[kde-solaris] [kde-discuss] Gentle Question

Kunal Deo Kunal.Deo at Sun.COM
Mon May 12 23:26:48 CEST 2008

This is somewhat old, but confirms what Shawn has to say.


ABI comp. in GCC comes at a cost. However few things like scheduler
branch scheduler. works better with gcc.
http://gcc.gnu.org/onlinedocs/gcc/Compatibility.html . 

However performance issues can be resolved by using flags like -mcpu=v9
or -mcpu=v8 
whatever is applicable. 

There is a separate project called gcc4ss which targets at getting
everything running and at the same time faster as well.

See Alexey's latest blog :

The gap is being bridged. and look at the compatiblity benefits as well 
Kunal Deo

On Mon, 2008-05-12 at 15:49 -0500, Shawn Walker wrote: 

> On Mon, May 12, 2008 at 3:39 PM, Mats Rojestal
> <mats.rojestal at bredband.net> wrote:
> >  I can't figure out what the advantage of using sun compilers is,
> >  maybe a death wish. My simple observations from gcc 4.x.x performance is
> >  that it's not inferior to other compilers.
> >  Solaris is not a major player in the OS market and making it harder to
> >  port software to Solaris isn't really a good idea.
> It's simple. The GNU C++ complier produces binaries that are not ABI
> compatible with Sun Studio compilers.
> In addition, it produces code that is up to 50% slower on SPARC, and
> often slower on x86.
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