Bootstrapping python3.13 with JIT enabled appears to require pre-built python3 #124967
Description
Documentation
At https://devguide.python.org/getting-started/setup-building/#avoid-recreating-auto-generated-files
it is stated that whilst some auto-generated files do require python, they are prebuild by default in git and tarballs such that one can build python without pre-existing python.
Attempting to do a build of python3.13 rc3 without a pre-existing python results in this build failure, and with JIT enabled to "yes-off"
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2024/10/04 01:26:24 INFO checking for Python interpreter freezing... ./_bootstrap_python name=Configure
2024/10/04 01:26:24 INFO checking for python3.13... no name=Configure
2024/10/04 01:26:24 INFO checking for python3.13... no name=Configure
2024/10/04 01:26:24 INFO checking for python3.12... no name=Configure
2024/10/04 01:26:24 INFO checking for python3.11... no name=Configure
2024/10/04 01:26:24 INFO checking for python3.10... no name=Configure
2024/10/04 01:26:24 INFO checking for python3... no name=Configure
2024/10/04 01:26:24 INFO checking for python... no name=Configure
2024/10/04 01:26:24 INFO checking Python for regen version... missing name=Configure
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2024/10/04 01:26:25 INFO checking for --enable-experimental-jit... -D_Py_TIER2=3 -D_Py_JIT name=Configure
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2024/10/04 01:27:01 INFO python3 ./Tools/jit/build.py x86_64-pc-linux-gnu uses=autoconf/make
2024/10/04 01:27:01 WARN /bin/sh: python3: not found uses=autoconf/make
...
Does building with JIT require python3 to be available? Can bootstrap python be used?
Note, golang & gcc for example build themselves multiple times (3 stage bootstrap). It would be convenient if python build system could "--enable-bootstrap" such that after bootstrap-python a more full python is built; which is then used to perform final build with ability to regenerate generated code and build with JIT.
Any improvements to documentation w.r.t. installing dependencies, or how to do a throw-away temporary build without reggenerating files and without JIT, and reuse that python to build final build would be nice.