On 16 September 2016 at 13:50, Mahmood Naderan wrote: >> -march=amdfam10 > > > Actually, I tried with march and got the same, dropping march (the default is native) also results the same. I will try with mtune. The default should not be native, that compiles code that can only run on a particular machine (or identical ones). That's a very bad default. Using a more generic instruction set would produce binaries that run on all hardware, e.g. -march=x86-64
