[Bug c/21668] New: gratuitous warning about "extern const" with initializer

["gdr at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

gcc spits a warning on the following snippet:

% cat const-extern.c && gcc -c const-extern.c      
extern const int foo = 200;

const-extern.c:1: warning: 'foo' initialized and declared 'extern'

Notice that the code snippet is a well-defined construct at the
intersection of both C and C++, and actually is the way of
properly initializing a const object (in C++) with external
linkage -- if you remove the "extern" then, it gets an internal
linkage.  So it is not helpful for the C front-end to emit
unconditional warning on that construct -- even a pedwarn
is not helpful.

-- Gaby

-- 
           Summary: gratuitous warning about "extern const" with initializer
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gdr at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: plateform independent


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21668