How to make Emacs C source directory permanent?

Question

I\'m new to Emacs and I\'m just learning how to use it. I know how to set my \"Emacs C Source dir\" but I don\'t know how to make this change permanent. I guess I have to set it

Answer 1

Ordinarily most user-settable variables can be edited with Customize, but for some reason the source-directory variable isn't one of them.

You will need to edit your ~/.emacs file to include a line such as:

(setq source-directory "/path/to/emacs/source/dir")

Do not include the trailing src directory; it will be added automatically. Then exit and restart Emacs.

Note that setting this after Emacs is running may have no effect because it's only read when find-func.el is loaded. You can set find-function-C-source-directory instead (with the /src), but that can get overwritten. It's better just to (setq source-directory ...) at startup, as above.