fixes for Keil

Author: scaprile

mongoose.c

@@ -8912,7 +8912,7 @@ static void mg_set_non_blocking_mode(MG_SOCKET_TYPE fd) {
 void mg_multicast_add(struct mg_connection *c, char *ip);
 void mg_multicast_add(struct mg_connection *c, char *ip) {
 #if MG_ENABLE_RL
-#error UNSUPPORTED
+  MG_ERROR(("unsupported"));
 #elif MG_ENABLE_FREERTOS_TCP
   // TODO(): prvAllowIPPacketIPv4()
 #else

mongoose.h

@@ -285,6 +285,7 @@ extern "C" {
 #define mode_t size_t
 #include <alloca.h>
 #include <time.h>
+#define strdup(s) ((char *) mg_strdup(mg_str(s)).buf)
 #elif defined(__CCRH__)
 #else
 #include <sys/stat.h>

src/sock.c

@@ -181,7 +181,7 @@ static void mg_set_non_blocking_mode(MG_SOCKET_TYPE fd) {
 void mg_multicast_add(struct mg_connection *c, char *ip);
 void mg_multicast_add(struct mg_connection *c, char *ip) {
 #if MG_ENABLE_RL
-#error UNSUPPORTED
+  MG_ERROR(("unsupported"));
 #elif MG_ENABLE_FREERTOS_TCP
   // TODO(): prvAllowIPPacketIPv4()
 #else