[Serial] Declare extern only if available

fpistm · fpistm · commit 2c99b524ea43 · 2020-12-04T10:42:38.000+01:00
Signed-off-by: Frederic Pillon &lt;frederic.pillon@st.com&gt;
diff --git a/cores/arduino/HardwareSerial.h b/cores/arduino/HardwareSerial.h
@@ -173,16 +173,38 @@ class HardwareSerial : public Stream {
     void configForLowPower(void);
 };
 
-extern HardwareSerial Serial1;
-extern HardwareSerial Serial2;
-extern HardwareSerial Serial3;
-extern HardwareSerial Serial4;
-extern HardwareSerial Serial5;
-extern HardwareSerial Serial6;
-extern HardwareSerial Serial7;
-extern HardwareSerial Serial8;
-extern HardwareSerial Serial9;
-extern HardwareSerial Serial10;
-extern HardwareSerial SerialLP1;
+#if defined(USART1)
+  extern HardwareSerial Serial1;
+#endif
+#if defined(USART2)
+  extern HardwareSerial Serial2;
+#endif
+#if defined(USART3)
+  extern HardwareSerial Serial3;
+#endif
+#if defined(UART4) || defined(USART4)
+  extern HardwareSerial Serial4;
+#endif
+#if defined(UART5) || defined(USART5)
+  extern HardwareSerial Serial5;
+#endif
+#if defined(USART6)
+  extern HardwareSerial Serial6;
+#endif
+#if defined(UART7) || defined(USART7)
+  extern HardwareSerial Serial7;
+#endif
+#if defined(UART8) || defined(USART8)
+  extern HardwareSerial Serial8;
+#endif
+#if defined(UART9)
+  extern HardwareSerial Serial9;
+#endif
+#if defined(UART10) || defined(USART10)
+  extern HardwareSerial Serial10;
+#endif
+#if defined(LPUART1)
+  extern HardwareSerial SerialLP1;
+#endif
 
 #endif
diff --git a/cores/arduino/WSerial.h b/cores/arduino/WSerial.h
@@ -169,17 +169,39 @@
     #endif
   #endif
 
-  extern void serialEvent1(void) __attribute__((weak));
-  extern void serialEvent2(void) __attribute__((weak));
-  extern void serialEvent3(void) __attribute__((weak));
-  extern void serialEvent4(void) __attribute__((weak));
-  extern void serialEvent5(void) __attribute__((weak));
-  extern void serialEvent6(void) __attribute__((weak));
-  extern void serialEvent7(void) __attribute__((weak));
-  extern void serialEvent8(void) __attribute__((weak));
-  extern void serialEvent9(void) __attribute__((weak));
-  extern void serialEvent10(void) __attribute__((weak));
-  extern void serialEventLP1(void) __attribute__((weak));
+  #if defined(HAVE_HWSERIAL1)
+    extern void serialEvent1(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL2)
+    extern void serialEvent2(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL3)
+    extern void serialEvent3(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL4)
+    extern void serialEvent4(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL5)
+    extern void serialEvent5(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL6)
+    extern void serialEvent6(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL7)
+    extern void serialEvent7(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL8)
+    extern void serialEvent8(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL9)
+    extern void serialEvent9(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIAL10)
+    extern void serialEvent10(void) __attribute__((weak));
+  #endif
+  #if defined(HAVE_HWSERIALLP1)
+    extern void serialEventLP1(void) __attribute__((weak));
+  #endif
 #endif /* HAL_UART_MODULE_ENABLED  && !HAL_UART_MODULE_ONLY */
 
 extern void serialEventRun(void);
