I use full-ack: http://nschum.de/src/emacs/full-ack/ http://nschum.de/src/emacs/full-ack/ (which uses ack: http://betterthangrep.com/ http://betterthangrep.com/

I use full-ack: http://nschum.de/src/emacs/full-ack/ http://nschum.de/src/emacs/full-ack/ (which uses ack: http://betterthangrep.com/ http://betterthangrep.com/ underneath) I have it bound to C-c a and it works great. Finds all references in a multi-hundred thousand line C/C++ code base in a few seconds.