Re: optimizations with -mcpu=cortex-a8, -mtune=cortex-a8

[Ian Lance Taylor <iant at google dot com>]

"Dasgupta, Romit" <romit@ti.com> writes:

>      I came across the -mpcu=cortex-a8 option in the codesourcery
>      gcc. When I added that to build the Linux kernel, I found that
>      there are no differences in the kernel code with and without
>      the options.  The following are the gcc options that where used
>      to build the kernel. Am I missing something?

gcc@gcc.gnu.org is the wrong mailing list for this sort of question.
It should be asked on gcc-help@gcc.gnu.org.  Please take any followups
there.  Thanks.

In this case it's fairly likely that the default CPU for your compiler
is something similar to cortex-a8.  The differences between CPUs are
often fairly subtle, and may not cause a change in the generated code
for most, or sometimes any, programs.

Ian