Mail Archives: cygwin/2008/12/16/09:31:12
On 12/15/2008 10:34 AM, Ken Brown wrote:
> On 12/15/2008 8:52 AM, Corinna Vinschen wrote:
>> On Dec 14 16:49, Ken Brown wrote:
>>> On 12/11/2008 2:30 PM, Matt Wozniski wrote:
>>>> On Thu, Dec 11, 2008 at 1:14 PM, Ken Brown wrote:
>>>>> One other thing I've noticed, which I think is unrelated, is that
>>>>> there is a
>>>>> glitch in directory listing in emacs under cygwin 1.7: If you try
>>>>> to list a
>>>>> directory with control-x d, very often the directory listing makes
>>>>> it look
>>>>> like the directory is empty when it isn't. Typing "g" (to ask
>>>>> emacs to
>>>>> redisplay the directory) usually results in a correct listing.
>>>>> [...]
>>>> With no knowledge of cygwin's internals, I'd much sooner guess the
>>>> changes to the pipe code...
>>> I should have just reported the symptom instead of trying to guess
>>> the cause: Emacs runs the shell command "ls -al" and thinks there's
>>> no output. Here's a second example. I used emacs's "ediff" function
>>> to compare two buffers, and it reported (incorrectly) that there were
>>> no differences. So it seems that emacs called on the shell to run
>>> "diff" but didn't get the output.
>>
>> Any chance to create a testcase which reproduces this behaviour without
>> involving emacs? Emacs is hell of a testcase which I won't even touch
>> with gloves...
>
> Unfortunately, I have virtually no programming experience. I was hoping
> the emacs maintainer might be able to help.
Here's one more piece of information, in case it means something to the
experts. I had been building emacs with the following patch, which was
given to me by the person who told me how to build emacs for cygwin:
--- strftime.c.orig 2007-01-14 04:24:37.000000000 +0100
+++ strftime.c 2008-02-04 21:40:01.031250000 +0100
@@ -54,7 +54,7 @@
# endif
#endif
#if HAVE_TZNAME
-#ifndef USE_CRT_DLL
+#if !defined (USE_CRT_DLL) && !defined (CYGWIN)
extern char *tzname[];
#endif
#endif
I just rebuilt emacs under cygwin 1.7 without that patch. The glitch
involving directory listings still occurs occasionally, but *much* less
often. It happens so much less often that I was about to send a message
saying the problem was solved, but then it happened again.
Two questions:
1. For the sake of my education, can someone explain to me what this
patch is all about and whether it ought to be necessary for cygwin?
(I'm compiling with gcc-4, if that makes a difference.)
2. Does the fact that my problem occurs less often without the patch
provide any clues?
Thanks.
Ken
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