[ fix ] missing LIBUSB_CALL definition

diff --git a/src/stlink-usb.c b/src/stlink-usb.c
index 20e5cd22e7bcc63b56c98024165e2396369216c0..72ffda17787439dfec7611b0efc7f0cf7aa62227 100644 (file)
--- a/src/stlink-usb.c
+++ b/src/stlink-usb.c
@@ -58,6 +58,10 @@ struct trans_ctx {
     volatile unsigned long flags;
 };
 
+#ifndef LIBUSB_CALL
+# define LIBUSB_CALL
+#endif
+
 static void LIBUSB_CALL on_trans_done(struct libusb_transfer * trans) {
     struct trans_ctx * const ctx = trans->user_data;