uClinux中c++应用程序编译求助！！

Question

用的是snapgear的uClinux 2.0 uClibc  ，目标机芯片是leon2，sparc体系的。
用的是sparc-linux-tools-1.0.1

下列c++程序：testcpp.cxx
#include <iostream>
using namespace std;

int main(int argc,char **argv) {   
  cout<<"Hello world, i am a cxx program!"<<endl;  
  return 1;                 
}      

makefile中：
LDXXFLAGS= -nostartfiles /home/friky/embeded/snapgear-p33a/lib/uClibc/lib/crt1.o /home/friky/embeded/snapgear-p33a/lib/uClibc/lib/crti.o -L/home/friky/embeded/snapgear-p33a/lib/uClibc/lib -L/home/friky/embeded/snapgear-p33a/lib/libnet -Bstatic -elf2flt -mno-relax -mno-relax -mpic-none /opt/sparc-linux/sparc-linux/lib-uclibc-stdc++/crtbegin.o   -L /opt/sparc-linux/sparc-linux/lib -L /home/friky/embeded/snapgear-p33a/uClibc/libc  -L /opt/sparc-linux/sparc-linux/lib-uclibc-stdc++ -L /opt/sparc-linux/sparc-linux/lib-uclibc-stdc++/pic-none -L /opt/sparc-linux/sparc-linux/lib-uclibc-stdc++/soft -L /opt/sparc-linux/sparc-linux/lib-uclibc-stdc++/v8

LDXXLIBS= -nodefaultlibs -lc -lgcc -lstdc++ /opt/sparc-linux/sparc-linux/lib-uclibc-stdc++/crtend.o /home/friky/embeded/snapgear-p33a/lib/uClibc/lib/crtn.o

$(CC) -Wl,--start-group $(LDXXFLAGS) -o testcpp testcpp.o  -lstdc++ $(LDXXLIBS) -Wl,--end-group

执行make时提示：
testcpp.elf2flt(.text._ZNSt5ctypeIcE13classic_tableEv+0x2c): In function `std::ctype<char>::classic_table()':
：对‘__ctype_b_loc’未定义的引用
testcpp.elf2flt(.text._ZNSt5ctypeIcEC2EPiPKtbj+0x60): In function `std::ctype<char>::ctype[not-in-charge](int*, unsigned short const*, bool, unsigned)':
：对‘__ctype_toupper_loc’未定义的引用
testcpp.elf2flt(.text._ZNSt5ctypeIcEC2EPiPKtbj+0x6c): In function `std::ctype<char>::ctype[not-in-charge](int*, unsigned short const*, bool, unsigned)':
：对‘__ctype_tolower_loc’未定义的引用
testcpp.elf2flt(.text._ZNSt5ctypeIcEC2EPiPKtbj+0x84): In function `std::ctype<char>::ctype[not-in-charge](int*, unsigned short const*, bool, unsigned)':
：对‘__ctype_b_loc’未定义的引用
。。。。。。。。。。。。。。。

求助.......................................