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On Tue, Jun 29, 2010 at 8:54 PM, Albert Hopkins <marduk@×××××××××××.org> wrote: |
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> On Wed, 2010-06-30 at 11:09 +1000, Beau Henderson wrote: |
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>> On 06/30/10 08:07, Paul Hartman wrote: |
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> [...] |
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>> > You can see which options -march=native would use by running this command: |
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>> > |
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>> > gcc -Q --help=target -march=native |
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>> > |
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>> > (thanks to Daniel Iliev for the tip) |
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>> > |
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>> |
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>> Perhaps I'm missing something but running the above gives me the impression that -march=native |
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>> actually only configures the bare minimal install. I'm not seeing -mmmx or -msse3 enabled on my |
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>> k8-sse3 for instance ( amongst much else ). |
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>> |
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> |
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> -march sometimes implies a some things. E.g., anything above a pentium2 |
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> implies MMX. My hunch is that k8-sse3 implies... sse3. |
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See this page of the GCC documentation for some info about what is |
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enabled in the different arches: |
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|
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http://gcc.gnu.org/onlinedocs/gcc-4.4.3/gcc/i386-and-x86_002d64-Options.html |
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