X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fstlink-usb.c;h=d945f66ecc391abf500160c9de78a507d57dcf7d;hb=691e9af28da2e1178353a5c016c478e508a04f19;hp=8f5c6c410c46420166f817bab8e781db8bc64d62;hpb=087a3596c3f22599867411fafb79fdfb3f48097c;p=fw%2Fstlink

diff --git a/src/stlink-usb.c b/src/stlink-usb.c
index 8f5c6c4..d945f66 100644
--- a/src/stlink-usb.c
+++ b/src/stlink-usb.c
@@ -16,6 +16,18 @@
 #define WLOG(format, args...)         ugly_log(UWARN, LOG_TAG, format, ## args)
 #define fatal(format, args...)        ugly_log(UFATAL, LOG_TAG, format, ## args)
 
+#ifndef timersub
+/* This is a copy from GNU C Library (GNU LGPL 2.1), sys/time.h. */
+# define timersub(a, b, result)                                               \
+  do {                                                                        \
+    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
+    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
+    if ((result)->tv_usec < 0) {                                              \
+      --(result)->tv_sec;                                                     \
+      (result)->tv_usec += 1000000;                                           \
+    }                                                                         \
+  } while (0)
+#endif
 
 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};