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OpenCVDetectPython.cmake: prefer using FindPython #1133

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OpenCVDetectPython.cmake: prefer using FindPython #1133

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64 changes: 45 additions & 19 deletions cmake/modules/OpenCVDetectPython.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -29,29 +29,55 @@ function(find_python preferred_version min_version library_env include_dir_env
if(NOT ${found})
if(${executable})
set(PYTHON_EXECUTABLE "${${executable}}")
set(Python_EXECUTABLE "${${executable}}")
endif()

find_package(PythonInterp "${preferred_version}")
if(NOT PYTHONINTERP_FOUND)
find_package(PythonInterp "${min_version}")
endif()
if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.12")
find_package(Python "${preferred_version}" COMPONENTS Interpreter)
if(NOT Python_Interpreter_FOUND)
find_package(Python "${min_version}" COMPONENTS Interpreter)
endif()

if(PYTHONINTERP_FOUND)
# Copy outputs
set(_found ${PYTHONINTERP_FOUND})
set(_executable ${PYTHON_EXECUTABLE})
set(_version_string ${PYTHON_VERSION_STRING})
set(_version_major ${PYTHON_VERSION_MAJOR})
set(_version_minor ${PYTHON_VERSION_MINOR})
set(_version_patch ${PYTHON_VERSION_PATCH})
if(Python_Interpreter_FOUND)
# Copy outputs
set(_found ${Python_Interpreter_FOUND})
set(_executable ${Python_EXECUTABLE})
set(_version_string ${Python_VERSION})
set(_version_major ${Python_VERSION_MAJOR})
set(_version_minor ${Python_VERSION_MINOR})
set(_version_patch ${Python_VERSION_PATCH})

# Clear find_host_package side effects
unset(PYTHONINTERP_FOUND)
unset(PYTHON_EXECUTABLE CACHE)
unset(PYTHON_VERSION_STRING)
unset(PYTHON_VERSION_MAJOR)
unset(PYTHON_VERSION_MINOR)
unset(PYTHON_VERSION_PATCH)
# Clear find_host_package side effects
unset(Python_Interpreter_FOUND)
unset(Python_EXECUTABLE CACHE)
unset(Python_VERSION)
unset(Python_VERSION_MAJOR)
unset(Python_VERSION_MINOR)
unset(Python_VERSION_PATCH)
endif()
else()
find_package(PythonInterp "${preferred_version}")
if(NOT PYTHONINTERP_FOUND)
find_package(PythonInterp "${min_version}")
endif()

if(PYTHONINTERP_FOUND)
# Copy outputs
set(_found ${PYTHONINTERP_FOUND})
set(_executable ${PYTHON_EXECUTABLE})
set(_version_string ${PYTHON_VERSION_STRING})
set(_version_major ${PYTHON_VERSION_MAJOR})
set(_version_minor ${PYTHON_VERSION_MINOR})
set(_version_patch ${PYTHON_VERSION_PATCH})

# Clear find_host_package side effects
unset(PYTHONINTERP_FOUND)
unset(PYTHON_EXECUTABLE CACHE)
unset(PYTHON_VERSION_STRING)
unset(PYTHON_VERSION_MAJOR)
unset(PYTHON_VERSION_MINOR)
unset(PYTHON_VERSION_PATCH)
endif()
endif()

if(_found)
Expand Down