KWSys 2017-09-21 (ff912e4d)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit ff912e4d39e0a580b9d9be5430fffa46c0e1f94d (master).

Upstream Shortlog
-----------------

Brad King (1):
      aa9f3a82 macOS: Account for deployment target when checking for utimensat

kwsysPlatformTestsCXX.cxx

@@ -265,6 +265,12 @@ int main()
 #ifdef TEST_KWSYS_CXX_HAS_UTIMENSAT
 #include <fcntl.h>
 #include <sys/stat.h>
+#if defined(__APPLE__)
+#include <AvailabilityMacros.h>
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 101300
+#error "utimensat not available on macOS < 10.13"
+#endif
+#endif
 int main()
 {
   struct timespec times[2] = { { 0, UTIME_OMIT }, { 0, UTIME_NOW } };