CMake uses Python 3 instead of Python 2 when both are available

[jsternberg]

CMake is stupid. I'll take care of this one at some point. This affects Linux Mint 14 (nadia). Problem area is in bold.

jsternberg@jsternberg-laptop ~/tortuga/build $ cmake ..
-- The C compiler identification is GNU 4.7.2
-- The CXX compiler identification is GNU 4.7.2
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Boost version: 1.45.0
-- Found the following Boost libraries:
-- system
-- filesystem
-- date_time
-- program_options
-- python
-- regex
-- serialization
-- signals
-- thread
-- Found Log4CPP
-- Found PythonLibs: /usr/lib/libpython2.7.so (found version "2.7.3")
-- Found UnitTest++
-- Found wxWidgets: TRUE
-- Found FANN: /usr/lib/libfann.so
-- Found FLOATFANN: /usr/lib/libfloatfann.so
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
-- Found X11: /usr/lib/x86_64-linux-gnu/libX11.so
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libGL.so
-- Features: pattern,drivers,core,math,vehicle,estimation,control,vision,network,logging,wrappers,sonar,vision_tools,vision_viewer,plot
-- Features header file generated
-- Found PythonInterp: /usr/bin/python (found version "2.7.3")
-- Found USB: /usr/lib/x86_64-linux-gnu/libusb.so
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jsternberg/tortuga/build
jsternberg@jsternberg-laptop ~/tortuga/build $ rm -rf *
jsternberg@jsternberg-laptop ~/tortuga/build $ sudo apt-get install libpython3.2Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
libpython3.2
0 upgraded, 1 newly installed, 0 to remove and 9 not upgraded.
Need to get 1,319 kB of archives.
After this operation, 3,416 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu/ quantal-updates/main libpython3.2 amd64 3.2.3-6ubuntu3.1 [1,319 kB]
Fetched 1,319 kB in 1s (1,116 kB/s)
Selecting previously unselected package libpython3.2.
(Reading database ... 170331 files and directories currently installed.)
Unpacking libpython3.2 (from .../libpython3.2_3.2.3-6ubuntu3.1_amd64.deb) ...
Setting up libpython3.2 (3.2.3-6ubuntu3.1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
jsternberg@jsternberg-laptop ~/tortuga/build $ cmake ..
-- The C compiler identification is GNU 4.7.2
-- The CXX compiler identification is GNU 4.7.2
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Boost version: 1.45.0
-- Found the following Boost libraries:
-- system
-- filesystem
-- date_time
-- program_options
-- python
-- regex
-- serialization
-- signals
-- thread
-- Found Log4CPP
-- Found PythonLibs: /usr/lib/python3.2/config/libpython3.2.so (found version "2.7.3")
-- Found UnitTest++
-- Found wxWidgets: TRUE
-- Found FANN: /usr/lib/libfann.so
-- Found FLOATFANN: /usr/lib/libfloatfann.so
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
-- Found X11: /usr/lib/x86_64-linux-gnu/libX11.so
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libGL.so
-- Features: pattern,drivers,core,math,vehicle,estimation,control,vision,network,logging,wrappers,sonar,vision_tools,vision_viewer,plot
-- Features header file generated
-- Found PythonInterp: /usr/bin/python (found version "2.7.3")
-- Found USB: /usr/lib/x86_64-linux-gnu/libusb.so
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jsternberg/tortuga/build