X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/99145a8d7c88d9af065cfb7f5e8507d5b65ff811..663f449c10b9a77a429aaa81066ce2b43ca6dc39:/Bootloaders/CDC/BootloaderCDC.h

diff --git a/Bootloaders/CDC/BootloaderCDC.h b/Bootloaders/CDC/BootloaderCDC.h
index a6e77550c..7669b836c 100644
--- a/Bootloaders/CDC/BootloaderCDC.h
+++ b/Bootloaders/CDC/BootloaderCDC.h
@@ -41,12 +41,18 @@
 		#include <avr/wdt.h>
 		#include <avr/boot.h>
 		#include <avr/eeprom.h>
+		#include <avr/power.h>
 		#include <stdbool.h>
 
 		#include "Descriptors.h"
 
 		#include <LUFA/Drivers/USB/USB.h>                // USB Functionality
 
+	/* Preprocessor Checks: */
+		#if !defined(SIGNATURE_0) || !defined(SIGNATURE_1) || !defined(SIGNATURE_2)
+			#error Device signature byte constants are not defined due to outdated avr-libc version. See demo documentation.
+		#endif
+
 	/* Macros: */
 		/** CDC Class Specific request to get the line encoding on a CDC-ACM virtual serial port, including the
 		 *  baud rate, parity, stop bits and data bits.