[Bug c/78181] unrecognized option -mcpu=cortex-a73

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78181

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |ktkachov at gcc dot gnu.org
         Resolution|---                         |INVALID

--- Comment #1 from ktkachov at gcc dot gnu.org ---
support for Cortex-A73 was added to GCC 7.
Are you using a non-FSF GCC 6.2? Perhaps a Linaro toolchain?

In any case, -mtune guides tuning decisions without enforcing any particular
architecture features. -mcpu requires the toolchain to use the architecture
features of its argument (Cortex-A73 in this case) so it outputs that
information in the assembly. You require assembler support for that.
You need to update your binutils as support for Cortex-A73 was added to them in
June 2016. I think it was in the 2.26 release