cannot compile

[Jens Hillenbach]

  Hi there. I'm quite a newbie to unix, successfully installed cygwin on 
my win98 and proceeded by installing gmp. However, something went 
utterly wrong and I don't know what. The little programm I wrote for 
testing purpuses, called test1.cpp follows:
#include <iostream.h>
#include <gmpxx.h>
using namespace std;

int main(void)
 {
   mpz_class N = "12345678901234567891234567890";
   cout << "N = " << N << endl;
   return 0;
 }

When calling g++, look what I get:

    $ g++ -o t1 test1.cpp -lgmpxx > g++_output
/cygdrive/c/WINDOWS/TEMP/ccmeb4uF.o(.__gmp_expr<__gmpz_value, 
__gmpz_value>::tex
t$(bool) +0x17):test1.cpp: undefined reference to `__gmpz_init_set_ui'
/cygdrive/c/WINDOWS/TEMP/ccmeb4uF.o(.text$_$_t10__gmp_expr2Z12__gmpz_valueZ12__g
mpz_value+0x13):test1.cpp: undefined reference to `__gmpz_clear'
/usr/local/lib/libgmpxx.a(osmpz.o): In function `_ls(ostream &, 
__mpz_struct con
st *)':
/Jens/gmp-4.0.1/cxx/osmpz.cc:38: undefined reference to `__gmpz_get_str'
/usr/local/lib/libgmpxx.a(osdoprnti.o): In function 
`$_20gmp_allocated_string':
/Jens/gmp-4.0.1/cxx/../gmp-impl.h:2503: undefined reference to 
`__gmp_allocate_func'
/Jens/gmp-4.0.1/cxx/../gmp-impl.h:2503: undefined reference to 
`__gmp_doprnt_integer'
/Jens/gmp-4.0.1/cxx/../gmp-impl.h:2503: undefined reference to 
`__gmp_asprintf_final'
/Jens/gmp-4.0.1/cxx/../gmp-impl.h:2503: undefined reference to 
`__gmp_free_func'
/Jens/gmp-4.0.1/cxx/../gmp-impl.h:2503: undefined reference to 
`__gmp_free_func'
/Jens/gmp-4.0.1/cxx/../gmp-impl.h:2503: undefined reference to 
`__gmp_free_func'
/usr/local/lib/libgmpxx.a(osfuns.o)(.text+0x4):osfuns.cc: undefined 
reference to `__gmp_asprintf_memory'
/usr/local/lib/libgmpxx.a(osfuns.o)(.text+0x8):osfuns.cc: undefined 
reference to  `__gmp_asprintf_reps'
collect2: ld returned 1 exit status

Similar things are written when compiling with gcc some c-program. Even 
telling explicitily where the libraries are to be found like
    g++ -I/usr/local/include -o p-1 p-1.cpp -L/usr/local/lib -lgmpxx
won't prevent the compiler, or linker, or whatever to write those nasty 
remarks.

If u experienced similiar problems and got rid of them (or simply know 
what's wrong) don't hesitate to tell me how. Please!

Thanks in advance, Jens