Variable: c-opt-cpp-start
c-opt-cpp-start is a buffer-local variable defined in cc-engine.el.gz.
Documentation
Regexp matching the prefix of a cpp directive including the directive name, or nil in languages without preprocessor support. The first submatch surrounds the directive name.
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/cc-engine.el.gz
(c-declare-lang-variables)