ctags -f ~/.vim/qt4tags -R /usr/include/qt4/
ou si on a pas de .ctags
ctags -R --sort=yes --c++-kinds=+p --fields=+iaS --extra=+q --language-force=C++ -f gl /usr/include/GL/   # for OpenGL
ctags -R --sort=yes --c++-kinds=+p --fields=+iaS --extra=+q --language-force=C++ -f sdl /usr/include/SDL/ # for SDL
ctags -R --sort=yes --c++-kinds=+p --fields=+iaS --extra=+q --language-force=C++ -f qt4 /usr/include/qt4/ # for QT4

in .vimrc
set tags+=~/vim/qt4tags

" configure tags - add additional tags here or comment out not-used ones
set tags+=~/.vim/tags/gl
set tags+=~/.vim/tags/sdl
set tags+=~/.vim/tags/qt4