[Bug c/20652] New: rejects code with an error: aliased to undefined symbol

["belyshev at depni dot sinp dot msu dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------------------------------------------------------------------------------
extern int foo;
extern int bar __attribute__ ((alias ("foo")));
------------------------------------------------------------------------------

$ gcc foo.i 
foo.i:2: error: ?bar? aliased to undefined symbol ?foo?
$

this code is taken from glibc/sysdeps/wordsize-64/wcstol_l.c and it was accepted
by gcc 3.4 and earlier.

-- 
           Summary: rejects code with an error: aliased to undefined symbol
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: belyshev at depni dot sinp dot msu dot ru
                CC: gcc-bugs at gcc dot gnu dot org,rth at gcc dot gnu dot
                    org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20652