tests now compiling with clang++

tests/cksum_read.c

@@ -26,7 +26,7 @@ read_table(const char *table_fname, size_t *table_len)
       *table_len = (size_t)-1;
       return NULL;
     }
-  while (fscanf(tablefp, "%08"PRIx32" %d\n", &cksum_temp, &code) == 2)
+  while (fscanf(tablefp, "%08" PRIx32" %d\n", &cksum_temp, &code) == 2)
     {
       ENSURE_ARRAY_SIZE(table, table_size, table_used + 1);
       table[table_used].code = code;

tests/cksum_verify.c

@@ -45,7 +45,7 @@ main()
   uint32_t cksum_result = memcrc(test_data, num_blocks * block_size);
   if (cksum_result != UINT32_C(0xc47779cd))
     {
-      printf("unexpected crc result: 0x%8"PRIx32"\n", cksum_result);
+      printf("unexpected crc result: 0x%8" PRIx32"\n", cksum_result);
       return EXIT_FAILURE;
     }
   return EXIT_SUCCESS;

tests/test_cdf_write.c

@@ -144,7 +144,11 @@ static void
 compute_curvilinear(double *coords_,
                     const struct cart_coord a[4], size_t sizex, size_t sizey)
 {
+#ifdef __cplusplus
+  auto coords = (double (*)[sizey][sizex])coords_;
+#else
   double (*coords)[sizey][sizex] = (double (*)[sizey][sizex])coords_;
+#endif
   for (size_t j = 0; j < sizey; ++j)
     {
       double g = (double)j / (double)(sizey - 1);