Re: [Qemu-devel] [PATCH] support for Mac OS X default compiler

[Joachim Henke]

Please note that '-fno-tree-ch' is passed to GCC4 only for compiling  
op.c, so that 'dyngen' doesn't fail, when it is working on op.o  
afterwards! All other source files are still compiled without this flag.

On x86 GCC4 fails during compilation of op.c anyway. But '-fno-tree- 
ch' could also help for Linux PPC and MIPS, SPARC, etc. I would  
encourage users of these systems to test, if compiling with GCC4  
works with this patch.

This patch shouldn't break anything. It just disables some  
optimizations - and only for op.o

Jo.


Johannes Schindelin wrote:
> Hi,
>
> On Tue, 20 Dec 2005, Daniel Egger wrote:
>
> > On 19.12.2005, at 23:35, Fabrice Bellard wrote:
> >
> > > Does -fno-tree-ch works on PC ?
> >
> > Yes. However using it might introduce a performance hit.
>
> Why not just test for Darwin *and* for GCC 4, and be done with it?
>
> Ciao,
> Dscho