[CMake] CMake finds the wrong Python interpreter on Windows

[Bill Hoffman]

David Cole wrote:

> 
> Same problem as ever: when multiple versions are installed an automatic 
> "find" result cannot be relied upon to choose the right one. In that 
> case, caller should set PYTHON_EXECUTABLE explicitly prior to doing the 
> find call.
> 
> On the other hand, we should not have a version/path mismatch between 
> python exes and libs and headers. We should consistently find one first, 
> and then find the other stuff relative to that. Or leave that other 
> stuff set as NOTFOUND if there are no libs/headers relative to the exe.
> 
> This should be as easy as changing which Qt is found: change 
> QT_QMAKE_EXECUTABLE and other stuff gets re-found. Same logic should 
> apply here: change PYTHON_EXECUTABLE and other stuff should be re-found...
> 
I guess what I was getting at was that on windows I don't think other 
than cygwin the version number is put into the .exe name.  So, we might 
not want to look for version number names on windows for python.


-Bill