Re: [gentoo-user] cflags for atom

[thegeezer <thegeezer@thegeezer.net>]

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On 10/21/2013 03:09 PM, Silvio Siefke wrote:
> Hello,
>
> on my netbook Acer Aspire One D255 is running Gentoo amd64 but its so slow.
> I have Samsung NC10 and there is running Gentoo better and that i understand
> not so really. 
>
> What Cflags i should use, at moment i use
>
> CFLAGS="-O2 -march=atom -mtune=atom -mssse3 -mfpmath=sse -fomit-frame-pointer -pipe"
> CXXFLAGS="${CFLAGS}"
> CHOST="x86_64-pc-linux-gnu"
> MAKEOPTS="-j3"
>
> processor	: 0
> vendor_id	: GenuineIntel
> cpu family	: 6
> model		: 28
> model name	: Intel(R) Atom(TM) CPU N550   @ 1.50GHz
> stepping	: 10
> microcode	: 0x107
> cpu MHz		: 1500.000
> cache size	: 512 KB
> physical id	: 0
> siblings	: 4
> core id		: 0
> cpu cores	: 2
> apicid		: 0
> initial apicid	: 0
> fpu		: yes
> fpu_exception	: yes
> cpuid level	: 10
> wp		: yes
> flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts nopl aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtherm
> bogomips	: 2992.64
> clflush size	: 64
> cache_alignment	: 64
> address sizes	: 32 bits physical, 48 bits virtual
> power management:
>
> Thats from 0 to 3. It were nice when someone can help.
>
>
> Thank you & Good Day
> Silvio
>
http://wiki.gentoo.org/wiki/CFLAGS

use native - it does the working out for you if GCC is new
CFLAGS="-march=native -O2 -pipe"


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