On 17/08/2013 08:38, Walter Dnes wrote:
I have the following in make.conf
CFLAGS="-O2 -march=native -fomit-frame-pointer -pipe -fno-unwind-tables
-fno-asynchronous-unwind-tables"
CXXFLAGS="${CFLAGS}"
...where "-march=native" will always work correctly for a local build.
The only possible worry is if you're cross-compiling and or distributing
a binary to multiple machines. It also saves me the headache of
figuring out the CFLAGS setting whenever I get a new machine. You still
have to set up the correct processor in the kernel, however.
While -march=native is generally good advice, GCC is not perfect and on
occasion it can flags to be enabled that are not supported, resulting in
the invalid instruction error.
