Add configure.py, a configure.ac replacement#146034
Add configure.py, a configure.ac replacement#146034nascheme wants to merge 40 commits intopython:mainfrom
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Assisted-by: claude-opus-4-6
Keep srcdir as an absolute path if it was originally. Match host_prefix setting done by configure.ac. Fix AWK implementations of pyconf_env_var(), pyconf_check_header() and pyconf_check_decl().
Match the autoconf macro behavior: set per-package variables (ZLIB_CFLAGS, ZLIB_LIBS, etc.) only when the system is Emscripten and the user hasn't already provided values.
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Pass srcdir to the AWK script. Look in srcdir when generating config files.
It seems some awk implementations have memory corruption bug, avoid creating large strings with concat.
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CPython's build configuration is driven by
configure.ac(8,344 lines, ~271KB), which uses autoconf/M4 macros to generate a 946 KB shell script
(
configure). This system is:This replaces it with a Python-based build configuration system where
Tools/configure/configure.pyis a real Python script that imports apyconfmodule. The
pyconffunctions generally match the autoconf behaviour, so thattranslation from the configure.ac file is mostly direct and mechanical.
There is also a transpiler that converts configure.py into POSIX AWK (wrapped
in a small shell stub). The transpiler lives in
Tools/configure/transpiler/and the pipeline is: Python AST → pysh_ast → awk_ast → AWK text. The sh and
AWK code needs to be compatible with those tools on various Unix-like operating
systems.