[Bug target/81907] undefined reference to `memset'

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81907

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|link-failure                |
             Target|arm                         |arm-*-*
          Component|middle-end                  |target
               Host|x86                         |
            Version|6.3.1                       |unknown
              Build|x86                         |

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>What is different optimization behavior(implementation) in GCC between cortex-a9 and cortex-a12 -given by mcpu or mtune option ?

Different tuning.  Though maybe at -Os should be almost the same except for the
allowance for using the instructions that are in cortex-a12 rather than a9 (for
the -mcpu case). 

But really memset is part of the C standard here and you don't use
-fno-hoisting option; though IIRC that still requires memset being included in
your libc.