I could use
M-x find-function to find the source code of some elisp functions if the function is not written in C code.
But since I am using a Debian binary package of Emacs , some of the source code is omitted and only the byte-compiled
.elc files preserved. So is there any way to get the source code and attach them with those elc files? Can I use
apt-get source emacs and associate with the src (C code as well) with the byte-compiled one. Or do I have to build Emacs from source code?