[U(S)ART] Add missing HAL_UART_MODULE_ENABLED guard

fpistm · fpistm · commit 98efbe71d25d · 2018-07-30T14:04:02.000+02:00
If printf() function is used and HAL_UART_MODULE_ENABLED is disabled
uart_debug_write() is not defined.
Instead return len.

Signed-off-by: Frederic.Pillon &lt;frederic.pillon@st.com&gt;
diff --git a/cores/arduino/syscalls_stm32.c b/cores/arduino/syscalls_stm32.c
@@ -75,7 +75,12 @@ int _read( UNUSED(int file), UNUSED(char *ptr), UNUSED(int len) ) {
 
 __attribute__((weak))
 int _write( UNUSED(int file), char *ptr, int len ) {
+#ifdef HAL_UART_MODULE_ENABLED
   return uart_debug_write((uint8_t *)ptr, (uint32_t)len);
+#else
+  (void)ptr;
+  return len;
+#endif
 }
 
 __attribute__((weak))
