This bug is a follow-up to bug c++/44122.

Given the following program:

$ cat t.c

typedef long Py_ssize_t;

void bar() {

 typedef int Py_ssize_t;
 Py_ssize_t pos;
}

When compiled with the C compiler with -Wshadow flag, a shadow warning is
emitted.

$ gcc -c t.c -Wshadow
t.c: In function ‘bar’:
t.c:5:14: warning: declaration of ‘Py_ssize_t’ shadows a global declaration
[-Wshadow]
t.c:1:14: warning: shadowed declaration is here [-Wshadow]

However, when using the C++ compiler with the same flag, no warning is emitted.

$ g++ -c t.c -Wshadow

I think C++ frontend should warn on this case as the C frontend.


-- 
           Summary: C++ frontend not warn on type shadowing with -Wshadow
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: lcwu at gcc dot gnu dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44128