Build requirements lacks jit dependencies #138613
Description
I'm trying to build CPython with --enable-experimental-jit=yes-off and gcc-12.
I don't see anything missing, according to
https://docs.python.org/3.14/using/configure.html#build-requirements
or
https://docs.python.org/3.14/using/configure.html#cmdoption-enable-experimental-jit
(yes, I've CPython 3.11.13 available)
or
https://docs.python.org/3.14/whatsnew/3.14.html#binary-releases-for-the-experimental-just-in-time-compiler
or
https://docs.python.org/3.13/whatsnew/3.13.html#whatsnew313-jit-compiler
or
git grep clang-19 Doc/
Though, I've (Debian 12):
$ ./configure -q --with-system-libmpdec --enable-experimental-jit=yes-off --prefix=/home/sk/3.15jit && make -s
In file included from ./Include/internal/pycore_dict.h:11,
from Objects/typeobject.c:7:
In function ‘Py_DECREF_MORTAL’,
inlined from ‘PyStackRef_XCLOSE’ at ./Include/internal/pycore_stackref.h:730:9,
inlined from ‘_PyThreadState_PopCStackRef’ at ./Include/internal/pycore_stackref.h:810:5,
inlined from ‘vectorcall_maybe’ at Objects/typeobject.c:3108:9:
./Include/internal/pycore_object.h:481:8: warning: array subscript 0 is outside array bounds of ‘PyObject[0]’ {aka ‘struct _object[]’} [-Warray-bounds]
481 | if (--op->ob_refcnt == 0) {
| ^
==========================================================
JIT support for x86_64-pc-linux-gnu is still experimental!
Please report any issues you encounter.
==========================================================
+ Exception Group Traceback (most recent call last):
| File "/home/sk/src/cpython/./Tools/jit/build.py", line 52, in <module>
| target.build(
| ~~~~~~~~~~~~^
| comment=comment,
| ^^^^^^^^^^^^^^^^
| force=args.force,
| ^^^^^^^^^^^^^^^^^
| jit_stencils=args.output_dir / f"jit_stencils-{target.triple}.h",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| )
| ^
| File "/home/sk/src/cpython/Tools/jit/_targets.py", line 236, in build
| stencil_groups = ASYNCIO_RUNNER.run(self._build_stencils())
| File "/usr/local/lib/python3.15/asyncio/runners.py", line 127, in run
| return self._loop.run_until_complete(task)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
| File "/usr/local/lib/python3.15/asyncio/base_events.py", line 719, in run_until_complete
| return future.result()
| ~~~~~~~~~~~~~^^
| File "/home/sk/src/cpython/Tools/jit/_targets.py", line 196, in _build_stencils
| async with asyncio.TaskGroup() as group:
| ~~~~~~~~~~~~~~~~~^^
| File "/usr/local/lib/python3.15/asyncio/taskgroups.py", line 72, in __aexit__
| return await self._aexit(et, exc)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
| File "/usr/local/lib/python3.15/asyncio/taskgroups.py", line 174, in _aexit
| raise BaseExceptionGroup(
| ...<2 lines>...
| ) from None
| ExceptionGroup: unhandled errors in a TaskGroup (2 sub-exceptions)
+-+---------------- 1 ----------------
| Traceback (most recent call last):
| File "/home/sk/src/cpython/Tools/jit/_targets.py", line 178, in _compile
| await _llvm.run("clang", args_s, echo=self.verbose)
| File "/home/sk/src/cpython/Tools/jit/_llvm.py", line 107, in run
| raise RuntimeError(f"Can't find {tool}-{_LLVM_VERSION}!")
| RuntimeError: Can't find clang-19!
+---------------- 2 ----------------
| Traceback (most recent call last):
| File "/home/sk/src/cpython/Tools/jit/_targets.py", line 178, in _compile
| await _llvm.run("clang", args_s, echo=self.verbose)
| File "/home/sk/src/cpython/Tools/jit/_llvm.py", line 107, in run
| raise RuntimeError(f"Can't find {tool}-{_LLVM_VERSION}!")
| RuntimeError: Can't find clang-19!
+------------------------------------
make: *** [Makefile:3284: jit_stencils.h] Error 1