[KOS] trouble with standard library

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So I'm in the process of converting code over from c to c++.(The code was
based of the PNG example.)

Currently I'm trying to use functions from the standard library like
#include<vector>, #include<string> and #include<fstream>.

When I try and compile the program in Cygwin. I get these errors coming up
and interrupting the process.

The errors I'm getting are in this block of text it returns back to me:

/home/YouPeople/dc/kos//utils/bin2o/bin2o romdisk_boot.img romdisk_boot
romdisk_boot.o
/opt/toolchains/dc/sh-elf/bin/sh-elf-gcc -O2 -fomit-frame-pointer -ml
-m4-single-only -ffunction-sections -fdata    -sections
-I/home/YouPeople/dc/kos//include
-I/home/YouPeople/dc/kos//kernel/arch/dreamcast/include -I/home/You
People/dc/kos//addons/include
-I/home/YouPeople/dc/kos//../kos-ports/include -D_arch_dreamcast
-D_arch_sub_prist    ine -Wall -g -fno-builtin -fno-strict-aliasing  -ml
-m4-single-only -Wl,-Ttext=0x8c010000 -Wl,--gc-sections -T/h
ome/YouPeople/dc/kos//utils/ldscripts/shlelf.xc -nodefaultlibs
-L/home/YouPeople/dc/kos//lib/dreamcast -L/home/Y
ouPeople/dc/kos//addons/lib/dreamcast
-L/home/YouPeople/dc/kos//../kos-ports/lib -o example.elf  example.o
wfont    .o romdisk_boot.o -lpng -lz -lm -Wl,--start-group -lkallisti -lc
-lgcc -Wl,--end-group
example.o: In function `__check_facet<std::ctype<char> >':
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::_Rep::_S_empty_rep_stor    age'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::ios_base::ios_base()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `vtable for std::basic_ios<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `VTT for std::basic_ifstream<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_ios<char, std::char_traits<char>
>::init(std::basic_streambuf<char, std::char_traits    <char> >*)'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `vtable for std::basic_ifstream<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `vtable for std::basic_ifstream<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_filebuf<char, std::char_traits<char>
>::basic_filebuf()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_filebuf<char, std::char_traits<char>
>::open(char const*, std::_Ios_Openmode)'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_ios<char, std::char_traits<char>
>::clear(std::_Ios_Iostate)'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_istream<char, std::char_traits<char>
>& std::getline<char, std::char_traits<char>, s    td::allocator<char>
>(std::basic_istream<char, std::char_traits<char> >&,
std::basic_string<char, std::char_trai    ts<char>, std::allocator<char>
>&, char)'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::_M_leak_hard()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:51:
undefin    ed reference to `std::__throw_bad_cast()'
example.o: In function
`_ZNSt9basic_iosIcSt11char_traitsIcEE8setstateESt12_Ios_Iostate':
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `std::ctype<char>::_M_widen_init() const'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `VTT for std::basic_ifstream<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `std::basic_filebuf<char, std::char_traits<char>
>::close()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `vtable for std::basic_ifstream<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `vtable for std::basic_ifstream<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `vtable for std::basic_filebuf<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `std::__basic_file<char>::~__basic_file()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `vtable for std::basic_streambuf<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `std::locale::~locale()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `std::ios_base::~ios_base()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `vtable for std::basic_ios<char,
std::char_traits<char> >'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/basic_ios.h:130:
undefi    ned reference to `std::basic_ios<char, std::char_traits<char>
>::clear(std::_Ios_Iostate)'
example.o: In function `_ZNSs4_Rep10_M_disposeERKSaIcE':
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/stl_vector.h:161:
undef    ined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::_Rep::_S_empty_rep_st    orage'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/stl_vector.h:161:
undef    ined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string(std::bas    ic_string<char,
std::char_traits<char>, std::allocator<char> > const&)'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/stl_vector.h:161:
undef    ined reference to `std::__throw_bad_alloc()'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/stl_vector.h:161:
undef    ined reference to `__gnu_cxx::__exchange_and_add(int volatile*,
int)'
/opt/toolchains/dc/sh-elf/lib/gcc/sh-elf/4.7.3/../../../../sh-elf/include/c++/4.7.3/bits/stl_vector.h:161:
undef    ined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::_Rep::_M_destroy(std:    :allocator<char> const&)'
collect2: error: ld returned 1 exit status
make: *** [Makefile:33: example.elf] Error 1

I wanna try and make sense of this, but have no idea where to begin. Or
what the problem even is. Please help!