make regen-all now suggests running: make autoconf

[vstinner]

"make autoconf" also runs autoheader, whereas "autoconf" does not.

[vstinner]

cc @tiran

[tiran]

make autoconf is broken. It should call autoreconf -i or better autoreconf -ivf -Werror

[vstinner]

make autoconf is broken. It should call autoreconf -i or better autoreconf -ivf -Werror

Would you mind to change this in a separed PR? This PR remains correct, no? "make autoconf" is better than just running "autoconf", no?

[tiran]

IMHO it would make more sense to remove make autoconf. Users need a very specific version of autoconf plus a specific snapshot of autoarchive plus the right version of pkg-conf's M4 macro file. Otherwise our CI will refuse the commit.

[vstinner]

I don't understand how to do that in practice. Currently, the devguide suggests to run the autoreconf -i command and doesn't provide any version number:
https://devguide.python.org/setup/#regenerate-configure

[vstinner]

I never recall how to regenerated files generated by configure.ac. IMO running make autoconf is better than running autoconf && autoheader, at least, it's shorter to type :-D

If make autoconf could be enhanced, I would prefer to enhance it rather removing it. I don't feel comfortable to touch it since I don't know what autoreconf -ivf -Werror does. Is it supported by all platforms supported by Python?

FYI a few days ago, I modified configure.ac and I ran autoconf && autoheader. It just worked on my Fedora 35: GH-30556. It wasn't blocked by the CI.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Clang 3.x has failed when building commit 1319408.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/3/builds/1385) and take a look at the build logs.
4. Check if the failure is related to this commit (1319408) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/3/builds/1385

Failed tests:

• test_json
• test_lib2to3

Summary of the results of the build (if available):

==

Click to see traceback logs

remote: Enumerating objects: 8, done.        
remote: Counting objects:  12% (1/8)        
remote: Counting objects:  25% (2/8)        
remote: Counting objects:  37% (3/8)        
remote: Counting objects:  50% (4/8)        
remote: Counting objects:  62% (5/8)        
remote: Counting objects:  75% (6/8)        
remote: Counting objects:  87% (7/8)        
remote: Counting objects: 100% (8/8)        
remote: Counting objects: 100% (8/8), done.        
remote: Compressing objects:  14% (1/7)        
remote: Compressing objects:  28% (2/7)        
remote: Compressing objects:  42% (3/7)        
remote: Compressing objects:  57% (4/7)        
remote: Compressing objects:  71% (5/7)        
remote: Compressing objects:  85% (6/7)        
remote: Compressing objects: 100% (7/7)        
remote: Compressing objects: 100% (7/7), done.        
remote: Total 8 (delta 2), reused 3 (delta 1), pack-reused 0        
From https://github.com/python/cpython
 * branch                  main       -> FETCH_HEAD
Note: switching to '13194084b40fe6579a70248b7be0665ff4f08374'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 13194084b4 make regen-all now suggests running: make autoconf (GH-30893)
Switched to and reset branch 'main'

Python/pytime.c:297:10: warning: implicit conversion from 'long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Wimplicit-const-int-float-conversion]
    if (!_Py_InIntegralTypeRange(time_t, intpart)) {
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:85:45: note: expanded from macro '_Py_InIntegralTypeRange'
    (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))
                                         ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:74:94: note: expanded from macro '_Py_IntegralTypeMax'
    ((_Py_IntegralTypeSigned(type)) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
Python/pytime.c:352:14: warning: implicit conversion from 'long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Wimplicit-const-int-float-conversion]
        if (!_Py_InIntegralTypeRange(time_t, intpart)) {
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:85:45: note: expanded from macro '_Py_InIntegralTypeRange'
    (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))
                                         ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:74:94: note: expanded from macro '_Py_IntegralTypeMax'
    ((_Py_IntegralTypeSigned(type)) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
Python/pytime.c:507:10: warning: implicit conversion from 'long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Wimplicit-const-int-float-conversion]
    if (!_Py_InIntegralTypeRange(_PyTime_t, d)) {
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:85:45: note: expanded from macro '_Py_InIntegralTypeRange'
    (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))
                                         ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:74:94: note: expanded from macro '_Py_IntegralTypeMax'
    ((_Py_IntegralTypeSigned(type)) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
3 warnings generated.
./Modules/_threadmodule.c:1648:26: warning: implicit conversion from '_PyTime_t' (aka 'long') to 'double' changes value from 9223372036854775 to 9223372036854776 [-Wimplicit-const-int-float-conversion]
    double timeout_max = (_PyTime_t)PY_TIMEOUT_MAX * 1e-6;
                         ^~~~~~~~~~~~~~~~~~~~~~~~~ ~
1 warning generated.
renaming build/scripts-3.11/pydoc3 to build/scripts-3.11/pydoc3.11
renaming build/scripts-3.11/idle3 to build/scripts-3.11/idle3.11
renaming build/scripts-3.11/2to3 to build/scripts-3.11/2to3-3.11

renaming build/scripts-3.11/pydoc3 to build/scripts-3.11/pydoc3.11
renaming build/scripts-3.11/idle3 to build/scripts-3.11/idle3.11
renaming build/scripts-3.11/2to3 to build/scripts-3.11/2to3-3.11

renaming build/scripts-3.11/pydoc3 to build/scripts-3.11/pydoc3.11
renaming build/scripts-3.11/idle3 to build/scripts-3.11/idle3.11
renaming build/scripts-3.11/2to3 to build/scripts-3.11/2to3-3.11
/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang/build/Lib/unittest/loader.py:328: DeprecationWarning: lib2to3 package is deprecated and may not be able to parse Python 3.10+
  __import__(name)
Fatal Python error: Segmentation fault

Current thread 0x000003ff9d576710 (most recent call first):
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  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang/build/Lib/lib2to3/pytree.py", line 786 in _recursive_matches
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang/build/Lib/lib2to3/pytree.py", line 786 in _recursive_matches
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang/build/Lib/lib2to3/pytree.py", line 786 in _recursive_matches
  ...

Extension modules: _testcapi (total: 1)
make: *** [Makefile:1779: buildbottest] Segmentation fault (core dumped)

Cannot open file '/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang/build/test-results.xml' for upload

[tiran]

make autoconf is broken. It kinda works by accident because the install files are already there:

# Regenerate the configure script from configure.ac using autoconf
(cd .; autoconf -Wall)
configure.ac:5699: warning: cannot check for file existence when cross compiling
../../lib/autoconf/general.m4:2788: AC_CHECK_FILE is expanded from...
configure.ac:5699: the top level
configure.ac:5704: warning: cannot check for file existence when cross compiling
../../lib/autoconf/general.m4:2788: AC_CHECK_FILE is expanded from...
configure.ac:5704: the top level
# Regenerate pyconfig.h.in from configure.ac using autoheader
(cd .; autoheader -Wall)