From 50b8f574cfc8a6868f9fc74741c384f50e3ef540 Mon Sep 17 00:00:00 2001
From: Francesco Biscani <bluescarni@gmail.com>
Date: Sat, 21 Sep 2019 15:05:46 +0200
Subject: [PATCH 1/5] patch out the build issue on clang4 osx

---
 absl/time/internal/cctz/include/cctz/civil_time_detail.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
index 8aadde57..2dac15c1 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time_detail.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
@@ -15,6 +15,10 @@
 #ifndef ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_DETAIL_H_
 #define ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_DETAIL_H_
 
+#ifdef __APPLE__
+#define _DARWIN_C_SOURCE
+#endif
+
 #include <cstdint>
 #include <limits>
 #include <ostream>
-- 
2.37.0.windows.1