allow disabling global Serial and Serial1 object (#2807)

Palatis · devyte · commit 2b868aac0082 · 2017-12-29T11:11:00.000-03:00
allow the user to disable specific global `Serial` objects to save
memory.

that's 0x1c bytes per object.
diff --git a/cores/esp8266/HardwareSerial.cpp b/cores/esp8266/HardwareSerial.cpp
@@ -180,5 +180,10 @@ HardwareSerial::operator bool() const
 }
 
 
+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
 HardwareSerial Serial(UART0);
+#endif
+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL1)
 HardwareSerial Serial1(UART1);
+#endif
+

Original file line number	Diff line number	Diff line change
`@@ -180,5 +180,10 @@ HardwareSerial::operator bool() const`
`180`	`180`	`}`
`181`	`181`
`182`	`182`
	`183`	`+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)`
`183`	`184`	`HardwareSerial Serial(UART0);`
	`185`	`+#endif`
	`186`	`+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL1)`
`184`	`187`	`HardwareSerial Serial1(UART1);`
	`188`	`+#endif`
	`189`	`+`