Linux下CPython源码的编译

最近在看一本python的书CPython Internals，打算研究一下CPython的代码，然后就在Linux(ubuntu)下编译了CPython源码，在此记录一下。

1. 使用git下载cpython源码

git clone --branch 3.9 https://github.com/python/cpython
cd cpython

2. 使用weget下载cpython3.9.7版本，使用这种是适用于没安装git或者访问github网络比较差的小伙伴

 wget https://github.com/python/cpython/archive/refs/tags/v3.9.7.tar.gztar zxf v3.9.7.tar.gzcd cpython-3.9.7

3. 下载完成之后，需要对cpython进行编译

# 编译工具安装
sudo apt install build-essential

# 依赖库安装
sudo apt install libssl-dev zlib1g-dev libncurses5-dev libncursesw5-dev libreadline-dev libsqlite3-dev libgdbm-dev libdb5.3-dev libbz2-dev libexpat1-dev liblzma-dev libffi-dev

4. 运行配置脚本，配置的时候选择一个debug模式，也可以不选择，这个看个人选择。

./configure --with-pydebug

5. 生成Makefile，j2表示启动两个job来加速编译，-s 表示silent，即不打印output

 make -j2 -s

注：在linux执行make --help可参考具体的参数选项

mark123@ubuntu-vm:~/cpythonCode/cpython$ make --help
Usage: make [options] [target] ...
Options:-b, -m                      Ignored for compatibility.-B, --always-make           Unconditionally make all targets.-C DIRECTORY, --directory=DIRECTORYChange to DIRECTORY before doing anything.-d                          Print lots of debugging information.--debug[=FLAGS]             Print various types of debugging information.-e, --environment-overridesEnvironment variables override makefiles.--eval=STRING               Evaluate STRING as a makefile statement.-f FILE, --file=FILE, --makefile=FILERead FILE as a makefile.-h, --help                  Print this message and exit.-i, --ignore-errors         Ignore errors from recipes.-I DIRECTORY, --include-dir=DIRECTORYSearch DIRECTORY for included makefiles.-j [N], --jobs[=N]          Allow N jobs at once; infinite jobs with no arg.-k, --keep-going            Keep going when some targets can't be made.-l [N], --load-average[=N], --max-load[=N]Don't start multiple jobs unless load is below N.-L, --check-symlink-times   Use the latest mtime between symlinks and target.-n, --just-print, --dry-run, --reconDon't actually run any recipe; just print them.-o FILE, --old-file=FILE, --assume-old=FILEConsider FILE to be very old and don't remake it.-O[TYPE], --output-sync[=TYPE]Synchronize output of parallel jobs by TYPE.-p, --print-data-base       Print make's internal database.-q, --question              Run no recipe; exit status says if up to date.-r, --no-builtin-rules      Disable the built-in implicit rules.-R, --no-builtin-variables  Disable the built-in variable settings.-s, --silent, --quiet       Don't echo recipes.-S, --no-keep-going, --stopTurns off -k.-t, --touch                 Touch targets instead of remaking them.--trace                     Print tracing information.-v, --version               Print the version number of make and exit.-w, --print-directory       Print the current directory.--no-print-directory        Turn off -w, even if it was turned on implicitly.-W FILE, --what-if=FILE, --new-file=FILE, --assume-new=FILEConsider FILE to be infinitely new.--warn-undefined-variables  Warn when an undefined variable is referenced.This program built for x86_64-pc-linux-gnu
Report bugs to <bug-make@gnu.org>
mark123@ubuntu-vm:~/cpythonCode/cpython$

6. 执行./python 进入python交互式环境

mark123@ubuntu-vm:~/cpythonCode/cpython$ ./python
Python 3.9.7 (default, Sep 11 2021, 15:23:18)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>>

至此，CPython源码已经编译完成。

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