| 1 |
--- On Thu, 5/21/09, Alex Schuster <wonko@×××××××××.org> wrote: |
| 2 |
|
| 3 |
> From: Alex Schuster <wonko@×××××××××.org> |
| 4 |
> Subject: [gentoo-user] Re: -march=auto |
| 5 |
> To: gentoo-user@l.g.o |
| 6 |
> Received: Thursday, May 21, 2009, 12:30 PM |
| 7 |
> I just wrote: |
| 8 |
> |
| 9 |
> > > Could also perhaps try -march=auto if you're |
| 10 |
> using a version of GCC |
| 11 |
> > > that supports it. |
| 12 |
> |
| 13 |
> Oh, it's -march=native. |
| 14 |
> |
| 15 |
> > BTW, is there a possibility to let gcc tell what flags |
| 16 |
> it will actually |
| 17 |
> > use with -march=auto? |
| 18 |
> |
| 19 |
> Paul Hartman just posted a link to a script that seems to |
| 20 |
> do what I was |
| 21 |
> looking for in the "[OT]eee 900a intel atom is what |
| 22 |
> processor family?" |
| 23 |
> thread: <http://www.pixelbeat.org/scripts/gcccpuopt> |
| 24 |
> |
| 25 |
> But it suggests using -march=k8 - isn't that a 64-bit-only |
| 26 |
> thing? I'm not |
| 27 |
|
| 28 |
For an 900A w/intel Atom? |
| 29 |
|
| 30 |
This is what I get: |
| 31 |
|
| 32 |
Warning: Your compiler supports the -march=native option which you may prefer |
| 33 |
Warning: Newer versions of GCC better support your CPU with -march=atom |
| 34 |
-march=core2 -mtune=pentium -mfpmath=sse. |
| 35 |
|
| 36 |
Now I'm confused. It says *my* compiler supports -march=native. Then it says "Newer versions". Isn't v4.3.2 new? It was from a new pkg about a month ago. Is it giving me a choice here? Can I really declare two -march variables? What about mtune and mfpath, are they meant to be "instead of" or "in addition to"? What goes in the kernel config? What in /etc/paludis/bashrc? |
| 37 |
|
| 38 |
Maxim |
| 39 |
|
| 40 |
|
| 41 |
|
| 42 |
|
| 43 |
__________________________________________________________________ |
| 44 |
Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now |
| 45 |
http://ca.toolbar.yahoo.com. |
Archives