[Bug target/58869] New: switch -mcu=cortex-a7 conflicts with -march=armv7-a switch

[wwfiney at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58869

            Bug ID: 58869
           Summary: switch -mcu=cortex-a7 conflicts with -march=armv7-a
                    switch
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: wwfiney at hotmail dot com

When I compile code for cortex-a7, gcc reported a warning:
cc1: warning: switch -mcu=cortex-a7 conflicts with -march=armv7-a switch
[enabled by default]
But cortex-a7 IS armv7-a architecture.
So how can I set this switch?