bug#8895: 24.0.50; Entering Directory matching no longer works in grep-mode

[Chong Yidong]

Vagn Johansen <vagn.johansen@gmail.com> writes:

> Yes, sort of . I call (grep COMMAND-ARGS) with an external program
> (written by me) which write the "Entering directory" message.

In that case, you should use grep-mode-hook to set
compilation-directory-matcher accordingly.  For us to cater to
non-standard grep programs is a path to madness.