Use clock_gettime() on macOS 10.12.

diff --git a/configure b/configure
index 7dbccadf238b19e9190108782dd806a247d0fed7..d3569d0d04c27943da490a5d4531a65d0c15ecea 100755 (executable)
--- a/configure
+++ b/configure
@@ -877,6 +877,10 @@ print FILEHANDLE "#define MAXBUF " . ($config{MAXBUF}+2) . "\n";
                }
                if ($config{OSNAME} !~ /DARWIN/i) {
                        print FILEHANDLE "#define HAS_CLOCK_GETTIME\n";
+               } else {
+                       print FILEHANDLE "#ifdef MAC_OS_X_VERSION_10_12\n";
+                       print FILEHANDLE "# define HAS_CLOCK_GETTIME\n";
+                       print FILEHANDLE "#endif\n";
                }
                my $use_hiperf = 0;
                if (($has_kqueue) && ($config{USE_KQUEUE} eq "y")) {