/home/shenry/tmp/ccMpkNJv.o(.text+0xd): In function `std::__verify_grouping(char const*, unsigned int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
: undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::size() const'
/home/shenry/tmp/ccMpkNJv.o(.text+0x60): In function `std::__verify_grouping(char const*, unsigned int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
: undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned int) const'
/home/shenry/tmp/ccMpkNJv.o(.text+0x9d): In function `std::__verify_grouping(char const*, unsigned int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
: undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned int) const'
/home/shenry/tmp/ccMpkNJv.o(.text+0xc8): In function `std::__verify_grouping(char const*, unsigned int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
: undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned int) const'
/home/shenry/tmp/ccMpkNJv.o(.text+0x129): In function `main':
: undefined reference to `std::cout'
/home/shenry/tmp/ccMpkNJv.o(.text+0x12e): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
/home/shenry/tmp/ccMpkNJv.o(.text+0x15a): In function `__static_initialization_and_destruction_0(int, int)':
: undefined reference to `std::ios_base::Init::Init()'
/home/shenry/tmp/ccMpkNJv.o(.text+0x189): In function `__tcf_0':
: undefined reference to `std::ios_base::Init::~Init()'
/home/shenry/tmp/ccMpkNJv.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status