[Qgis-developer] make broken when compiling trunk

[欧阳乐岩]

Under Archlinux, you have to force the use of python 2 with these options:
PYTHON_LIBRARY=/usr/lib/libpython2.7.so
PYTHON_EXECUTABLE=/usr/bin/python2
PYTHON_SITE_PACKAGES_DIR=/usr/lib/python2.7/site-packages
PYTHON_INCLUDE_PATH=/usr/include/python2.7/

If you compile for the first time, you may also get bitten by that bug: 
http://hub.qgis.org/issues/5620

Leyan