Ubuntu22.04下源码编译安装pythonocc-7.8
本文先容Ubuntu下手动编译安装pythonocc，及安装过程遇到的各种坑
根本依赖安装
- sudo apt-get update
- sudo apt-get install -y wget libglu1-mesa-dev libgl1-mesa-dev libxmu-dev libxi-dev build-essential cmake libfreetype6-dev tk-dev python3-dev rapidjson-dev python3 git python3-pip libpcre2-dev
SWIG是一个用来把C/C++程序和Perl，Python，Ruby，Tcl等脚本语言连接起来的接口编译器。它的工作原理是获取C/C++头文件的声明，并使用它们生成可以访问底层C/C++代码的脚本语言
https://github.com/swig/swig
- wget http://prdownloads.sourceforge.net/swig/swig-4.1.1.tar.gz
- tar -zxvf swig-4.1.1.tar.gz
- cd swig-4.1.1
- ./configure && make -j4 && make install
- # 注意安装可能报错没有权限，可以使用超级管理员身份安装`sudo su`
编译构建OCC
下载 occ 7.8.1
下载到当地/home/myPC/occ/occt-bd2a789.tar.gz
- cd /home/myPC/occ/
- tar -zxvf occt-bd2a789.tar.gz
- cd occt-bd2a789
- mkdir cmake-build
- cd cmake-build
- $ cmake -DINSTALL_DIR=/opt/occt781 -DBUILD_RELEASE_DISABLE_EXCEPTIONS=OFF ..
- make -j4
- sudo make install
- echo "/opt/occt781/lib" >> /etc/ld.so.conf.d/occt.conf
开始安装pythonocc-core
首先下载pythonocc源码
- git clone https://github.com/tpaviot/pythonocc-core.git
- cd pythonocc-core
- mkdir cmake-build && cd cmake-build
- # 安装目录设置在/opt/pythonocc-core
- cmake -DOCCT_INCLUDE_DIR=/opt/occt781/include/opencascade -DOCCT_LIBRARY_DIR=/opt/occt781/lib -DPYTHONOCC_BUILD_TYPE=Release -DPYTHONOCC_INSTALL_DIRECTORY=/opt/pythonocc-core ..
- # 如直接采用目录python路径，可不设置目录参数 -DPYTHONOCC_INSTALL_DIRECTORY
- # cmake -DOCCT_INCLUDE_DIR=/opt/occt781/include/opencascade -DOCCT_LIBRARY_DIR=/opt/occt781/lib -DPYTHONOCC_BUILD_TYPE=Release ..
- # 安装时，则会安装到默认的python第三方包目录
- -- The C compiler identification is GNU 11.4.0
- -- The CXX compiler identification is GNU 11.4.0
- -- Detecting C compiler ABI info
- -- Detecting C compiler ABI info - done
- -- Check for working C compiler: /usr/bin/cc - skipped
- -- Detecting C compile features
- -- Detecting C compile features - done
- -- Detecting CXX compiler ABI info
- -- Detecting CXX compiler ABI info - done
- -- Check for working CXX compiler: /usr/bin/c++ - skipped
- -- Detecting CXX compile features
- -- Detecting CXX compile features - done
- -- Found OpenGL: /usr/lib/x86_64-linux-gnu/libOpenGL.so
- -- Found Python3: /home/bing/miniconda3/bin/python3.1 (found version "3.11.5") found components: Interpreter Development Development.Module Development.Embed
- -- Python3 interpreter:/home/bing/miniconda3/bin/python3.1
- -- Python include directory: /home/bing/miniconda3/include/python3.11
- -- Python library release: /home/bing/miniconda3/lib/libpython3.11.so
- CMake Error at /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
- Could NOT find SWIG: Found unsuitable version "4.1.1", but required is at
- least "4.2.1" (found /usr/local/bin/swig, )
- Call Stack (most recent call first):
- /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:592 (_FPHSA_FAILURE_MESSAGE)
- /usr/share/cmake-3.22/Modules/FindSWIG.cmake:153 (find_package_handle_standard_args)
- CMakeLists.txt:113 (find_package)
这里偷懒，尝试修改一下pythonocc-core/CMakeLists.txt
- ...
- ########
- # SWIG #
- ########
- find_package(SWIG 4.2.1 REQUIRED)
- include(${SWIG_USE_FILE})
- ...
继续安装
添加动态库目次
- # 打开 ~/.bashrc 添加如下内容
- export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/occt781/lib
- # 完了后，需要执行一下`source ./bashrc`
安装完成后，测试验证验证一下
- $ python
- Python 3.11.5 (main, Sep 11 2023, 13:54:46) [GCC 11.2.0] on linux
- Type "help", "copyright", "credits" or "license" for more information.
- >>> from OCC.Core.gp import gp_Pnt
- Traceback (most recent call last):
- File "<stdin>", line 1, in <module>
- ModuleNotFoundError: No module named 'OCC'
If PYTHONOCC_INSTALL_DIRECTORY is unset, it will be installed to site-packages/OCC；如果PYTHONOCC_INSTALL_DIRECTORY未设置，将安装到site-packages/OCC，这个目次被设置为别的目次了，当时想着这个这类目次统一安装到/opt/pythonocc-core目次，谁知道这个目次不能乱设置；
site-packages这个目次三python的第三方依赖包的目次，以是默认环境，就会放在你的python的这个目次下，在python环境下，当import时，py就能正常找到库；
显然由前面的pythonocc的cmake阶段，被简单明确指定目次了；而一样平常环境下是不用修改的，主动会识别到python的site-packages目次的，当我们接纳的conda，有多个假造环境安装时，而我们又接纳了手动构建编译pythonocc包时，这是就需要指定这个目次到指定的conda假造环境中；
怎样查看当前python的第三方库目次呢，可以接纳如下方式查看
- # 查看一下当前使用的python
- $ which python
- /home/myPC/miniconda3/bin/python
- # 进入python
- $ python
- Python 3.11.5 (main, Sep 11 2023, 13:54:46) [GCC 11.2.0] on linux
- Type "help", "copyright", "credits" or "license" for more information.
- >>> import site
- >>> print(site.getsitepackages())
- ['/home/myPC/miniconda3/lib/python3.11/site-packages']
- $ ln -s /opt/pythonocc-core /home/myPC/miniconda3/lib/python3.11/site-packages/OCC
- $ python
- Python 3.11.5 (main, Sep 11 2023, 13:54:46) [GCC 11.2.0] on linux
- Type "help", "copyright", "credits" or "license" for more information.
- >>> from OCC.Core.gp import gp_Pnt
- Traceback (most recent call last):
- File "<stdin>", line 1, in <module>
- File "/home/bing/miniconda3/lib/python3.11/site-packages/OCC/Core/gp.py", line 164, in <module>
- from six import with_metaclass
- ModuleNotFoundError: No module named 'six'
再次测试pythonocc-occ
- $ python
- >>> from OCC.Core.gp import gp_Pnt
- >>> p = gp_Pnt(1., 2., 3.)
- >>> p.X()
- 1.0
- # 下载demo
- $ git clone https://github.com/tpaviot/pythonocc-demos
- $ cd pythonocc-demos/examples
- $ python core_helloworld.py
竣事
当然，不想折腾的同学，直接看这里，conda安装occ
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