How to find definition after jump to the third-party library file?

[zhongweiy]

Hi, there,

I have an issue: after jumped to a third party file (say a system include dir), how can I find further definition in that file?

the default emacs tags has this feature as described:

"For example, if you are working on a program that uses a library, you may wish to have the tags tables of both the program and the library available, so that Emacs could easily find identifiers from both." at https://www.gnu.org/software/emacs/manual/html_node/emacs/Select-Tags-Table.html.