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ETAGS

tag 생성
$ find . -name '*.[csSh]' | etags -
$ find . -name '*.cc' -or -name '*.h' | etags -

M-. TAG        Find first definition of TAG (`find-tag').
M-*            Pop back to where you previously invoked `M-.' and friends.
C-u M-.        Find next alternate definition of last tag specified.
C-u - M-.      Go back to previous tag found.
C-M-. PATTERN  Find a tag whose name matches PATTERN (`find-tag-regexp').
C-u C-M-.      Find the next tag whose name matches the last pattern used.
C-x 4 . TAG    Find first definition of TAG, but display it in another window (`find-tag-other-window').
C-x 5 . TAG    Find first definition of TAG, and create a new frame to select the buffer (`find-tag-other-frame').



CSCOPE

cscope download : http://cscope.sourceforge.net/
emacs el package load : (require ‘xcscope)
xcscope.el : /usr/share/emacs/site-lisp
Database 생성 : cscope-index-files

C-c s s     Find symbol.
C-c s d     Find global definition.
C-c s g     Find global definition (alternate binding).
C-c s G     Find global definition without prompting.
C-c s c     Find functions calling a function.
C-c s C     Find called functions (list functions called from a function).
C-c s t     Find text string.
C-c s e     Find egrep pattern.
C-c s f     Find a file.
C-c s i     Find files #including a file.