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Re: [OT?] rebasing cygwin, was: cygwin/xfree86/emacs problems after upgr

From: Al Williams
Subject: Re: [OT?] rebasing cygwin, was: cygwin/xfree86/emacs problems after upgrading
Date: 16 Feb 2004 17:24:41 -0800

Thomas L Roche <address@hidden> wrote in message news:<address@hidden>...
> Could you give me, or pass pointers to, a bit more information about
> rebase? I'm asking because I can't find much online, except

Well, actually it did not completely eliminate the problem although it
did reduce its frequency significantly (once or twice a day instead of
five or six times an hour).

Each DLL has a preferred load address. If it can be loaded at that
address, fine. If not, Windows will put it at a different address.
Apparently (and I don't know this for sure) the Cygwin stuff assumes
all DLLs will be at the same address in each process space (as would
always be the case in Win98, for example). So if DLLs conflict and are
loaded in different order, it is possible for process A to have DLLx
at addresss Z and process B has DLLy at the same address and Cygwin
apparently detects this and stops.

Rebasing moves the DLL load addresses to make this less likely. 

If you google on:

rebaseall cygwin

You'll see this is a common issue with certain packages. I don't think
it will really hurt anything. If you are really worried, copy all the
DLL files under c:\cygwin (or whatever your CYGROOT is) before you

Al Williams

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