[BUG]: CMAKE pybind11 tries to find Python even if it has already been found with find_package() (and finds the wrong version) (Windows 10)

Required prerequisites

• Make sure you've read the documentation. Your issue may be addressed there.
• Search the issue tracker and Discussions to verify that this hasn't already been reported. +1 or comment there if it has.
• Consider asking first in the Gitter chat room or in a Discussion.

What version (or hash if on master) of pybind11 are you using?

65370f330ea9349bd9e996028b4cb7adfde37660

Problem description

Hello,

I am using pybind in a project and I am having an error when I try to configure the project using CMake.

I use find_package with the required version of python before adding the pybind directory (as recommanded in the documentation here and I am getting this error when configuring the CMake project :

CMake Error at C:/Program Files/CMake/share/cmake-3.29/Modules/FindPackageHandleStandardArgs.cmake:230 (message):                                                                                             Could NOT find PythonInterp: Found unsuitable version "3.10.5", but                                                                                                                                         required is at least "3.12" (found C:/Python/3105/python.exe)                                                                                                                                             Call Stack (most recent call first):                                                                                                                                                                          C:/Program Files/CMake/share/cmake-3.29/Modules/FindPackageHandleStandardArgs.cmake:598 (_FPHSA_FAILURE_MESSAGE)                                                                                            C:/Program Files/CMake/share/cmake-3.29/Modules/FindPythonInterp.cmake:182 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)                                                                                              pybind11/tools/FindPythonLibsNew.cmake:114 (find_package)                                                                                                                                                   pybind11/tools/pybind11Tools.cmake:50 (find_package)                                                                                                                                                        pybind11/tools/pybind11Common.cmake:192 (include)                                                                                                                                                           pybind11/CMakeLists.txt:237 (include)

And just before the error, Python 3.12 is found :

-- Found Python3: C:/Python/3123/python.exe (found suitable version "3.12.3", minimum required is "3.12") found components: Interpreter Development Development.Module Development.Embed

Reproducible example code

// Cmd
cmake -S . -B build -DPYTHON_VERSION="3.12"

// CMakeLists.txt
...
# Python
find_package(Python3 ${PYTHON_VERSION} COMPONENTS Interpreter Development REQUIRED)

if(NOT ${Python_FOUND})
    message(FATAL_ERROR "Python can't be found, exiting CMake")
endif()

set(PYBIND11_PYTHON_VERSION ${PYTHON_VERSION})
set(PYBIND11_FINDPYTHON OFF)

# Pybind
add_subdirectory(pybind11 CONFIG)
...

Is this a regression? Put the last known working version here if it is.

Not a regression

Start with the reported CMake stack in pybind11/tools/FindPythonLibsNew.cmake, pybind11/tools/pybind11Tools.cmake, and pybind11/tools/pybind11Common.cmake. Reproduce the configuration from the example CMakeLists.txt on Windows with Python 3.12 and CMake 3.29, then verify that the existing Python selection is respected without the unsuitable-version error.