Add quotes around macro value (Issue #2193) (#2197)

* Replaced ARDUINO_VARIANT with const char * Fixed missing return value * Added quotes around defined value in macro (Issue #2193)

Author: Bascy

libraries/ESPmDNS/src/ESPmDNS.cpp

@@ -43,6 +43,14 @@ License (MIT license):
 #include<functional>
 #include"esp_wifi.h"
 
+// Add quotes around defined value
+#ifdef __IN_ECLIPSE__
+#defineSTR_EXPAND(tok) #tok
+#defineSTR(tok) STR_EXPAND(tok)
+#else
+#defineSTR(tok) tok
+#endif
+
 staticvoid_on_sys_event(system_event_t *event){
 mdns_handle_system_event(NULL, event);
 }
@@ -82,7 +90,7 @@ void MDNSResponder::setInstanceName(String name) {
 
 voidMDNSResponder::enableArduino(uint16_t port, bool auth){
 mdns_txt_item_t arduTxtData[4] = {
- {(char*)"board" ,(char*)ARDUINO_VARIANT},
+ {(char*)"board" ,(char*)STR(ARDUINO_VARIANT)},
  {(char*)"tcp_check" ,(char*)"no"},
  {(char*)"ssh_upload" ,(char*)"no"},
  {(char*)"auth_upload" ,(char*)"no"}