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fix(cmake): correctly detect FindPython policy and better warning (#4806)

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Henry Schreiner 2023-09-15 17:59:30 -04:00 committed by GitHub
parent d06d53694a
commit 4fb111bd78
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2 changed files with 26 additions and 0 deletions
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10
CMakeLists.txt
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@ -5,6 +5,11 @@
# All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.
# Propagate this policy (FindPythonInterp removal) so it can be detected later
if(NOT CMAKE_VERSION VERSION_LESS "3.27")
cmake_policy(GET CMP0148 _pybind11_cmp0148)
endif()
cmake_minimum_required(VERSION 3.5)
# The `cmake_minimum_required(VERSION 3.5...3.26)` syntax does not work with
@ -16,6 +21,11 @@ else()
cmake_policy(VERSION 3.26)
endif()
if(_pybind11_cmp0148)
cmake_policy(SET CMP0148 ${_pybind11_cmp0148})
unset(_pybind11_cmp0148)
endif()
# Avoid infinite recursion if tests include this as a subdirectory
if(DEFINED PYBIND11_MASTER_PROJECT)
return()

16
tools/FindPythonLibsNew.cmake
View File

@ -95,6 +95,22 @@ if(NOT PythonLibsNew_FIND_VERSION)
set(PythonLibsNew_FIND_VERSION "3.6")
endif()
if(NOT CMAKE_VERSION VERSION_LESS "3.27")
cmake_policy(GET CMP0148 _pybind11_cmp0148)
if(NOT _pybind11_cmp0148)
message(
AUTHOR_WARNING
"Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs "
"modules are removed. Run \"cmake --help-policy CMP0148\" for policy "
"details. Use the cmake_policy command to set the policy and suppress "
"this warning, or preferably upgrade to using FindPython, either by "
"calling it explicitly before pybind11, or by setting "
"PYBIND11_FINDPYTHON ON before pybind11.")
endif()
cmake_policy(SET CMP0148 OLD)
unset(_pybind11_cmp0148)
endif()
find_package(PythonInterp ${PythonLibsNew_FIND_VERSION} ${_pythonlibs_required}
${_pythonlibs_quiet})