交叉编译python3.8版本
下载源码
https://www.python.org/downloads/source/。选择Python-3.8.20的xz版本。
交叉编译
配置交叉编译工具链环境，由于使用的是模组厂商提供的yocto编译链，aarch64-zxic-linux-gcc，里面已经包含了很多库和头文件，所以不需要额外下载单独编译。
最终配置参数命令：
mkdir local_build ./configure --host=arm-linux --build=x86_64-linux-gnu --prefix=/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build/问题1：提示交叉编译的文件不能运行，需要同时设置host和build参数
[wangyb@wangyb-VirtualBox:Python-3.8.20]$ ./configure configure: loading site script /home/wangyb/sda3/zm9300c-V2XR240060/toolchain/site-config-aarch64-zxic-linux checking build system type... x86_64-pc-linux-gnu checking host system type... x86_64-pc-linux-gnu checking for python3.8... python3.8 checking for --enable-universalsdk... no checking for --with-universal-archs... no checking MACHDEP... "linux" checking for gcc... aarch64-zxic-linux-gcc -mcpu=cortex-a53+crc -fstack-protector-all -pie -fPIE -Wformat -Wformat-security -Werror=format-security -fstack-protector-all -pie -fPIE -Wformat -Wformat-security -Werror=format-security --sysroot=/home/wangyb/sda3/zm9300c-V2XR240060/toolchain/sysroots/aarch64-zxic-linux checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... configure: error: in `/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20': configure: error: cannot run C compiled programs. If you meant to cross compile, use `--host'. See `config.log' for more details configure:4045: checking whether we are cross compiling configure:4053: aarch64-zxic-linux-gcc --sysroot=/home/wangyb/sda3/zm9300c-V2XR240060/toolchain/sysroots/aarch64-zxic-linux -o conftest -O2 -pipe -g -feliminate-unused-debug-types -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fstack-protector-all -Wl,-z,relro,-z,now -fstack-protector-all -Wl,-z,relro,-z,now conftest.c >&5 configure:4057: $? = 0 configure:4064: ./conftest ./configure: line 4066: ./conftest: cannot execute binary file: Exec format error configure:4068: $? = 126 configure:4075: error: in `/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20': configure:4077: error: cannot run C compiled programs. If you meant to cross compile, use `--host'. See `config.log' for more details问题2：提示/dev/ptmx... not set，查看是存在/dev/ptmx文件，所以需要加上yes，删除目录重新解压重新配置解决。
./configure --host=arm-linux --build=x86_64-linux-gnu --prefix=/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build/ --disable-ipv6 ac_cv_file__dev_ptmx=yes问题3：提示/dev/ptc... not set，查看没有/dev/ptc文件，所以需要设置no
./configure --host=arm-linux --build=x86_64-linux-gnu --prefix=/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build/ --disable-ipv6 ac_cv_file__dev_ptmx=yes ac_cv_file__dev_ptc=nomake编译成功：
[wangyb@wangyb-VirtualBox:Python-3.8.20]$ file python python: ELF 64-bit LSB shared object, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, BuildID[sha1]=a750cfafb04ee7d9d390d4b2491ce932e8bfa724, for GNU/Linux 3.14.0, not stripped [wangyb@wangyb-VirtualBox:Python-3.8.20]$ ls python -lh -rwxrwxr-x 1 wangyb wangyb 17M 2月 25 14:25 python [wangyb@wangyb-VirtualBox:Python-3.8.20]$ aarch64-zxic-linux-strip python [wangyb@wangyb-VirtualBox:Python-3.8.20]$ ls python -lh -rwxrwxr-x 1 wangyb wangyb 3.3M 2月 25 14:30 python linux_genvict:root# ./python-strip -V Python 3.8.20make install进行依赖库和文件安装到目录local_build，否则单独的python不能成功运行
linux_genvict:root# ./python Could not find platform independent libraries <prefix> Could not find platform dependent libraries <exec_prefix> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] Python path configuration: PYTHONHOME = (not set) PYTHONPATH = (not set) program name = './python-strip' isolated = 0 environment = 1 user site = 1 import site = 1 sys._base_executable = '/root/python-strip' sys.base_prefix = '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build' sys.base_exec_prefix = '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build' sys.executable = '/root/python-strip' sys.prefix = '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build' sys.exec_prefix = '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build' sys.path = [ '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build/lib/python38.zip', '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build/lib/python3.8', '/home/wangyb/sda3/zm9300-tools/tools/Python-3.8.20/local_build/lib/lib-dynload', ] Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding Python runtime state: core initialized ModuleNotFoundError: No module named 'encodings' Current thread 0x0000007fbd09c600 (most recent call first): <no Python frame> linux_genvict:root#安装运行
local_build目录200MB，压缩后拷贝到板子环境中，解压到emmc存储中进行运行测试。
[wangyb@wangyb-VirtualBox:Python-3.8.20]$ du -sm local_build/ 200 local_build/ linux_genvict:root# /mnt/emmc1/local_build/bin/python3 -V Python 3.8.20 linux_genvict:root# /mnt/emmc1/local_build/bin/python3 Type "help", "copyright", "credits" or "license" for more information. >>> print("hello") hello >>>如果需要放在发布包中需要压缩后存放app目录。