[Bug c++/30601] New: [4.3 regression] -Wreturn-type warns about more than what the documentation says

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

This little code
---------------
const double foo() { return 1.; }
---------------
used to be fine in C++ even in the presence of -Wreturn-type but now
yields a warning with recent mainline:

deal.II/tests> /tmp/bangerth/bin/bin/c++ -Wreturn-type -c x.cc
x.cc:1: warning: type qualifiers ignored on function return type

The point is that in C++, this sort of code is pretty common
because the return type may be a template-type or derived through
template metaprogramming typedef tricks, unlike in C where it may
indeed be an oversight. The documentation appears to recognize this
because it says that -Wreturn-type only warns about the const
qualifier for C, not for C++. Yet, the current code does warn. I
suspect that this was introduced in the recent reorganizations of
much of the warnings.

Best
  Wolfgang


-- 
           Summary: [4.3 regression] -Wreturn-type warns about more than
                    what the documentation says
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bangerth at dealii dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30601