GCC x86 Receives New Intel CPU Tuning Target

[phoronix]

Phoronix: GCC x86 Receives New Intel CPU Tuning Target

With future versions of GCC there is now a "-mtune=ia" target for the GNU Compiler Collection's x86 back-end to always optimize the compiled program for the very latest Intel processors...

http://www.phoronix.com/vr.php?view=MTUzNzE

[smetsjan]

It got changed to mtune=intel
See http://gcc.gnu.org/gcc-4.9/changes.html

[FourDMusic]

Suppose I add the -mtune=ia option by default to my {C,CXX}FLAGS when compiling using GCC because I have the latest Intel CPU. A new Intel CPU architecture comes out, after which I upgrade GCC. Does this mean that the binaries I now produce won't work on my hardware?

[curaga]

Check the gcc manual - mtune doesn't affect the "will it run on foo", march does.

[FourDMusic]

Check the gcc manual - mtune doesn't affect the "will it run on foo", march does.

Sweet, thanks! Here's a good SO post that explains the difference: http://stackoverflow.com/questions/1...ent-from-mtune