tools: usb: ffs-test: switch to _DEFAULT_SOURCE
_BSD_SOURCE is deprecated and gives a build warning. Let's use
_DEFAULT_SOURCE instead.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/tools/usb/ffs-test.c b/tools/usb/ffs-test.c
index 88d5e71..64fc72a 100644
--- a/tools/usb/ffs-test.c
+++ b/tools/usb/ffs-test.c
@@ -22,7 +22,7 @@
/* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */
-#define _BSD_SOURCE /* for endian.h */
+#define _DEFAULT_SOURCE /* for endian.h */
#include <endian.h>
#include <errno.h>