wheel
  running build
  running build_py
  running create_version
  running cmake_build
  -- The C compiler identification is GNU 7.5.0
  -- The CXX compiler identification is GNU 7.5.0
  -- 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
  Generated: /tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/.setuptools-cmake-build/onnx/onnx-ml.proto
  CMake Error at CMakeLists.txt:248 (message):
    Protobuf compiler not found
  Call Stack (most recent call first):
    CMakeLists.txt:279 (relative_protobuf_generate_cpp)
  
  
  -- Configuring incomplete, errors occurred!
  See also "/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/.setuptools-cmake-build/CMakeFiles/CMakeOutput.log".
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/setup.py", line 334, in <module>
      'backend-test-tools = onnx.backend.test.cmd_tools:main',
    File "/home/yaoz/.local/lib/python3.6/site-packages/setuptools/__init__.py", line 153, in setup
      return distutils.core.setup(**attrs)
    File "/usr/lib/python3.6/distutils/core.py", line 148, in setup
      dist.run_commands()
    File "/usr/lib/python3.6/distutils/dist.py", line 955, in run_commands
      self.run_command(cmd)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "/usr/lib/python3/dist-packages/wheel/bdist_wheel.py", line 204, in run
      self.run_command('build')
    File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "/usr/lib/python3.6/distutils/command/build.py", line 135, in run
      self.run_command(cmd_name)
    File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/setup.py", line 209, in run
      self.run_command('cmake_build')
    File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af/setup.py", line 195, in run
      subprocess.check_call(cmake_args)
    File "/usr/lib/python3.6/subprocess.py", line 311, in check_call
      raise CalledProcessError(retcode, cmd)
  subprocess.CalledProcessError: Command '['/usr/bin/cmake', '-DPYTHON_INCLUDE_DIR=/usr/include/python3.6m', '-DPYTHON_EXECUTABLE=/usr/bin/python3', '-DBUILD_ONNX_PYTHON=ON', '-DCMAKE_EXPORT_COMPILE_COMMANDS=ON', '-DONNX_NAMESPACE=onnx', '-DPY_EXT_SUFFIX=.cpython-36m-aarch64-linux-gnu.so', '-DCMAKE_BUILD_TYPE=Release', '-DONNX_ML=1', '/tmp/pip-install-38btlr9d/onnx_c5170763f41345449ba410a0157122af']' returned non-zero exit status 1.
  ----------------------------------------
  ERROR: Failed building wheel for onnx

问题原因：缺少Protobuf compiler
解决办法（安装好其它依赖）：

sudo apt-get install -y libprotobuf-dev protobuf-compiler python3-scipy

注：要安装scipy建议安装1.4.1版本，建议参考我上一个帖：jetson nano安装tensorflow踩坑记录(scipy1.4.1)

fatal error: Python.h: 没有那个文件或目录

具体报错如下：

ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 /home/yaoz/.local/lib/python3.6/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmpm_ittf0y
       cwd: /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7
  Complete output (247 lines):
  fatal: 不是一个 git 仓库（或者任何父目录）：.git
  running bdist_wheel
  running build
  running build_py
  running create_version
  running cmake_build
  -- The C compiler identification is GNU 7.5.0
  -- The CXX compiler identification is GNU 7.5.0
  -- 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 PythonInterp: /usr/bin/python3 (found version "3.6.9")
  -- Found PythonLibs: /usr/lib/aarch64-linux-gnu/libpython2.7.so
  -- 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
  -- Found Protobuf: /usr/lib/aarch64-linux-gnu/libprotobuf.so;-lpthread (found version "3.0.0")
  Generated: /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-ml.proto
  Generated: /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-operators-ml.proto
  Generated: /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-data.proto
  CMake Warning at CMakeLists.txt:416 (find_package):
    By not providing "Findpybind11.cmake" in CMAKE_MODULE_PATH this project has
    asked CMake to find a package configuration file provided by "pybind11",
    but CMake did not find one.
  
    Could not find a package configuration file provided by "pybind11"
    (requested version 2.2) with any of the following names:
  
      pybind11Config.cmake
      pybind11-config.cmake
  
    Add the installation prefix of "pybind11" to CMAKE_PREFIX_PATH or set
    "pybind11_DIR" to a directory containing one of the above files.  If
    "pybind11" provides a separate development package or SDK, be sure it has
    been installed.
  
  
  --
  -- ******** Summary ********
  --   CMake version         : 3.10.2
  --   CMake command         : /usr/bin/cmake
  --   System                : Linux
  --   C++ compiler          : /usr/bin/c++
  --   C++ compiler version  : 7.5.0
  --   CXX flags             :  -Wnon-virtual-dtor
  --   Build type            : Release
  --   Compile definitions   :
  --   CMAKE_PREFIX_PATH     :
  --   CMAKE_INSTALL_PREFIX  : /usr/local
  --   CMAKE_MODULE_PATH     :
  --
  --   ONNX version          : 1.8.1
  --   ONNX NAMESPACE        : onnx
  --   ONNX_BUILD_TESTS      : OFF
  --   ONNX_BUILD_BENCHMARKS : OFF
  --   ONNX_USE_LITE_PROTO   : OFF
  --   ONNXIFI_DUMMY_BACKEND : OFF
  --   ONNXIFI_ENABLE_EXT    : OFF
  --
  --   Protobuf compiler     : /usr/bin/protoc
  --   Protobuf includes     : /usr/include
  --   Protobuf libraries    : /usr/lib/aarch64-linux-gnu/libprotobuf.so;-lpthread
  --   BUILD_ONNX_PYTHON     : ON
  --     Python version      :
  --     Python executable   : /usr/bin/python3
  --     Python includes     : /usr/include/python3.6m
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build
  Scanning dependencies of target gen_onnx_proto
  Scanning dependencies of target onnxifi_dummy
  Scanning dependencies of target onnxifi_loader
  [  4%] Building C object CMakeFiles/onnxifi_dummy.dir/onnx/onnxifi_dummy.c.o
  [  4%] Running gen_proto.py on onnx/onnx.in.proto
  [  4%] Building C object CMakeFiles/onnxifi_loader.dir/onnx/onnxifi_loader.c.o
  /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/onnxifi_dummy.c: In function ‘onnxGetExtensionFunctionAddress’:
  /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/onnxifi_dummy.c:173:21: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
             *function = &onnxGetExtensionFunctionAddress;
                       ^
  /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/onnxifi_dummy.c:176:21: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
             *function = &onnxSetIOAndRunGraph;
                       ^
  [  6%] Linking C static library libonnxifi_loader.a
  Processing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/onnx.in.proto
  Writing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-ml.proto
  Writing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-ml.proto3
  generating /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx_pb.py
  [  7%] Linking C shared library libonnxifi_dummy.so
  [  9%] Running C++ protocol buffer compiler on /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-ml.proto
  [  9%] Built target onnxifi_loader
  Scanning dependencies of target onnxifi_wrapper
  [  9%] Built target onnxifi_dummy
  [ 10%] Building C object CMakeFiles/onnxifi_wrapper.dir/onnx/onnxifi_wrapper.c.o
  Writing mypy to onnx/onnx_ml_pb2.pyi
  [ 12%] Linking C shared module libonnxifi.so
  [ 12%] Built target gen_onnx_proto
  [ 15%] Running gen_proto.py on onnx/onnx-data.in.proto
  [ 15%] Running gen_proto.py on onnx/onnx-operators.in.proto
  [ 15%] Built target onnxifi_wrapper
  Processing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/onnx-data.in.proto
  Writing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-data.proto
  Writing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-data.proto3
  generating /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx_data_pb.py
  Processing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/onnx-operators.in.proto
  Writing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-operators-ml.proto
  Writing /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-operators-ml.proto3
  generating /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx_operators_pb.py
  [ 18%] Running C++ protocol buffer compiler on /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-operators-ml.proto
  [ 18%] Running C++ protocol buffer compiler on /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/.setuptools-cmake-build/onnx/onnx-data.proto
  Writing mypy to onnx/onnx_data_pb2.pyi
  Writing mypy to onnx/onnx_operators_ml_pb2.pyi
  Scanning dependencies of target onnx_proto
  [ 21%] Building CXX object CMakeFiles/onnx_proto.dir/onnx/onnx-data.pb.cc.o
  [ 21%] Building CXX object CMakeFiles/onnx_proto.dir/onnx/onnx-operators-ml.pb.cc.o
  [ 22%] Building CXX object CMakeFiles/onnx_proto.dir/onnx/onnx-ml.pb.cc.o
  [ 24%] Linking CXX static library libonnx_proto.a
  [ 27%] Built target onnx_proto
  Scanning dependencies of target onnx
  [ 33%] Building CXX object CMakeFiles/onnx.dir/onnx/checker.cc.o
  [ 33%] Building CXX object CMakeFiles/onnx.dir/onnx/common/ir_pb_converter.cc.o
  [ 33%] Building CXX object CMakeFiles/onnx.dir/onnx/common/assertions.cc.o
  [ 33%] Building CXX object CMakeFiles/onnx.dir/onnx/common/interned_strings.cc.o
  [ 34%] Building CXX object CMakeFiles/onnx.dir/onnx/common/model_helpers.cc.o
  [ 36%] Building CXX object CMakeFiles/onnx.dir/onnx/common/status.cc.o
  [ 37%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/attr_proto_util.cc.o
  [ 39%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/controlflow/defs.cc.o
  [ 40%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/controlflow/old.cc.o
  [ 42%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/data_type_utils.cc.o
  [ 43%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/function.cc.o
  [ 45%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/generator/defs.cc.o
  [ 46%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/generator/old.cc.o
  [ 48%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/logical/defs.cc.o
  [ 50%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/logical/old.cc.o
  [ 51%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/math/defs.cc.o
  [ 53%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/math/old.cc.o
  [ 54%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/nn/defs.cc.o
  [ 56%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/nn/old.cc.o
  [ 57%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/object_detection/defs.cc.o
  [ 59%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/object_detection/old.cc.o
  [ 60%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/quantization/defs.cc.o
  [ 62%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/quantization/old.cc.o
  [ 63%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/reduction/defs.cc.o
  [ 65%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/reduction/old.cc.o
  [ 66%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/rnn/defs.cc.o
  [ 68%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/rnn/old.cc.o
  [ 69%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/schema.cc.o
  [ 71%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/sequence/defs.cc.o
  [ 72%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/tensor/defs.cc.o
  [ 74%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/tensor/old.cc.o
  [ 75%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/tensor/utils.cc.o
  [ 77%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/tensor_proto_util.cc.o
  [ 78%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/tensor_util.cc.o
  [ 80%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/traditionalml/defs.cc.o
  [ 81%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/traditionalml/old.cc.o
  [ 83%] Building CXX object CMakeFiles/onnx.dir/onnx/defs/training/defs.cc.o
  [ 84%] Building CXX object CMakeFiles/onnx.dir/onnx/onnxifi_utils.cc.o
  [ 86%] Building CXX object CMakeFiles/onnx.dir/onnx/optimizer/optimize.cc.o
  [ 87%] Building CXX object CMakeFiles/onnx.dir/onnx/optimizer/pass.cc.o
  [ 89%] Building CXX object CMakeFiles/onnx.dir/onnx/optimizer/pass_manager.cc.o
  [ 90%] Building CXX object CMakeFiles/onnx.dir/onnx/optimizer/pass_registry.cc.o
  [ 92%] Building CXX object CMakeFiles/onnx.dir/onnx/shape_inference/implementation.cc.o
  [ 93%] Building CXX object CMakeFiles/onnx.dir/onnx/version_converter/convert.cc.o
  [ 95%] Building CXX object CMakeFiles/onnx.dir/onnx/version_converter/helper.cc.o
  [ 96%] Linking CXX static library libonnx.a
  [ 96%] Built target onnx
  Scanning dependencies of target onnx_cpp2py_export
  [ 98%] Building CXX object CMakeFiles/onnx_cpp2py_export.dir/onnx/cpp2py_export.cc.o
  In file included from /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/third_party/pybind11/include/pybind11/pytypes.h:12:0,
                   from /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/third_party/pybind11/include/pybind11/cast.h:13,
                   from /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/third_party/pybind11/include/pybind11/attr.h:13,
                   from /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/third_party/pybind11/include/pybind11/pybind11.h:45,
                   from /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/onnx/cpp2py_export.cc:1:
  /tmp/pip-install-4hcuagp3/onnx_b3380438a9fc4e2c8f80dae3fd60cfd7/third_party/pybind11/include/pybind11/detail/common.h:122:10: fatal error: Python.h: 没有那个文件或目录
   #include <Python.h>
            ^~~~~~~~~~
  compilation terminated.
  CMakeFiles/onnx_cpp2py_export.dir/build.make:62: recipe for target 'CMakeFiles/onnx_cpp2py_export.dir/onnx/cpp2py_export.cc.o' failed
  make[2]: *** [CMakeFiles/onnx_cpp2py_export.dir/onnx/cpp2py_export.cc.o] Error 1
  CMakeFiles/Makefile2:349: recipe for target 'CMakeFiles/onnx_cpp2py_export.dir/all' failed
  make[1]: *** [CMakeFiles/onnx_cpp2py_export.dir/all] Error 2
  Makefile:129: recipe for target 'all' failed
  make: *** [all] Error 2
  /tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/setuptools/dist.py:645: UserWarning: Usage of dash-separated 'license-file' will not be supported in future versions. Please use the underscore name 'license_file' instead
    % (opt, underscore_opt))
  Traceback (most recent call last):
    File "/home/yaoz/.local/lib/python3.6/site-packages/pip/_vendor/pep517/_in_process.py", line 280, in <module>
      main()
    File "/home/yaoz/.local/lib/python3.6/site-packages/pip/_vendor/pep517/_in_process.py", line 263, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/home/yaoz/.local/lib/python3.6/site-packages/pip/_vendor/pep517/_in_process.py", line 205, in build_wheel
      metadata_directory)
    File "/tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 217, in build_wheel
      wheel_directory, config_settings)
    File "/tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 202, in _build_with_temp_dir
      self.run_setup()
    File "/tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 254, in run_setup
      self).run_setup(setup_script=setup_script)
    File "/tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 145, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 341, in <module>
      'backend-test-tools = onnx.backend.test.cmd_tools:main',
    File "/tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/setuptools/__init__.py", line 153, in setup
      return distutils.core.setup(**attrs)
    File "/usr/lib/python3.6/distutils/core.py", line 148, in setup
      dist.run_commands()
    File "/usr/lib/python3.6/distutils/dist.py", line 955, in run_commands
      self.run_command(cmd)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "/tmp/pip-build-env-5bdpwz7b/overlay/lib/python3.6/site-packages/wheel/bdist_wheel.py", line 299, in run
      self.run_command('build')
    File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "/usr/lib/python3.6/distutils/command/build.py", line 135, in run
      self.run_command(cmd_name)
    File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "setup.py", line 217, in run
      self.run_command('cmake_build')
    File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
      cmd_obj.run()
    File "setup.py", line 211, in run
      subprocess.check_call(build_args)
    File "/usr/lib/python3.6/subprocess.py", line 311, in check_call
      raise CalledProcessError(retcode, cmd)
  subprocess.CalledProcessError: Command '['/usr/bin/cmake', '--build', '.', '--', '-j', '4']' returned non-zero exit status 2.
  ----------------------------------------
  ERROR: Failed building wheel for onnx
Failed to build onnx
ERROR: Could not build wheels for onnx which use PEP 517 and cannot be installed directly

错误原因：没有安装python3-dev
尝试输入命令安装：sudo apt-get install python3-dev
出现如下错误：

有一些软件包无法被安装。如果您用的是 unstable 发行版，这也许是
因为系统无法达到您要求的状态造成的。该版本中可能会有一些您需要的软件
包尚未被创建或是它们已被从新到(Incoming)目录移出。
下列信息可能会对解决问题有所帮助：

下列软件包有未满足的依赖关系：
 python3-dev : 依赖: python3 (= 3.6.5-3) 但是 3.6.7-1~18.04 正要被安装
               依赖: libpython3-dev (= 3.6.5-3) 但是它将不会被安装
               依赖: python3.6-dev (>= 3.6.5-2~) 但是它将不会被安装
E: 无法修正错误，因为您要求某些软件包保持现状，就是它们破坏了软件包间的依赖关系。

解决办法：使用aptitude安装：sudo aptitude install python3-dev
如果没有安装aptitude则要先安装：sudo apt-get install aptitude

下列“新”软件包将被安装。         
  dh-python{
    a} libpython3-dev{
    a} libpython3.6-dev{
    ab} python3-dev{
    b} python3.6-dev{
    ab} 
0 个软件包被升级，新安装 5 个， 0 个将被删除， 同时 0 个将不升级。
需要获取 2,886 kB 的存档。 解包后将要使用 16.8 MB。
下列软件包存在未满足的依赖关系：
 python3-dev : 依赖: python3 (= 3.6.5-3) but 3.6.7-1~18.04 is installed
 libpython3.6-dev : 依赖: libpython3.6-stdlib (= 3.6.5-3) but 3.6.9-1~18.04ubuntu1 is installed
                    依赖: libpython3.6 (= 3.6.5-3) but 3.6.9-1~18.04ubuntu1 is installed
 python3.6-dev : 依赖: python3.6 (= 3.6.5-3) but 3.6.9-1~18.04ubuntu1 is installed
                 依赖: libpython3.6 (= 3.6.5-3) but 3.6.9-1~18.04ubuntu1 is installed
打开：42；关闭；591；defer: 26; 冲突；40                                                                                    .下列动作将解决这些依赖关系：
     保持 下列软件包于其当前版本：
1)     libpython3-dev [未安装的]  
2)     libpython3.6-dev [未安装的]
3)     python3-dev [未安装的]     
4)     python3.6-dev [未安装的]   
是否接受该解决方案？[Y/n/q/?]

选择y回车，会保持原来的状态。这里不能安装是因为官方源出问题，没有更新最新的python3-dev包。
我查过，官方主要服务器的python3-dev的最新版本仅支持python3.6.5版本的，然而我的jetson nano自带的是python3.6.9。如果使用aptitude强行降级安装的话，那么你的python3环境就会直接崩溃，你导入任何模块都会出现：非法指令(核心已转储)的错误。所以在这里提醒一下大家。
我找到的解决办法是：切换国内的ubuntu源（淘宝店商家给的教程提示：切换国内源有风险，可能会出现其它不兼容的问题，但目前本人暂未发现后遗症）：

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main multiverse restricted universe

切换之后更新一下软件源，然后就可以安装python3-dev了。
安装好之后，继续安装onnx：

~:pip3 install onnx==1.6.0
Defaulting to user installation because normal site-packages is not writeable
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting onnx==1.6.0
  Using cached https://pypi.tuna.tsinghua.edu.cn/packages/81/a9/a14c3bc32908c37b46b19a89eb6185b0c90fd9c03ef12379d51940b8fc71/onnx-1.6.0.t
Requirement already satisfied: protobuf in /home/yaoz/.local/lib/python3.6/site-packages (from onnx==1.6.0) (3.15.6)
Requirement already satisfied: numpy in /home/yaoz/.local/lib/python3.6/site-packages (from onnx==1.6.0) (1.16.1)
Requirement already satisfied: six in /home/yaoz/.local/lib/python3.6/site-packages (from onnx==1.6.0) (1.15.0)
Requirement already satisfied: typing-extensions>=3.6.2.1 in /home/yaoz/.local/lib/python3.6/site-packages (from onnx==1.6.0) (3.7.4.3)
Building wheels for collected packages: onnx
  Building wheel for onnx (setup.py) ... done
  Created wheel for onnx: filename=onnx-1.6.0-cp36-cp36m-linux_aarch64.whl size=4203662 sha256=152b8bfe50f59264c41d7bd85a7d97710e955172297b9f3da68de98b329634e3
  Stored in directory: /home/yaoz/.cache/pip/wheels/cc/b4/8e/7f4b6dabf5070e8c22bdbfe218048484b1cc0745ddf31020f4
Successfully built onnx
Installing collected packages: onnx
Successfully installed onnx-1.6.0

成功。