https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65074
Bug ID: 65074
Summary: [5 Regression] r220674 broke C++ PIEs
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
CC: hjl at gcc dot gnu.org, rth at gcc dot gnu.org
namespace std
{
template <typename _CharT> struct char_traits;
template <typename _CharT, typename = char_traits <_CharT> > class
basic_filebuf;
template <typename _CharT, typename = char_traits <_CharT> > class
basic_ifstream;
typedef basic_ifstream <char> ifstream;
enum _Ios_Openmode { _S_in };
class basic_streambuf
{
};
struct basic_ios
{
typedef char char_type;
void init (void *);
typedef _Ios_Openmode openmode;
};
template <typename _CharT> class __basic_file;
template <> struct __basic_file <char>
{
__basic_file ();
~__basic_file ();
};
template <typename, typename _Traits> struct basic_filebuf : public
basic_streambuf
{
__basic_file <char> _M_file;
~basic_filebuf () { this->close (); }
void close ();
};
template <typename, typename _Traits> struct basic_ifstream : basic_ios
{
typedef _Traits traits_type;
basic_filebuf <char_type, traits_type> _M_filebuf;
basic_ifstream ();
basic_ifstream (const char *, basic_ios::openmode = _S_in)
{
this->init (0);
}
};
extern template class basic_filebuf <char>;
ifstream f (0);
}
with -O2 -fpie starting with r220674 uses
call _ZNSt13basic_filebufIcSt11char_traitsIcEED1Ev
instead of
call _ZNSt13basic_filebufIcSt11char_traitsIcEED1Ev@PLT
that was used previously, despite that symbol being defined in libstdc++.so.6.
