[Bug c/19866] New: Conversion from "type **" to "const type **" issues a warning.

["jorgleis at in-exedra dot net" <gcc-bugzilla at gcc dot gnu dot org>]

Example program "test.c":
  void foo(const void **bar) {
  }

  int main() {
    void **bar = 0;
    foo(bar);
  }

Compilation with "gcc test.c":
test.c:6: warning: passing arg 1 of `foo' from incompatible pointer type.

Expected result: compilation without any warning at all.
Using pointers to pointers, it happens always.

gcc -v:
Reading specs from /usr/lib/gcc/i686-pc-linux-gnu/3.4.1/specs
Configured with: ../gcc-3.4.1/configure --prefix=/usr --libexecdir=/usr/lib
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --enable-languages=c,c++,objc,f77,ada,java
Thread model: posix
gcc version 3.4.1

-- 
           Summary: Conversion from "type **" to "const type **" issues a
                    warning.
           Product: gcc
           Version: 3.4.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jorgleis at in-exedra dot net
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19866