From 7e62dad6dc12701d5633d1509451947e575f5f41 Mon Sep 17 00:00:00 2001
From: blockparty <hello@blockparty.sh>
Date: Thu, 21 Nov 2019 05:51:31 -0600
Subject: [PATCH] Check if features are defined

---
 toml/datetime.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/toml/datetime.hpp b/toml/datetime.hpp
index dc52396..371f93b 100644
--- a/toml/datetime.hpp
+++ b/toml/datetime.hpp
@@ -20,7 +20,7 @@ namespace toml
 namespace detail
 {
 // TODO: find more sophisticated way to handle this
-#if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE || _POSIX_SOURCE
+#if _POSIX_C_SOURCE >= 1 || defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_POSIX_SOURCE)
 inline std::tm localtime_s(const std::time_t* src)
 {
     std::tm dst;