编译 OP-TEE 源码（MP135）

stonechan02

STM32MP135开发板， 我按照教程，编译 OP-TEE 源码会出错：
  GEN     /home/book/stm32mp135/system/optee/optee-os-stm32mp-3.16.0-stm32mp1-r1/../build/stm32mp135d-atk/core/ta_pub_key.c
Traceback (most recent call last):
  File "scripts/pem_to_pub_c.py", line 71, in <module>
    main()
  File "scripts/pem_to_pub_c.py", line 24, in main
    from cryptography.hazmat.backends import default_backend
ImportError: No module named 'cryptography'
mk/subdir.mk:181: recipe for target '/home/book/stm32mp135/system/optee/optee-os-stm32mp-3.16.0-stm32mp1-r1/../build/stm32mp135d-atk/core/ta_pub_key.c' failed


百度后，又是升级python，又是去升级处理pip以及cryptography，一天操作下来，全都没有效果，麻烦各位帮我诊断一下。。。
另外编译“TF-A”以及“uboot”均一切正常！！！就是op-tee有问题！！！


下面的是我目前升级了电脑上的几种软件的版本号（因为编译有问题，然后才将python从2.7升级上来的，升级后还是不行，看来问题也不是这里）：
~/stm32mp135/system/optee/optee-os-stm32mp-3.16.0-stm32mp1-r1$ python --version
Python 3.7.5


~/stm32mp135/system/optee/optee-os-stm32mp-3.16.0-stm32mp1-r1$ pip --version
pip 23.1.2 from /usr/local/lib/python3.7/dist-packages/pip (python 3.7)


~/stm32mp135/system/optee/optee-os-stm32mp-3.16.0-stm32mp1-r1$ pip show Cryptography
WARNING: The directory '/home/book/.cache/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you should use sudo's -H flag.
Name: cryptography
Version: 3.4.8
Summary: cryptography is a package which provides cryptographic recipes and primitives to Python developers.
Home-page: https://github.com/pyca/cryptography
Author: The Python Cryptographic Authority and individual contributors
Author-email: cryptography-dev@python.org
License: BSD or Apache License, Version 2.0
Location: /home/book/.local/lib/python3.7/site-packages
Requires: cffi
Required-by:

flyzeng

执行命令安装库：python -m pip install cryptography

flyzeng

估计你的python环境有问题，你的pip show指令会提示warning。看看下面正常的：

flyzeng

也可以下载资料配套的虚拟机来使用看看：