XCode 4.4 harmful

[Joshua Root]

On 2012-9-18 21:36 , Craig Treleaven wrote:
> Hi:
> 
> In case it helps others, it appears that XCode 4.4 is the cause of a
> run-time problem with mythtv-core.25.  To recap, for some users, one of
> Myth's programs, mythfrontend, would consistently segfault before the
> main window was drawn (with the crashed thread in libunwind):
> 
> https://trac.macports.org/ticket/35934
> 
> One of the affected users, James George, put a tremendous amount of work
> into tracking down the issue.  We eventually determined that the code
> would run successfully if built with apple-gcc-4.2.  James has
> determined that code produced with XCode 4.3.3 works OK; XCode 4.4.0+
> leads to crashes.  Testing done on 10.7.4.
> 
> There were no obvious errors reported in the XCode 4.4.0+ builds.
> 
> Could someone identify what changed from 4.3.3 to 4.4.0 that might
> account for this?  Bonus points if you can put it in simple terms that I
> can follow!  ;)

Have you tried Xcode 4.4's llvm-gcc-4.2? If that works, it would narrow
the problem down to clang.

- Josh