20980ef56a
The old approach to determine the python executeable chooses the newest version from _Python_VERSIONS if no additonal versions are passed. With python it is possible to install different versions side-by-side. Therefore a user can install e.g. python 2.5 and 2.7. Python 2.7 maybe only installed for testing new features and 2.5 for building and running his software. Thus the default installation for the user would be python 2.5 and then returning PYTHON_EXECUTEABLE python2.7 would be wrong. The new approuch searches first for the the default python executable e.g. /usr/bin/python on unix and if it can't be found _Python_VERSIONS is used.
53 lines
2.0 KiB
CMake
53 lines
2.0 KiB
CMake
# - Find python interpreter
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# This module finds if Python interpreter is installed and determines where the
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# executables are. This code sets the following variables:
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#
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# PYTHONINTERP_FOUND - Was the Python executable found
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# PYTHON_EXECUTABLE - path to the Python interpreter
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# Python_ADDITIONAL_VERSIONS - list of additional Python versions to search for
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#
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#=============================================================================
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# Copyright 2005-2010 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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find_program(PYTHON_EXECUTABLE NAMES python)
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# Set up the versions we know about, in the order we will search. Always add
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# the user supplied additional versions to the front.
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set(_Python_VERSIONS
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${Python_ADDITIONAL_VERSIONS}
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2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.6 1.5)
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# Run first with the Python version in the executable
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if(NOT PYTHON_EXECUTABLE)
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foreach(_CURRENT_VERSION ${_Python_VERSIONS})
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set(_Python_NAMES python${_CURRENT_VERSION})
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if(WIN32)
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list(APPEND _Python_NAMES python)
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endif()
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find_program(PYTHON_EXECUTABLE
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NAMES ${_Python_NAMES}
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PATHS [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]
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)
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endforeach()
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endif()
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# handle the QUIETLY and REQUIRED arguments and set PYTHONINTERP_FOUND to TRUE if
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# all listed variables are TRUE
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonInterp DEFAULT_MSG PYTHON_EXECUTABLE)
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mark_as_advanced(PYTHON_EXECUTABLE)
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