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FindPythonInterp: make version selectable 

This allows the developer to tell FindPythonInterp which Python version should
be searched for. This allows the right version to be chosen for a project
without user assistance if there are specific requirements. This is especially
useful as it is common to have major versions 2 and 3 installed in parallel,
which are partly incompatible.
This commit is contained in:
Rolf Eike Beer 2012-01-17 18:25:10 +01:00
parent b2838626dd
commit 0fe4d69b6f
1 changed files with 39 additions and 2 deletions
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41
Modules/FindPythonInterp.cmake
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@ -26,14 +26,51 @@
# (To distribute this file outside of CMake, substitute the full # (To distribute this file outside of CMake, substitute the full
# License text for the above reference.) # License text for the above reference.)
unset(_Python_NAMES)
set(_PYTHON1_VERSIONS 1.6 1.5)
set(_PYTHON2_VERSIONS 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0)
set(_PYTHON3_VERSIONS 3.3 3.2 3.1 3.0)
if(PythonInterp_FIND_VERSION)
if(PythonInterp_FIND_VERSION MATCHES "^[0-9]+\\.[0-9]+(\\.[0-9]+.*)?$")
string(REGEX REPLACE "^([0-9]+\\.[0-9]+).*" "\\1" _PYTHON_FIND_MAJ_MIN "${PythonInterp_FIND_VERSION}")
string(REGEX REPLACE "^([0-9]+).*" "\\1" _PYTHON_FIND_MAJ "${_PYTHON_FIND_MAJ_MIN}")
list(APPEND _Python_NAMES python${_PYTHON_FIND_MAJ_MIN} python${_PYTHON_FIND_MAJ})
unset(_PYTHON_FIND_OTHER_VERSIONS)
if(NOT PythonInterp_FIND_VERSION_EXACT)
foreach(_PYTHON_V ${_PYTHON${_PYTHON_FIND_MAJ}_VERSIONS})
if(NOT _PYTHON_V VERSION_LESS _PYTHON_FIND_MAJ_MIN)
list(APPEND _PYTHON_FIND_OTHER_VERSIONS ${_PYTHON_V})
endif()
endforeach()
endif(NOT PythonInterp_FIND_VERSION_EXACT)
unset(_PYTHON_FIND_MAJ_MIN)
unset(_PYTHON_FIND_MAJ)
else(PythonInterp_FIND_VERSION MATCHES "^[0-9]+\\.[0-9]+(\\.[0-9]+.*)?$")
list(APPEND _Python_NAMES python${PythonInterp_FIND_VERSION})
set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON${PythonInterp_FIND_VERSION}_VERSIONS})
endif(PythonInterp_FIND_VERSION MATCHES "^[0-9]+\\.[0-9]+(\\.[0-9]+.*)?$")
else(PythonInterp_FIND_VERSION)
set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON3_VERSIONS} ${_PYTHON2_VERSIONS} ${_PYTHON1_VERSIONS})
endif(PythonInterp_FIND_VERSION)
list(APPEND _Python_NAMES python)
# Search for the current active python version first # Search for the current active python version first
find_program(PYTHON_EXECUTABLE NAMES python) find_program(PYTHON_EXECUTABLE NAMES ${_Python_NAMES})
# Set up the versions we know about, in the order we will search. Always add # Set up the versions we know about, in the order we will search. Always add
# the user supplied additional versions to the front. # the user supplied additional versions to the front.
set(_Python_VERSIONS set(_Python_VERSIONS
${Python_ADDITIONAL_VERSIONS} ${Python_ADDITIONAL_VERSIONS}
2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.6 1.5) ${_PYTHON_FIND_OTHER_VERSIONS}
)
unset(_PYTHON_FIND_OTHER_VERSIONS)
unset(_PYTHON1_VERSIONS)
unset(_PYTHON2_VERSIONS)
unset(_PYTHON3_VERSIONS)
# Search for newest python version if python executable isn't found # Search for newest python version if python executable isn't found
if(NOT PYTHON_EXECUTABLE) if(NOT PYTHON_EXECUTABLE)