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/tal-reent.c b/third_party/gmp/tal-reent.c
new file mode 100644
index 0000000..fb43e06
--- /dev/null
+++ b/third_party/gmp/tal-reent.c
@@ -0,0 +1,81 @@
+/* TMP_ALLOC routines using malloc in a reentrant fashion.
+
+Copyright 2000, 2001 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 <stdio.h>
+#include "gmp-impl.h"
+
+
+/* Each TMP_ALLOC uses __gmp_allocate_func to get a block of memory of the
+ size requested, plus a header at the start which is used to hold the
+ blocks on a linked list in the marker variable, ready for TMP_FREE to
+ release.
+
+ Callers should try to do multiple allocs with one call, in the style of
+ TMP_ALLOC_LIMBS_2 if it's easy to arrange, since that will keep down the
+ number of separate malloc calls.
+
+ Enhancements:
+
+ Could inline both TMP_ALLOC and TMP_FREE, though TMP_ALLOC would need the
+ compiler to have "inline" since it returns a value. The calls to malloc
+ will be slow though, so it hardly seems worth worrying about one extra
+ level of function call. */
+
+
+#define HSIZ ROUND_UP_MULTIPLE (sizeof (struct tmp_reentrant_t), __TMP_ALIGN)
+
+void *
+__gmp_tmp_reentrant_alloc (struct tmp_reentrant_t **markp, size_t size)
+{
+ char *p;
+ size_t total_size;
+
+#define P ((struct tmp_reentrant_t *) p)
+
+ total_size = size + HSIZ;
+ p = __GMP_ALLOCATE_FUNC_TYPE (total_size, char);
+ P->size = total_size;
+ P->next = *markp;
+ *markp = P;
+ return p + HSIZ;
+}
+
+void
+__gmp_tmp_reentrant_free (struct tmp_reentrant_t *mark)
+{
+ struct tmp_reentrant_t *next;
+
+ while (mark != NULL)
+ {
+ next = mark->next;
+ (*__gmp_free_func) ((char *) mark, mark->size);
+ mark = next;
+ }
+}