[Bug libstdc++/50348] New: -fvisibility=hidden doesn't hide stl implementation details.

[pluto at agmk dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50348

             Bug #: 50348
           Summary: -fvisibility=hidden doesn't hide stl implementation
                    details.
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pluto@agmk.net


$ cat x.hpp
#ifndef x_hpp
#define x_hpp

#include <vector>
struct X { void foo(); };
typedef std::vector< X > VX;
VX bar() __attribute((visibility( "default" )));

#endif

$ cat x.cpp
#include "x.hpp"
VX bar() { return VX(); }


$ g++ -fvisibility=hidden -fvisibility-inlines-hidden -fPIC x.cpp -Wall -shared
-o libx.so -s
$ readelf -sW libx.so | grep -v UND | c++filt

Symbol table '.dynsym' contains 20 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     2: 00000000000007b0     0 FUNC    GLOBAL DEFAULT   10 _init
     3: 00000000000009f8     0 FUNC    GLOBAL DEFAULT   13 _fini
     6: 000000000000090c    30 FUNC    GLOBAL DEFAULT   12 bar()
     7: 000000000000092a    26 FUNC    WEAK   DEFAULT   12 std::vector<X,
std::allocator<X> >::vector()
     8: 000000000000092a    26 FUNC    WEAK   DEFAULT   12 std::vector<X,
std::allocator<X> >::vector()
     9: 0000000000000944    26 FUNC    WEAK   DEFAULT   12 std::_Vector_base<X,
std::allocator<X> >::_Vector_base()
    10: 000000000000095e    61 FUNC    WEAK   DEFAULT   12 std::_Vector_base<X,
std::allocator<X> >::_Vector_impl::_Vector_impl()
    11: 000000000000095e    61 FUNC    WEAK   DEFAULT   12 std::_Vector_base<X,
std::allocator<X> >::_Vector_impl::_Vector_impl()
    12: 000000000000099c    26 FUNC    WEAK   DEFAULT   12
std::allocator<X>::allocator()
    13: 00000000000009b6    10 FUNC    WEAK   DEFAULT   12
__gnu_cxx::new_allocator<X>::new_allocator()
    14: 0000000000000944    26 FUNC    WEAK   DEFAULT   12 std::_Vector_base<X,
std::allocator<X> >::_Vector_base()
    15: 000000000000099c    26 FUNC    WEAK   DEFAULT   12
std::allocator<X>::allocator()
    16: 00000000000009b6    10 FUNC    WEAK   DEFAULT   12
__gnu_cxx::new_allocator<X>::new_allocator()
    17: 0000000000001dc0     0 NOTYPE  GLOBAL DEFAULT  ABS _edata
    18: 0000000000001dc0     0 NOTYPE  GLOBAL DEFAULT  ABS __bss_start
    19: 0000000000001dd0     0 NOTYPE  GLOBAL DEFAULT  ABS _end


imho the std::vector details shouldn't have default visiblity in this case.