Linux: fix build failure when CLOCK_MONOTONIC does not exist

This is not available on all platforms.

diff --git a/libusb/os/linux_usbfs.c b/libusb/os/linux_usbfs.c
index d0db7e2..96ae135 100644 (file)
--- a/libusb/os/linux_usbfs.c
+++ b/libusb/os/linux_usbfs.c
@@ -201,15 +201,16 @@ static clockid_t find_monotonic_clock(void)
        struct timespec ts;
        int r;
 
+#ifdef CLOCK_MONOTONIC
        /* Linux 2.6.28 adds CLOCK_MONOTONIC_RAW but we don't use it
         * because it's not available through timerfd */
        r = clock_gettime(CLOCK_MONOTONIC, &ts);
-       if (r == 0) {
+       if (r == 0)
                return CLOCK_MONOTONIC;
-       } else {
-               usbi_dbg("monotonic clock doesn't work, errno %d", errno);
-               return CLOCK_REALTIME;
-       }
+       usbi_dbg("monotonic clock doesn't work, errno %d", errno);
+#endif
+
+       return CLOCK_REALTIME;
 }
 
 /* bulk continuation URB flag available from Linux 2.6.32 */