问题
When I type ctags -e it returns an error saying it doesn't know that command line option. I thought it should know about exuberant tags because etags works on cli.
Also, I recieve the following error: ctags: unrecognized option --langdef=arc and I have the following in my ~/.ctags file:
--langdef=arc
--langmap=arc:.arc
--regex-arc=/^\(def ([a-zA-Z1-9_*\/<>-]+)/\1/
--regex-arc=/^\(= ([a-zA-Z1-9_*\/<>-]+)/\1/
--regex-scheme=/^\(xdef ([a-zA-Z1-9_*\/<>-]+)/\1/
回答1:
etags is short for "Emacs tags", not "exuberant ctags". It sounds like you have Emacs' etags command installed, not exuberant-ctags'.
回答2:
It turns out that my system has basic ctags installed, but not exuberant-ctags. so even though some etags command existed, exuberant-ctags is still different in some way or another.
sudo apt-get install ctags fixed the problem
回答3:
sudo apt-get install exuberant-ctags
solved the problem for me. I was running Debian Jessie on an ARM development board, cubietruck.
回答4:
On windows, Emacs comes with etags and a similar executable file called ctags. In the emacs distribution, etags.exe = ctags.exe in the bin directory. You should download Exuberant Ctags from http://ctags.sourceforge.net/ Only exuberant ctags recognize -e option.
来源：https://stackoverflow.com/questions/2580313/ctags-doesnt-understand-e-option-no-exuberant-tags-option