Compiler Flags for SPARC64
Christian Baer
christian.baer at uni-dortmund.de
Wed Feb 21 12:11:09 UTC 2007
On Mon, 19 Feb 2007 12:45:51 -0500 Kris Kennaway wrote:
>> Has anyone got any ideas on how to go on with this?
>
> You'll have to look at the compiler spec and how it is bootstrapped.
That could become quite a project.
> FWIW, I don't think there are any secret flags you can set to improve
> the compiler targetting, as the defaults are already appropriate.
These are not 'secret' flags:
http://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/SPARC-Options.html#SPARC-Options
Also look a this:
http://www.osnews.com/story.php/6136/SPARC-Optimizations-With-GCC/page1
gcc by default creates v7 code which is a fair bit slower on a v9 CPU
than v9 code. And I can't find anything that suggests that FreeBSD has
any default flags that take this into account.
Regards
Chris
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