[Bug fortran/55696] New: Error linking using gfortran with C++ code compiled with -std=c++11

["kyle.niemeyer at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55696

             Bug #: 55696
           Summary: Error linking using gfortran with C++ code compiled
                    with -std=c++11
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: kyle.niemeyer@gmail.com


Created attachment 28968
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28968
main.f90 holds Fortran program that calls C++ subroutine in sub.cpp

I'm running into a linker error when mixing Fortran 90 code with C++ code
compiled using "-std=c++11".

The attached code compiles and links fine with:
gfortran -c main.f90
g++ -c sub.cpp
gfortran -o prog main.o sub.o -lstdc++

But, if I compile the C++ code with:
g++ -c sub.cpp -std=c++11

then linking fails with the error:
Undefined symbols for architecture x86_64:
  "std::basic_string<char, std::char_traits<char>, std::allocator<char>
>::basic_string(std::basic_string<char, std::char_traits<char>,
std::allocator<char> >&&)", referenced from:
      __ZN9__gnu_cxx13new_allocatorISsE9constructISsISsEEEvPT_DpOT0_ in sub.o
      __ZSt10_ConstructISsISsEEvPT_DpOT0_ in sub.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status

I'm using gfortran and g++ 4.7.2.