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Message-ID:	<409098C3.6060309@ompf.org>
Date:	Thu, 29 Apr 2004 07:55:15 +0200
From:	tbp <gcc AT ompf DOT org>
Reply-To:	gcc AT ompf DOT org
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To:	Ross Ridge <rridge AT csclub DOT uwaterloo DOT ca>
CC:	cygwin AT cygwin DOT com
Subject:	Re: g++ 3.4.0 cygwin, codegen SSE & alignement issues
References:	<20040428224615 DOT 2B667A8663 AT perpugilliam DOT csclub DOT uwaterloo DOT ca>
In-Reply-To:	<20040428224615.2B667A8663@perpugilliam.csclub.uwaterloo.ca>

Ross Ridge wrote:
> Apparently the code that SDL calls to create the threads doesn't create
> threads with aligned stacks.  If SDL is using Cygwin functions to create
> threads but these functions are creating threads that don't have 16-byte
> aligned stacks then this is a Cygwin problem. 
SDL is a bit of a pain regarding cygwin (they insist on using mingw 
etc)... Anyway with Brian Ford patch in hand i have some chances to 
teach it how to behave.

> You need to write an assembler function (you can't use inline assembly
> to fix this problem reliably) for each callback function in your code
> that's called *directly* by a function that's not compile with GCC.
> Something like this:
Ah, i didn't know about the no-inline asm clause (my kludge didn't seem 
to do any good). Thanks for the clue.

>>PS: I've never found out how to build a 'cygming special' binary from 
>>gcc sources, i can only make a cygwin or mingw. What's the trick?
> Download and compile the Cygwin modified sources.  
Doh :)

Thanks for time,
	tbp.



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