gh-130931: Add pycore_interpframe.h internal header

[vstinner]

Move _PyInterpreterFrame and associated functions to a new pycore_interpframe.h header.

• Issue: Cython cannot use "pycore_frame.h" in Py3.14a4 #130931

[vstinner]

This PR now needs #131396. I rebased this PR on top of PR gh-131396 and marked it as a draft to wait until PR gh-131396 is merged.

[vstinner]

@markshannon: Are you ok with this trade-off to unblock Cython for now?

[vstinner]

@markshannon: Are you ok with this trade-off to unblock Cython for now?

See @markshannon's comment on the issue: #130931 (comment)

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Debian root 3.x (tier-1) has failed when building commit 5c44d7d.

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/#/builders/345/builds/10633) and take a look at the build logs.
4. Check if the failure is related to this commit (5c44d7d) 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/#/builders/345/builds/10633

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

Click to see traceback logs

remote: Enumerating objects: 34, done.        
remote: Counting objects:   2% (1/34)        
remote: Counting objects:   5% (2/34)        
remote: Counting objects:   8% (3/34)        
remote: Counting objects:  11% (4/34)        
remote: Counting objects:  14% (5/34)        
remote: Counting objects:  17% (6/34)        
remote: Counting objects:  20% (7/34)        
remote: Counting objects:  23% (8/34)        
remote: Counting objects:  26% (9/34)        
remote: Counting objects:  29% (10/34)        
remote: Counting objects:  32% (11/34)        
remote: Counting objects:  35% (12/34)        
remote: Counting objects:  38% (13/34)        
remote: Counting objects:  41% (14/34)        
remote: Counting objects:  44% (15/34)        
remote: Counting objects:  47% (16/34)        
remote: Counting objects:  50% (17/34)        
remote: Counting objects:  52% (18/34)        
remote: Counting objects:  55% (19/34)        
remote: Counting objects:  58% (20/34)        
remote: Counting objects:  61% (21/34)        
remote: Counting objects:  64% (22/34)        
remote: Counting objects:  67% (23/34)        
remote: Counting objects:  70% (24/34)        
remote: Counting objects:  73% (25/34)        
remote: Counting objects:  76% (26/34)        
remote: Counting objects:  79% (27/34)        
remote: Counting objects:  82% (28/34)        
remote: Counting objects:  85% (29/34)        
remote: Counting objects:  88% (30/34)        
remote: Counting objects:  91% (31/34)        
remote: Counting objects:  94% (32/34)        
remote: Counting objects:  97% (33/34)        
remote: Counting objects: 100% (34/34)        
remote: Counting objects: 100% (34/34), done.        
remote: Compressing objects:   6% (1/15)        
remote: Compressing objects:  13% (2/15)        
remote: Compressing objects:  20% (3/15)        
remote: Compressing objects:  26% (4/15)        
remote: Compressing objects:  33% (5/15)        
remote: Compressing objects:  40% (6/15)        
remote: Compressing objects:  46% (7/15)        
remote: Compressing objects:  53% (8/15)        
remote: Compressing objects:  60% (9/15)        
remote: Compressing objects:  66% (10/15)        
remote: Compressing objects:  73% (11/15)        
remote: Compressing objects:  80% (12/15)        
remote: Compressing objects:  86% (13/15)        
remote: Compressing objects:  93% (14/15)        
remote: Compressing objects: 100% (15/15)        
remote: Compressing objects: 100% (15/15), done.        
remote: Total 18 (delta 16), reused 4 (delta 3), pack-reused 0 (from 0)        
From https://github.com/python/cpython
 * branch                    main       -> FETCH_HEAD
Note: switching to '5c44d7d99c470b4270b2f0e4841cf5a7f2499e15'.

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 5c44d7d99c4 gh-130931: Add pycore_interpframe.h internal header (#131249)
Switched to and reset branch 'main'

configure: WARNING: no system libmpdecimal found; falling back to bundled libmpdecimal (deprecated and scheduled for removal in Python 3.15)
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.

find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
make: [Makefile:3213: clean-retain-profile] Error 1 (ignored)

[colesbury]

Would you please add this to PYTHON_HEADERS in Makefile.pre.in?

[vstinner]

Would you please add this to PYTHON_HEADERS in Makefile.pre.in?

Oops, I was sure that I did! I wrote #131545 to add it to PYTHON_HEADERS.