[Bug c/25509] New: can't voidify __attribute__((warn_unused_result))

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

casting to (void) doesn't avoid the unused_result warning. testcase: 

=== Cut ===
extern int foo() __attribute__((warn_unused_result));
int main()
{
   (void) foo();

   return 0;
}
=== Cut ===
g++ -Wall -W -O2 -c unused.cc

unused.cc: In function 'int main()':
unused.cc:4: warning: ignoring return value of 'int foo()', declared with
attribute warn_unused_result


-- 
           Summary: can't voidify __attribute__((warn_unused_result))
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mueller at kde dot org
  GCC host triplet: i686-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509