Installing Python Source Code

Prerequisites

GCC, CMake, and Make have been installed.

Procedure

This section uses the openEuler OS as an example to describe how to install Python from source.

1. Go to Python Source Releases, download the XZ software package of Python 3.11.x, and decompress the package to the local environment.
   This section uses Python 3.11.4 as an example and /opt/buildtools as the installation directory.

   cd /opt/buildtools
   tar -xf Python-3.11.4.tar.xz

2. Set compilation parameters and create a Python working directory /opt/buildtools/python-3.11.

   tmp_cpus=$(grep -w processor /proc/cpuinfo|wc -l)
   install_dir=/opt/buildtools/python-3.11
   mkdir -p ${install_dir}

3. Compile Python.

   cd Python-3.11.4
   ./configure CFLAGS="-D_FORTIFY_SOURCE=2 -O2 -fstack-protector-strong" CPPFLAGS="-D_FORTIFY_SOURCE=2 -O2 -fstack-protector-strong" LDFLAGS="-Wl,-z,relro,-z,now -s" --prefix=${install_dir} -enable-shared
   make -j ${tmp_cpus}
   make install
   sudo cp libpython3.11.so.1.0 libpython3.11.so /usr/lib64

   

   If the OS is not openEuler, copy libpython3.11.so.1.0 and libpython3.11.so to the corresponding system library directory (for example, /lib/aarch64-linux-gnu of Ubuntu in the Arm architecture).

4. Modify Python symbolic links in /usr/local/bin. If a rollback is required, back up the original Python file.

   [ -f /usr/local/bin/python3 ] && rm -f /usr/local/bin/python3
   [ -e ${install_dir}/bin/python3.11 ] && ln -sf ${install_dir}/bin/python3.11 /usr/local/bin/python3
   [ -f /usr/local/bin/python ] && rm -f /usr/local/bin/python
   [ -e ${install_dir}/bin/python3.11 ] && ln -sf ${install_dir}/bin/python3.11 /usr/local/bin/python
   [ -f /usr/local/bin/pip3 ] && rm -f /usr/local/bin/pip3
   [ -e ${install_dir}/bin/pip3.11 ] && ln -sf ${install_dir}/bin/pip3.11 /usr/local/bin/pip3

5. Query the Python version.

   /usr/local/bin/python3 -V

   The installation is successful if the following information is displayed:

   Python 3.11.4

• After the installation is complete, an error message similar to "xxx /usr/bin/python3 xxx" may be reported during firmware compilation. Open the terminal again and continue to run the firmware compilation command.
• The preceding steps modify only the Python symbolic links in /usr/local/bin and do not modify those in /usr/bin. This is to avoid affecting OS commands, such as yum. If Python-related errors occur during subsequent operations, try restoring the symbolic links in /usr/local/bin to resolve the issue.