[Bug c/53066] New: Wshadow should not warn for shadowing an extern function

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53066

             Bug #: 53066
           Summary: Wshadow should not warn for shadowing an extern
                    function
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: m...@gcc.gnu.org


As described by Linus here:
http://lkml.indiana.edu/hypermail/linux/kernel/0611.3/1020.html

This makes Wshadow useless on real code.