GMP and DJGPP

[Chris Johnstone]

Hey fellow GMPers,

I'm using the DJGPP build of GMP 4.01.

I'm trying to get this program to compile with gpp:

compile line: gcc -o main.exe test.c -lgmp
-----
program: test.c

#include <gmpxx.h>
#include <iostream>

using namespace std;

int
main (void)
{
  mpz_class a, b, c;

  a = 1234;
  b = "-5678";
  c = a+b;
  cout << "sum is " << c << "\n";
  cout << "absolute value is " << abs(c) << "\n";
  return 0;
}
--
result:
c:/djgpp/tmp\ccMJ9X6m.o(.gnu.linkonce.t._ZlsI16__gmp_unary_exprI10__gmp_exprI12__gmpz_valueS2_E18__gmp_abs_functionEERSoS6_RKS1_IS2_T_E+0x30):test.c:
undefined reference to `operator<<(std::ostream&,
__mpz_struct const*)'
c:/djgpp/tmp\ccMJ9X6m.o(.gnu.linkonce.t._ZlsRSoRK10__gmp_exprI12__gmpz_valueS1_E+0x1c):test.c:
undefined reference to `operator<<(std::ostream&,
__mpz_struct const*)'

Does the C++ half of GMP not work for DJGPP, or am I
missing something obvious?

Chris Johnstone

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