+# Check if we want to use monotonic clock
+TestBool("CONFIG_UCW_MONOTONIC_CLOCK", "Checking for monotonic clock", sub {
+ return Get("CONFIG_LINUX");
+});
+
+if (IsSet("CONFIG_DARWIN")) {
+ # Darwin does not support BSD regexes, fix up
+ if (!IsSet("CONFIG_UCW_POSIX_REGEX") && !IsSet("CONFIG_UCW_PCRE")) {
+ Set("CONFIG_UCW_POSIX_REGEX" => 1);
+ Warn "BSD regex library on Darwin isn't compatible, using POSIX regex.\n";
+ }
+
+ # Fill in some constants not found in the system header files
+ Set("SOL_TCP" => 6); # missing in /usr/include/netinet/tcp.h
+ if (IsGiven("CONFIG_UCW_DIRECT_IO") && IsSet("CONFIG_UCW_DIRECT_IO")) {
+ Fail("Direct I/O is not available on darwin");
+ } else {
+ UnSet("CONFIG_UCW_DIRECT_IO");
+ }
+}
+