added backend options to CFLAGS fixed bug with mode=debug
added backend options to CFLAGS
fixed bug with mode=debug

--HG--
extra : convert_revision : svn%3A83215879-3e5a-4751-8c9d-778f44bb06a5/trunk%40648

jbrownbridge/thrust,jbrownbridge/thrust,jbrownbridge/thrust,jbrownbridge/thrust