fix warning

include/starpu_util.h

@@ -125,7 +125,7 @@ extern "C"
 
 #  endif
 #  define STARPU_ASSERT_ACCESSIBLE(ptr)	do { \
-	volatile char c = *(char*) (ptr); \
+	volatile char c STARPU_ATTRIBUTE_UNUSED = *(char*) (ptr); \
 } while(0)
 #endif
 

src/common/fxt.c

@@ -220,7 +220,7 @@ void _starpu_fxt_register_thread(unsigned cpuid)
 
 #else // STARPU_USE_FXT
 
-void starpu_fxt_autostart_profiling(int autostart)
+void starpu_fxt_autostart_profiling(int autostart STARPU_ATTRIBUTE_UNUSED)
 {
 }