Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com X-Injected-Via-Gmane: http://gmane.org/ To: cygwin@cygwin.com From: Joe Buehler Subject: Re: trying to compile emacs under cygwin Date: Fri, 28 Mar 2003 09:23:06 -0500 Organization: Spirent Communications, Inc. Lines: 40 Message-ID: <3E845ACA.7070302@hekimian.com> References: <3E81DEFC.8080603@hekimian.com> <16003.31199.26941.271222@gargle.gargle.HOWL> Reply-To: jbuehler@hekimian.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@main.gmane.org User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: en-us, en In-Reply-To: <16003.31199.26941.271222@gargle.gargle.HOWL> X-Enigmail-Version: 0.73.1.0 X-Enigmail-Supports: pgp-inline, pgp-mime Robert Mecklenburg wrote: > Static heap usage: 2129280 of 10648960, slop is 65536 -- 8320k wasted -- reset to 2194816k > emacs: SHEAP_ADJUSTMENT needs to be modified to reduce memory waste! You increased the heap size, but it's outside the fuzz range -- you are over it by about 8 MB. Emacs would run, but the problem is that the binary would be a lot larger than it needs to be. Under Cygwin, this is an issue because of the way that fork() works. So what you have to do is increase SHEAP_ADJUSTMENT by enough that you end up in the comparison fuzz range. > actually writes sheap.c, so I edit the script to change the -620000 > to: > > +#ifdef HAVE_X_WINDOWS > +#define SHEAP_ADJUSTMENT 2194816 /* XEmacs does this dynamically */ > +#else > +#define SHEAP_ADJUSTMENT 2194816 /* XEmacs does this dynamically */ > +#endif That's the correct thing to do. Edit the build script -- it patches the original emacs source for Cygwin. What you want to do is look at the message you get after you compile: Static heap usage: 2129280 of 10648960, slop is 65536 -- 8320k wasted -- reset to 2194816k And figure out what to set SHEAP_ADJUSTMENT to based on how the first two numbers compare. The message says that you used 2129280 bytes out of 10648960 available, so decrease SHEAP_ADJUSTMENT by (10648960 - 2129280). SHEAP_ADJUSTMENT will be some negative number because the base heap size is 8 MB, and emacs doesn't need anywhere near that. If it helps any, this piece of code hurts my head also -- I have no idea why it is set up to be so complicated. But it works! -- Joe Buehler -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/