On a box where amdfam10 is the native arch, 4.8 #defines two symbols with march=native which it does not with march=amdfam10:
:; gcc-4.8.0 -march=amdfam10 -E -dM - </dev/null |sort >/tmp/amdfam10 :; gcc-4.8.0 -march=native -E -dM - </dev/null |sort >/tmp/native :; diff -U0 /tmp/amdfam10 /tmp/native --- /tmp/amdfam10 2013-04-29 18:07:22.435553711 -0400 +++ /tmp/native 2013-04-29 18:07:14.987605897 -0400 @@ -76,0 +77 @@ +#define __FXSR__ 1 @@ -156,0 +158 @@ +#define __PRFCHW__ 1 Should -march=amdfam10 then also set -mfxsr and -mprfchw? -JimC -- James Cloos <cl...@jhcloos.com> OpenPGP: 1024D/ED7DAEA6
