Subject: Re: Problem Executing Application Beginning at gcc Version 4.1.3

[Marshall Lake]

> > I have an application which compiles cleanly (on i386 Linux using 
> > options -g -O2 -pedantic -I../include -Wall `pkg-config --cflags 
> > gtk+-2.0`) and executes cleanly using gcc versions 4.1.2 and earlier 
> > (I've tried 3.4.1, 4.0.2 & 4.1.2).
> > 
> > But starting with version 4.1.3 (I've tried 4.1.3 & 4.2.1) my 
> > application compiles cleanly but does not execute properly.  I'm 
> > having a very difficult time trying to pinpoint the exact cause.  The 
> > change in execution is subtle but affects the same area of the 
> > application everytime.

> > Also, I see on http://gcc.gnu.org/ that it indicates the latest
> > version in the 4.1.x series is 4.1.2.  Is that correct or in error?

> That is correct.  There is no gcc 4.1.3 release.  I don't know what code 
> you are using.

Could it be that 4.1.3 was changed to be the initial release in the 4.2.x 
series?  And somehow I downloaded an "in-between" version?

> If you can't figure out why code is not executing properly, a good thing 
> to try is -fno-strict-aliasing.  Another is -fno-strict-overflow.  If 
> either of those options fixes the problem, then it is likely that your 
> code is accidentally relying on undefined behaviour.

Neither of those two options fixes the problem for me.  Could that mean 
that there's a bug in the 4.2.x series?

-- 
Marshall Lake -- mlake@mlake.net -- http://mlake.net