[LLVMbugs] [Bug 6737] New: reference to a thunk generated while g++ generates none

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Mar 29 09:33:12 PDT 2010


           Summary: reference to a thunk generated while g++ generates
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: rdivacky at freebsd.org
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com

pes delta$ cat compatibility.cc                                                
namespace std __attribute__ ((__visibility__ ("default"))) {
        template<class _CharT>     struct char_traits;
      typedef long __int64_t;
      typedef __int64_t __ptrdiff_t;
     typedef __ptrdiff_t ptrdiff_t;
      namespace std __attribute__ ((__visibility__ ("default"))) {
            typedef ptrdiff_t streamsize;
        template<typename _CharT, typename _Traits = char_traits<_CharT> >    
class basic_ostream;
        template<typename _CharT, typename _Traits = char_traits<_CharT> >    
class basic_fstreamXX;
         template<typename, typename>     struct __are_same     {
        namespace std __attribute__ ((__visibility__ ("default"))) {
            enum _Ios_Fmtflags     {
          _S_beg = 0,       _S_cur = 1,       _S_end = 2,      
_S_ios_seekdir_end = 1L << 16     };
      class ios_base   {
          virtual ~ios_base();
     namespace std __attribute__ ((__visibility__ ("default"))) {
        template<typename _CharT, typename _Traits>     class basic_ios :
public ios_base     {
           protected:       basic_ostream<_CharT, _Traits>* _M_tie;
      template<typename _CharT, typename _Traits>     class basic_istream :
virtual public basic_ios<_CharT, _Traits>     {
         protected:              streamsize _M_gcount;
        template<typename _CharT, typename _Traits>     class basic_iostream   
 : public basic_istream<_CharT, _Traits>,       public basic_ostream<_CharT,
_Traits>     {
        template<typename _CharT, typename _Traits>     class basic_ostream :
virtual public basic_ios<_CharT, _Traits>     {
        template<typename _CharT, typename _Traits>     class basic_fstreamXX :
public basic_iostream<_CharT, _Traits>     {
             bool       is_open() const       {
        template     bool     basic_fstreamXX<char>::is_open() const;
pes delta$ clang++ -c compatibility.cc && nm compatibility.o | grep Thn
0000000000000000 W _ZThn16_NSdD0Ev
0000000000000000 W _ZThn16_NSdD1Ev
0000000000000000 W _ZThn16_NSt15basic_fstreamXXIcSt11char_traitsIcEED0Ev
0000000000000000 W _ZThn16_NSt15basic_fstreamXXIcSt11char_traitsIcEED1Ev
pes delta$ g++ -c compatibility.cc && nm compatibility.o | grep Thn
pes delta$

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