Add GMP compatibility defines and gmp_errno to MPIR

errno.c

@@ -10,7 +10,7 @@ This file is part of the GNU MP Library.
 
 The GNU MP Library is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 2.1 of the License, or (at your
+the Free Software Foundation; either version 3 of the License, or (at your
 option) any later version.
 
 The GNU MP Library is distributed in the hope that it will be useful, but
@@ -27,6 +27,7 @@ MA 02110-1301, USA. */
 #include "mpir.h"
 #include "gmp-impl.h"
 
+int gmp_errno = 0;
 
 /* The deliberate divide by zero triggers an exception on most systems.  On
    those where it doesn't, for example power and powerpc, use abort instead.

gmp-h.in

@@ -554,6 +554,9 @@ __GMP_DECLSPEC void mp_get_memory_functions __GMP_PROTO ((void *(**) (size_t),
 #define mp_bits_per_limb __gmp_bits_per_limb
 __GMP_DECLSPEC extern __gmp_const int mp_bits_per_limb;
 
+#define gmp_errno __gmp_errno
+__GMP_DECLSPEC extern int gmp_errno;
+
 #define gmp_version __gmp_version
 __GMP_DECLSPEC extern __gmp_const char * __gmp_const gmp_version;
 
@@ -2334,6 +2337,13 @@ __GMP_DECLSPEC_XX std::istream& operator>> (std::istream &, mpq_ptr);
 __GMP_DECLSPEC_XX std::istream& operator>> (std::istream &, mpf_ptr);
 #endif
 
+#define mpz_div		    mpz_fdiv_q
+#define mpz_divmod	    mpz_fdiv_qr
+#define mpz_div_ui	    mpz_fdiv_q_ui
+#define mpz_divmod_ui	mpz_fdiv_qr_ui
+#define mpz_div_2exp	mpz_fdiv_q_2exp
+#define mpz_mod_2exp	mpz_fdiv_r_2exp
+
 enum
 {
   GMP_ERROR_NONE = 0,