问题
I am trying to create a target in my Makefile to automatically create a tags file using ctags.
I have a list of source files (.cpp files) but I don't have a list of all the header files (I use g++ -MM to create the list of header dependencies).
I would have assumed that ctags would follow any #include directives in the .cpp files when generating the tags, but it seems my assumption is wrong.
If I create a simple tags file like this:
ctags --fields=+iaS --extra=+q myClass.cpp
and then go into vim and type in the name of an object followed by a '.' I get the error "Pattern not found".
However, if I compile the tags file like this:
ctags --fields=+iaS --extra=+q myClass.cpp myClass.h
and do the same thing in vim I get a lovely auto-completed list of member variables/functions.
The first line in my 'myClass.cpp' file is
#include "myClass.h"
So why doesn't ctags use that to parse the header file too?
回答1:
nope. unfortunately/fortunately.
There wouldn't be too many problems following your own includes. The problem starts with
- conditional compilation
- external (system) libraries.
Fortunately, the problem for your own libraries is easily solved by doing something like
ctags *.h *.cpp
ctags -R src/
You could hack something together with cpp and then ctags. It would not work conveniently. A half-interesting approach would be to patch ctags to follow the #line pragma's in cpp's output and hence relate all tags to their respective sources.
However, that approach would not work as you'd expect for any preprocessor symbols/defines (macros have been expanded, so you wouldn't be able to find a macro by ctags).
The usual way to resolve this, is to generate a 'standard' tags file for your external libraries, and
:se tags+=/home/me/libs/tags.stdc++
:se tags+=/home/me/libs/tags.libsox
etc. Several libraries have tutorials on how to make a useful tags file for use with their libraries (or prebuilt tags files assuming a certain folder layout)
来源：https://stackoverflow.com/questions/7848911/can-ctags-be-made-to-follow-include-directives