On 9/18/2010 13:15, Sergio Belkin wrote:
2010/9/18 Mattias Ellert<mattias.ellert(a)fysast.uu.se>:
> Using -mtune=atom is the correct flag when building ix86 rpms for the
> most recent Fedora releases. The optflags are by design the same on any
> ix86 installation - they do not change depending on what hardware is
> present on the build machine. That you are building on a netbook does
> not influence what %optflags is expanded into.
>
> Mattias
>
>
Mmm... Now I am a bit confused. So... Isn't "-mtune" an optimization
flag for a specific target arch. ?
Please correct me if I'am wrong :)
You are mostly right, but it is "-march" that defines the instruction
set to be used. "-mtune" chooses which CPU the compiler will try to
optimize for within the limits of the chosen instruction set. Fedora
uses "atom" for this value, but that does not make it incompatible with
other hardware.