On macOS, extension library builds usually rely on the flag ``-undefined
dynamic_lookup`` to get the linker to temporarily accept missing CPython
API symbols. As the name implies, those symbols are then dynamically
resolved when Python imports such an extension library. Binaries
produced in this way are more portable since they don't contain a
hardcoded path to the CPython library. This is critical when
distributing binary wheels on PyPI, etc..

When targeting macOS>=12, XCode recently started to generate a somewhat
ominous warning:

``-undefined dynamic_lookup may not work with chained fixups``

For further detail on what chained fixups are, see the following
informative WWDC
https://developer.apple.com/videos/play/wwdc2022/110362/ (the relevant
part starts about 20mins into the video)

The message that the dynamic resolution functionality became broken.
I reported this to Apple via feedback request FB11767124.

Apple investigated the request and updated the behavior of ``ld``
starting with XCode 14.3b1+: it now disables the fixup chain linker
optimization whenever ``-undefined dynamic_lookup`` is specified. The
feedback from Apple also stated that the parameter
``-Wl,-no_fixup_chains`` should be specified on pre-14.3 XCode versions
to ensure correct behavior.

This commit realizes those changes by passing a flag to *always* disable
fixup chains. Related discussion is available in the CPython repository
(https://github.com/python/cpython/issues/97524).

Without this, it's impossible to get feature parity between detection
mechanisms. Both the pkg-config file and the cmake config set their
versions, but the python probe script didn't provide an option for this.

So you could print the compiler flags for using it, but you could not
check what you got.

This comment is unrelated to having T in tparam or not.
Probably a typo.
Copied the correct one here.

Resolve https://github.com/pybind/pybind11/issues/4518

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Background: https://github.com/pybind/pybind11/pull/4285#issuecomment-1435066554

```
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

pybind11/setup_helpers.py:177:13: B028 No explicit stacklevel keyword argument found. The warn method from the warnings module uses a stacklevel of 1 by default. This will only show a stack trace for the line on which the warn method is called. It is therefore recommended to use a stacklevel of 2 or greater to provide more information to the user.
            warnings.warn("You cannot safely change the cxx_level after setting it!")
            ^
```

* Revert "Go back to CMake 3.25.2 (#4496)"

This reverts commit b8f28551.

* Apply patch provided by @bradking (with pre-commit cmake-format auto fixes).

https://github.com/pybind/pybind11/pull/4503#issuecomment-1424768172

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* Always display python type information in cast errors

* Address comments

* Update comment

This reverts commit b2c1978c.

See #4500 for background.

updates:
- [github.com/PyCQA/pylint: v2.16.0 → v2.16.1](https://github.com/PyCQA/pylint/compare/v2.16.0...v2.16.1

)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

* Keep registered types until after Py_Finalize(). Fix #4459

* Address reviewer comments

Bumps [ilammy/msvc-dev-cmd](https://github.com/ilammy/msvc-dev-cmd) from 1.12.0 to 1.12.1.
- [Release notes](https://github.com/ilammy/msvc-dev-cmd/releases)
- [Commits](https://github.com/ilammy/msvc-dev-cmd/compare/v1.12.0...v1.12.1

)

---
updated-dependencies:
- dependency-name: ilammy/msvc-dev-cmd
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* Use PyConfig_InitPythonConfig instead of PyConfig_InitIsolatedConfig

* add unit test for default python configuration

---------

Co-authored-by: Daniel Jacobs <daniel.jacobs@is4s.com>

* Resolve flake8 error by replacing `pytest.raises(Exception)` with `SystemError`

* Also remove the obsolete comment.

* Tweak comment instead of removing it.

* Make sure to properly untrack gc objects before freeing them

* style: pre-commit fixes

* Fix lint

* Add comment about where the original track comes from

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* docs: update changelog for v2.10.3

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* chore: bump versions for 2.10.3

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* chore: fix make changelog script with entry is empty

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

updates:
- [github.com/asottile/pyupgrade: v3.3.0 → v3.3.1](https://github.com/asottile/pyupgrade/compare/v3.3.0...v3.3.1)
- [github.com/PyCQA/isort: 5.10.1 → 5.11.4](https://github.com/PyCQA/isort/compare/5.10.1...5.11.4)
- [github.com/psf/black: 22.10.0 → 22.12.0](https://github.com/psf/black/compare/22.10.0...22.12.0)
- [github.com/PyCQA/pylint: v2.15.8 → v2.15.9](https://github.com/PyCQA/pylint/compare/v2.15.8...v2.15.9)
- [github.com/shellcheck-py/shellcheck-py: v0.8.0.4 → v0.9.0.2](https://github.com/shellcheck-py/shellcheck-py/compare/v0.8.0.4...v0.9.0.2)
- [github.com/pre-commit/mirrors-clang-format: v15.0.4 → v15.0.6](https://github.com/pre-commit/mirrors-clang-format/compare/v15.0.4...v15.0.6

)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

* fix incorrect variable check

* remove duplicated check

* remove unneeded const cast

* Remove clang 10 C++20 (it broke recently), add clang 15 C++20 while we are at it.

* No luck trying clang15: Error response from daemon: manifest for silkeh/clang:15 not found: manifest unknown: manifest unknown. Giving up, this needs to be a separate PR.

* Fix `detail::obj_class_name()` to work correctly for meta classes.

* Adjust expected name for PyPy

* First

* Fixs

* Improve

* Additional assertions comment

* Improve docs

* chore: update clang-tidy to 15

* Add git

* Add NOLINTNEXTLINE for assignment in if

* Update CONTRIBUTING.md

* Add NOLINTNEXTLINE where needed

* Add one more NOLINTNEXTLINE

* stl_bind: make more readable

* Another missing NOLINTNEXTLINE

* Match style elsewhere

* Apply reviewer suggestion. Mark false positive

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* docs: changelog for next version

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* docs: address feedback

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* First

* Fix centos 7 again :(

* Fix minor nits

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* IPO/LTO support for ICX (IntelLLVM) compiler

https://github.com/pybind/pybind11/issues/4080



* style: pre-commit fixes

* Add WARNING/HELP WANTED comment.

Co-authored-by: Martin Blanchard <martin.blanchard@siemens.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Ralf W. Grosse-Kunstleve <rwgk@google.com>

* Revert "Systematically add `-DCMAKE_VERBOSE_MAKEFILE=ON` to obtain full command lines related to `-Wodr` (#4398)"

This reverts commit ff42f525.

* Set `env: VERBOSE: 1` as suggested by @henryiii

* Set `env: VERBOSE: 1` also in all other .yml files using cmake

Allow CMake find_package() from multiple directories.

https://github.com/pybind/pybind11/issues/4400



Co-authored-by: Martin Blanchard <martin.blanchard@siemens.com>