Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/tests/cxx/t-cast.cc

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+/* Test g++ -Wold-style-cast cleanliness.
+
+Copyright 2003 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library test suite.
+
+The GNU MP Library test suite is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 3 of the License,
+or (at your option) any later version.
+
+The GNU MP Library test suite 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 a copy of the GNU General Public License along with
+the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
+
+#include "gmpxx.h"
+
+
+/* This code doesn't do anything when run, it just expands various C macros
+   to see that they don't trigger compile-time warnings from g++
+   -Wold-style-cast.  This option isn't used in a normal build, it has to be
+   added manually to make this test worthwhile.  */
+
+void
+check_macros (void)
+{
+  mpz_t          z;
+  long           l = 123;
+  unsigned long  u = 456;
+  int            i;
+  mp_limb_t      limb;
+
+  mpz_init_set_ui (z, 0L);
+  i = mpz_odd_p (z);
+  i = mpz_even_p (z);
+  i = mpz_cmp_si (z, l);
+  i = mpz_cmp_ui (z, u);
+  mpz_clear (z);
+
+  limb = GMP_NUMB_MASK;
+  limb = GMP_NUMB_MAX;
+  limb = GMP_NAIL_MASK;
+
+  mpn_divmod (&limb, &limb, 1, &limb, 1);
+  mpn_divexact_by3 (&limb, &limb, 1);
+}
+
+int
+main (void)
+{
+  return 0;
+}