emacs-21.2 compile.el - error tracking remote directory entry/exit

[Kevin Broadey <kevin.broadey@motorola.com>]

In GNU Emacs 21.2.1 (sparc-sun-solaris2.7, X toolkit)
 of 2002-06-20 on bah128
configured using `configure  --prefix=/tools.local/emacs-21.2 --exec-prefix=/tools.local/emacs-21.2/SunOS --with-x-toolkit=lucid'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: nil

`compilation-parse-errors' goes to some lengths to modify the filename
in an error message (prepending `comint-file-name-prefix', calling
`compilation-parse-errors-filename-function' etc) to compensate for
the compilation process being in a different execution environment to
the Emacs process, but it doesn't do the same when parsing the
"Entering/Leaving directory" location-tracking messages output by GNU
make.  This causes `compilation-directory-stack' to contain incorrect
information.

Fix this by assuming the tracking directory name is correct - the
error filename compensation code then has better information to work
from and is more likely to get it right.

Proper fix is probably to apply the same sort of compensation rules to
the tracking directory name, but that looks like a big job and this
5-minute hack works for me!

Here's the patch:-

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end