g++ on HPUX

I have problems to build the following
small C++ programm with g++ 3.2.3 at a
HP-UX B.11.11 U 9000/800.

#include <sstream>
#include <string>
#include <iostream>

using namespace std;

int main()
{
std::stringstream ss;
std::string str;
ss << 4; ss >> str;
std::cout << "str: " << str << std::endl;
return 0;
}

I get a linker error from HPs linker:

/usr/ccs/bin/ld: Unsatisfied symbols:
std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_stringstream
[in-charge]()(first referenced in /var/tmp//ccvy3bfa.o) (code)
std::basic_stringstream<char, std::char_traits<char>, std::allocator<char>
::basic_stringstream[in-charge](std::_Ios_Openmode)(first referenced in /var/tmp//ccvy3bfa.o) (code)
collect2: ld returned 1 exit status

To get more information I did a:

1) g++ -c main.cpp
2) g++ -W,l -v main.o

Here comes the output:

Reading specs from /usr/local/lib/gcc-lib/hppa2.0n-hp-hpux11.00/3.2.3/specs
Configured with: ./configure --prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as
+--with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix
+--disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure
+--prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib
+--enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as
+--with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix
+--disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure
+--prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib
+--enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as
+--with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix
+--disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure
+--prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib
+--enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as
+--with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix
+--disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure
+--prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib
+--enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix --disable-shared --with-gnu-as
+--with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77 : (reconfigured) ./configure --prefix=/usr/local --enable-threads=posix
+--disable-shared --with-gnu-as --with-libiconv-prefix=/usr/local/lib --enable-languages=c,c++,f77
Thread model: posix
gcc version 3.2.3
/usr/local/lib/gcc-lib/hppa2.0n-hp-hpux11.00/3.2.3/collect2 -L/lib/pa1.1 -L/usr/lib/pa1.1 -z -u main /usr/ccs/lib/crt0.o
+-L/usr/local/lib/gcc-lib/hppa2.0n-hp-hpux11.00/3.2.3 -L/usr/ccs/bin -L/usr/ccs/lib -L/opt/langtools/lib
+-L/usr/local/lib/gcc-lib/hppa2.0n-hp-hpux11.00/3.2.3/../../.. main.o -lstdc++ -lm -lgcc -lc -lgcc
/usr/ccs/bin/ld: Unsatisfied symbols:
std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_stringstream [in-charge]()(first referenced in
+main.o) (code)
std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::basic_stringstream[in-charge](std::_Ios_Openmode)(first
+referenced in main.o) (code)
collect2: ld returned 1 exit status

gcc was built with "--disable-shared" so the linker does not try link against
the shared libraries.

How can I check the gcc installation/enivronment ?
In the specified directory:
/usr/local/lib/gcc-lib/hppa2.0n-hp-hpux11.00/3.2.3/../../..
there exist a libstdc++.

I did a
nm main.o | grep stringstream
and got
U _ZNSt18basic_stringstreamIcSt11char_traitsIcESaIcEEC1ESt13_Ios_Openmode
U _ZNSt18basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev

Now I did a:

my_host(my_user):/usr/local/lib> nm libstdc++.a | grep _ZNSt18basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev
00000000 T _ZNSt18basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev

my_host(my_user):/usr/local/lib> nm libstdc++.a | grep _ZNSt18basic_stringstreamIcSt11char_traitsIcESaIcEEC1ESt13>
00000000 T _ZNSt18basic_stringstreamIcSt11char_traitsIcESaIcEEC1ESt13_Ios_Openmode

The symbols are found. What do I missing ?
How can I further analyze the problem ?

Thomas