Add missing s6_addr16 define for MacOSX targets

Summary:
This is a known issue on Darwin

@override-unit-failures

Test Plan: folly/detail/IPAddress.h compiles on a mac

Reviewed By: joelm@fb.com

FB internal diff: D1499795

diff --git a/folly/detail/IPAddress.h b/folly/detail/IPAddress.h
index 65b42afa6d48ddc02f55610d49f47b510acf8c14..18d53a646f5ac14ff13385cda9afb7f1793ae6bd 100644 (file)
--- a/folly/detail/IPAddress.h
+++ b/folly/detail/IPAddress.h
@@ -45,6 +45,10 @@ extern "C" {
 #include <folly/Conv.h>
 #include <folly/Format.h>
 
+#if defined(__APPLE__) && !defined(s6_addr16)
+# define s6_addr16 __u6_addr.__u6_addr16
+#endif
+
 namespace folly { namespace detail {
 
 inline std::string familyNameStr(sa_family_t family) {