grep-hit-face)
(set (make-local-variable 'compilation-error-regexp-alist)
grep-regexp-alist)
+ ;; compilation-directory-matcher can't be nil, so we set it to a regexp that
+ ;; can never match.
+ (set (make-local-variable 'compilation-directory-matcher) '("\\`a\\`"))
(set (make-local-variable 'compilation-process-setup-function)
'grep-process-setup)
(set (make-local-variable 'compilation-disable-input) t)