On Thursday, November 15, 2012 5:34:33 PM UTC+1, leif wrote:

> So what does 
>
> $ gcc-4.6 -march=native -v -c -x c /dev/null -o /dev/null 2>&1 | grep -w 
> cc1 
>
>
 /usr/lib/gcc/x86_64-linux-gnu/4.6/cc1 -quiet -v -imultilib . -imultiarch 
x86_64-linux-gnu /dev/null -march=corei7-avx -mno-cx16 -msahf -mno-movbe 
-mno-aes -mno-pclmul -mno-popcnt -mno-abm -mno-lwp -mno-fma -mno-fma4 
-mno-xop -mno-bmi -mno-tbm -mno-avx -mno-sse4.2 -mno-sse4.1 -mno-rdrnd 
-mno-f16c -mno-fsgsbase --param l1-cache-size=32 --param 
l1-cache-line-size=64 --param l2-cache-size=6144 -mtune=corei7-avx -quiet 
-dumpbase null -auxbase-strip /dev/null -version -fstack-protector -o 
/tmp/ccdLHpEj.s

give (especially the '-m...' parameters passed to 'cc1'), in contrast to 
> what MPIR used (shown by 'configure', the lines after 'using ABI="...") ? 
>
>
> By the way, Ubuntu's "GCC 4.6" is presumably Ubuntu's GCC 4.6.3, which 
> is quite different to FSF's GCC 4.6.3, i.e., besides some other changes  

contains parts from the 4.7 branch. 
>
>
This is a very good point. I didn't notice.

-- Elias
 

>
>

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