diff options
| -rw-r--r-- | lib/timeval.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/lib/timeval.c b/lib/timeval.c index f4bf83531..bcb571a7c 100644 --- a/lib/timeval.c +++ b/lib/timeval.c @@ -5,7 +5,7 @@ * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * - * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -60,7 +60,23 @@ struct curltime Curl_now(void) struct timeval now; struct curltime cnow; struct timespec tsnow; - if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) { + + /* + ** clock_gettime() may be defined by Apple's SDK as weak symbol thus + ** code compiles but fails during run-time if clock_gettime() is + ** called on unsupported OS version. + */ +#if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1) + bool have_clock_gettime = FALSE; + if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *)) + have_clock_gettime = TRUE; +#endif + + if( +#if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1) + have_clock_gettime && +#endif + (0 == clock_gettime(CLOCK_MONOTONIC, &tsnow))) { cnow.tv_sec = tsnow.tv_sec; cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000); } |