>> I thought using FindPythonInterp would be more portable than
>> simply invoking "python" directly (i.e. using $PYTHON_EXECUTABLE).
> In case you want the newest version of any Python major, as in your
> case, try
> find_package(PythonInterp 2 REQUIRED). But you are right, this would
> also successfully return you a 2.5.
Or, if you want to prefer the python in the environment PATH, and then
do your own version check to make sure it's suitable, use something
like this:
# http://www.cmake.org/cmake/help/v3.0/command/find_program.html
find_program(PYTHON_EXECUTABLE python
PATHS ENV PATH # look in the PATH environment variable
NO_DEFAULT_PATH # do not look anywhere else...
)
find_package(PythonInterp)
And then after the find_package, you can do your own version check with
the variables:
PYTHON_VERSION_MAJOR='2'
PYTHON_VERSION_MINOR='7'
PYTHON_VERSION_PATCH='6'
PYTHON_VERSION_STRING='2.7.6'
and the VERSION_GREATER / VERSION_LESS arguments to the "if" command.
HTH,
David C.
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