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

[airbak.li at huawei dot com]

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

            Bug ID: 78181
           Summary: unrecognized option -mcpu=cortex-a73
           Product: gcc
           Version: 6.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: airbak.li at huawei dot com
  Target Milestone: ---

When I build a cross-toolchain with gcc 6.2.
When I used -mcpu=cortex-a73, it failed.
When I used -mtune=cortex-a73, is OK.

ljhui@key:~/toolchain/git/build-toolchain/gcc-uclibc$
/home/os_net/ljhui/toolchain/git/build-toolchain/gcc-uclibc/gcc_build/./gcc/xgcc
-B/home/os_net/ljhui/toolchain/git/build-toolchain/gcc-uclibc/gcc_build/./gcc/
-B/home/os_net/ljhui/toolchain/git/build-toolchain/gcc-uclibc/install/arm-hisiv510-linux/arm-hisiv510-linux-uclibcgnueabi/bin/
-B/home/os_net/ljhui/toolchain/git/build-toolchain/gcc-uclibc/install/arm-hisiv510-linux/arm-hisiv510-linux-uclibcgnueabi/lib/
-isystem
/home/os_net/ljhui/toolchain/git/build-toolchain/gcc-uclibc/install/arm-hisiv510-linux/arm-hisiv510-linux-uclibcgnueabi/include
-isystem
/home/os_net/ljhui/toolchain/git/build-toolchain/gcc-uclibc/install/arm-hisiv510-linux/arm-hisiv510-linux-uclibcgnueabi/sys-include
-mcpu=cortex-a73 -o conftest -g -O2 a.c
Assembler messages:
Error: unknown cpu `cortex-a73'
Error: unrecognized option -mcpu=cortex-a73