firefly3399开发板 ARM64 aarch64 等 安装新版tensorflow，解决版本不兼容问题

黄锦成

由于目前的TensorFlow版本比较老旧导致很多算法和语法不通用编译报错，且没有几个贴详细说明如何在arm64上安装TensorFlow，借此为理由，写下人生第一个博客和firefly帖子。
---from中山
注意，安装的过程中会自动下载必须的包，需要连接好网络。脱机安装很可能失败。

1.安装必要的python环境

1. <font color="Black">sudo apt-get install libpython3.5-dev wget python3-pip python3-dev python3.5</font>

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2.下载和安装别人编译好的arm（aarch64）版本tensorflow（因为自己编译需要配大量环境和占用很多资源，对于嵌入式板上编译就变得非常不可能，且现有的方法更为简便）

网上有别人编译好的TensorFlow，找到相应的文件。https://github.com/lhelontra/tensorflow-on-arm/releases
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1. #使用wget下载tensorflow-1.9.0-cp35-none-linux_aarch64.whl到当前目录
   
2. #命名规则：cp35对赢python3.5，aarch64表示架构信息
   
3. wget https://github.com/lhelontra/tensorflow-on-arm/releases/download/v1.9.0/tensorflow-1.9.0-cp35-none-linux_aarch64.whl
   
4. 
   
5. #必须制定使用python3.5安装tensorflow-1.9.0-cp35-none-linux_aarch64.whl
   
6. sudo python3.5 -m pip install tensorflow-1.9.0-cp35-none-linux_aarch64.whl

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到此为止，TensorFlow已经安装完成了

3.修改python默认为python3.5

为了因为C++调用python时，默认是调用python2.7，这导致很多python3.5的语法报错。所以需要更改python默认软连接

1. firefly@firefly:~/opencv-3-2$ python
   
2. Python 3.5.2 (default, Nov 23 2017, 16:37:01)
   
3. [GCC 5.4.0 20160609] on linux
   
4. Type "help", "copyright", "credits" or "license" for more information.
   
5. >>> import tensorflow as tf
   
6. >>> hello = tf.constant('Hello world!')
   
7. >>> sess = tf.Session()
   
8. >>> print(sess.run(hello))
   
9. b'Hello world!'

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测试调用一下：

1. firefly@firefly:~/opencv-3-2$ python
   
2. Python 3.5.2 (default, Nov 23 2017, 16:37:01)
   
3. [GCC 5.4.0 20160609] on linux
   
4. Type "help", "copyright", "credits" or "license" for more information.
   
5. >>> import tensorflow as tf
   
6. >>> hello = tf.constant('Hello world!')
   
7. >>> sess = tf.Session()
   
8. >>> print(sess.run(hello))
   
9. b'Hello world!'

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4.出现的错误

有时候可能会出现缺少库额问题 bstdc++.so.6: version `GLIBCXX_3.4.22' not found (required by /usr/local/lib/python3.5/dist-packages/tensorflow/python/_pywrap_tensorflow_internal.so

参考: libstdc++.so.6: version `GLIBCXX3.4.22' not found

https://blog.csdn.net/u011961856/article/details/79644342

1.   File "/usr/lib/python3.5/imp.py", line 242, in load_module
   
2.     return load_dynamic(name, filename, file)
   
3.   File "/usr/lib/python3.5/imp.py", line 342, in load_dynamic
   
4.     return _load(spec)
   
5. ImportError: /usr/lib/aarch64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.22' not found (required by /usr/local/lib/python3.5/dist-packages/tensorflow/python/_pywrap_tensorflow_internal.so)
   
6. 
   
7. 
   
8. Failed to load the native TensorFlow runtime.
   
9. 
   
10. See https://www.tensorflow.org/install/install_sources#common_installation_problems
    
11. 
    
12. for some common reasons and solutions.  Include the entire stack trace
    
13. above this error message when asking for help.
    
14. >>

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1. sudo add-apt-repository ppa:ubuntu-toolchain-r/test
   
2. sudo apt-get update
   
3. sudo apt-get upgrade
   
4. sudo apt-get dist-upgrade

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参考文献：

• libstdc++.so.6: version `GLIBCXX3.4.22' not foundhttps://blog.csdn.net/u011961856/article/details/79644342
• 【新手向】TensorFlow 安装教程：RK3399上运行谷歌人工智能http://dev.t-firefly.com/forum.php?mod=viewthread&tid=12126&highlight=tensorflow
• 树莓派搭建TensorFlowhttps://blog.csdn.net/u014271612/article/details/58586630
  

leung先森

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