fix compiling/running tests on win32

- new files
- different warning settings
- all tests run in a single process (no fork)

test/unit/core/test_dns.c

@@ -18,10 +18,11 @@ dns_teardown(void)
 
 START_TEST(test_dns_set_get_server)
 {
-  int i;
+  int n;
   LWIP_UNUSED_ARG(_i);
 
-  for (i = 0; i < 256; i++) {
+  for (n = 0; n < 256; n++) {
+    u8_t i = (u8_t)n;
     ip_addr_t server;
     /* Should return a zeroed address for any index */
     fail_unless(dns_getserver(i));

test/unit/core/test_pbuf.c

@@ -99,9 +99,11 @@ END_TEST
 /** Call pbuf_copy on pbufs with chains of different sizes */
 START_TEST(test_pbuf_copy_unmatched_chains)
 {
-  int i, j;
+  uint16_t i, j;
   err_t err;
   struct pbuf *source, *dest, *p;
+  LWIP_UNUSED_ARG(_i);
+
   source = NULL;
   /* Build source pbuf from linked 16 byte parts,
    * with payload bytes containing their offset */
@@ -109,7 +111,7 @@ START_TEST(test_pbuf_copy_unmatched_chains)
     p = pbuf_alloc(PBUF_RAW, 16, PBUF_RAM);
     fail_unless(p != NULL);
     for (j = 0; j < p->len; j++) {
-        ((unsigned char*)p->payload)[j] = (i << 4) | j;
+        ((u8_t*)p->payload)[j] = (u8_t)((i << 4) | j);
     }
     if (source) {
         pbuf_cat(source, p);