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gzip.exe as symlink breaks NTEmacs's jka-compr.el
- From: Matt Swift <swift at alum dot mit dot edu>
- To: cygwin at cygwin dot com
- Date: Mon, 15 Jul 2002 01:36:31 -0400
- Subject: gzip.exe as symlink breaks NTEmacs's jka-compr.el
Cygwin package gzip 1.3.3 made the change (from 1.3.2) that /bin/gzip
is a symlink to /bin/gunzip instead of the other way around. This
change breaks NTEmacs 20.7 and 21.1 on Win2k. To reproduce, try
(call-process "gzip" nil '(t t) nil "--version")
and Emacs will either freeze until you issue multiple C-g's or Win2k
will popup an "illegal instruction" error dialog.
The common and useful package jka-compr.el (when loaded) by default
invokes `call-process' on "gzip" to uncompress as well as compress
files, rather than "gunzip".
You get similar errors if you invoke `call-process' on any of the
symlinks in /cygwin/bin (e.g., awk.exe -> gawk.exe).
cp /bin/gunzip.exe /usr/local/bin/gzip.exe
(assuming /usr/local/bin is in the PATH (NTEmacs's `exec-path' before
/bin). Could also change a jka-compr variable to use "gunzip" instead
of "gzip", but that seems less robust (other Emacs-Lisp code probably
calls "gzip" too).
I wasted more than an hour tracking down this bug (not a bug in Cygwin
per se, really, but a change that caused a bug with software very
commonly used with Cygwin). I didn't look hard, but I found no
comment in the gzip 1.3.3 sources indicating why the change was made
in the symlinks. Please don't change things that are not broken!
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