Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/printf/obprintf.c

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+/* gmp_obstack_printf -- formatted output to an obstack.
+
+Copyright 2001, 2002, 2018 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 "config.h"
+
+#if HAVE_OBSTACK_VPRINTF
+
+#include <stdarg.h>
+#include <obstack.h>
+#include <string.h>
+
+#include "gmp-impl.h"
+
+
+int
+gmp_obstack_printf (struct obstack *ob, const char *fmt, ...)
+{
+  va_list  ap;
+  int      ret;
+
+  va_start (ap, fmt);
+
+  ASSERT (! MEM_OVERLAP_P (obstack_base(ob), obstack_object_size(ob),
+                           fmt, strlen(fmt)+1));
+
+  ret = __gmp_doprnt (&__gmp_obstack_printf_funs, ob, fmt, ap);
+  va_end (ap);
+  return ret;
+}
+
+#else
+typedef int __gmp_dummy_typedef;
+#endif /* HAVE_OBSTACK_VPRINTF */