AP_HAL: added WARN_IF_UNUSED macro

useful for key functions
12 years ago · 90523ae975
1 changed files with 6 additions and 0 deletions
--- a/libraries/AP_HAL/AP_HAL.h
+++ b/libraries/AP_HAL/AP_HAL.h
@ -8,6 +8,12 @@
				@@ -8,6 +8,12 @@
 #include "AP_HAL_Namespace.h"
 #include "AP_HAL_Boards.h"

+#ifdef __GNUC__
+ #define WARN_IF_UNUSED __attribute__ ((warn_unused_result))
+#else
+ #define WARN_IF_UNUSED
+#endif
+
 /* HAL Module Classes (all pure virtual) */
 #include "UARTDriver.h"
 #include "I2CDriver.h"