Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/mpz/iset.c b/third_party/gmp/mpz/iset.c
new file mode 100644
index 0000000..252cada
--- /dev/null
+++ b/third_party/gmp/mpz/iset.c
@@ -0,0 +1,52 @@
+/* mpz_init_set (src_integer) -- Make a new multiple precision number with
+ a value copied from SRC_INTEGER.
+
+Copyright 1991, 1993, 1994, 1996, 2000-2002, 2012 Free Software Foundation,
+Inc.
+
+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 either:
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your
+ option) any later version.
+
+or
+
+ * the GNU General Public License as published by the Free Software
+ Foundation; either version 2 of the License, or (at your option) any
+ later version.
+
+or both in parallel, as here.
+
+The GNU MP Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library. If not,
+see https://www.gnu.org/licenses/. */
+
+#include "gmp-impl.h"
+
+void
+mpz_init_set (mpz_ptr w, mpz_srcptr u)
+{
+ mp_ptr wp, up;
+ mp_size_t usize, size;
+
+ usize = SIZ (u);
+ size = ABS (usize);
+
+ ALLOC (w) = MAX (size, 1);
+ wp = __GMP_ALLOCATE_FUNC_LIMBS (ALLOC (w));
+
+ PTR (w) = wp;
+ up = PTR (u);
+
+ MPN_COPY (wp, up, size);
+ SIZ (w) = usize;
+}