commit 1bd707aa2fd74a2eb18ba5fb5782361a94fd92e7
author Mara Sophie Grosch <littlefox@lf-net.org> Thu May 07 12:10:33 2020 -0400
committer Louis Dionne <ldionne@apple.com> Thu May 07 13:15:10 2020 -0400
tree e2a9ef991411e18fd8f1f1fe830ed994fab4b508
parent feb783e7b95c99244f741b5b8ba96282d90ca58a

[libc++] chrono: check _POSIX_TIMERS before using clock_gettime

clock_gettime is documented to be available when _POSIX_TIMERS is
defined. Add a check for this.

Differential Revision: https://reviews.llvm.org/D79305

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 59b3102739c5988c9fc7ea77888de1bc8ce9c8ab

src/chrono.cpp

diff --git a/src/chrono.cpp b/src/chrono.cpp
index 9e8a1b3..48c02c8 100644
--- a/src/chrono.cpp
+++ b/src/chrono.cpp
@@ -12,9 +12,13 @@
 #include <time.h>        // clock_gettime, CLOCK_MONOTONIC and CLOCK_REALTIME
 #include "include/apple_availability.h"
 
-#if !defined(__APPLE__)
+#if !defined(_WIN32)
+#include <unistd.h>
+#endif
+
+#if !defined(__APPLE__) && _POSIX_TIMERS > 0
 #define _LIBCPP_USE_CLOCK_GETTIME
-#endif // __APPLE__
+#endif
 
 #if defined(_LIBCPP_WIN32API)
 #define WIN32_LEAN_AND_MEAN