On 08/28/2010 08:41 PM, Philip Prindeville wrote: > Hi. > > I work a bit with Asterisk, the IP-PBX open software. There's a GSM > library that's included in the source tree. > > The problem we're encountering is that when compiled with gcc 4.1.x and > 4.3 or later, it works fine. > > But some of our target platforms only support gcc 4.2, and when we > compile against this, the optimizer in GCC exposes the fact that someone > writing some ASM stubs forgot to correctly annotate a constraint, and > that lack of a constraint is causing the optimizer to change the > generated object more than it should. > > There are a lot of lines of source code, and most of my experience with > asm() stubs has been rudimentary, so I'm asking for an outside pair of > eyeballs that might be better skilled at identifying how the asm should > be annotated than me. How do you know that the asm is the problem? Andrew.
