From af111712b99812c8ab7b7c61828acebc19a7993d Mon Sep 17 00:00:00 2001
From: Jeeyong Um <conr2d@gmail.com>
Date: Fri, 2 Aug 2019 01:21:03 +0000
Subject: [PATCH 1/4] add back std::time

---
 include/ctime | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/ctime b/include/ctime
index dbf707683..731c72be8 100644
--- a/include/ctime
+++ b/include/ctime
@@ -57,6 +57,7 @@ using ::size_t;
 using ::time_t;
 using ::tm;
 using ::difftime;
+using ::time;
 #ifndef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
 using ::asctime;
 using ::gmtime;

From 862fc60835513a86967752f7faad75b0a9ee5303 Mon Sep 17 00:00:00 2001
From: Jeeyong Um <conr2d@gmail.com>
Date: Fri, 2 Aug 2019 04:13:39 +0000
Subject: [PATCH 2/4] add back std::strftime

---
 src/locale.cpp | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/locale.cpp b/src/locale.cpp
index b59582980..8cba2c899 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -44,10 +44,6 @@
 #pragma clang diagnostic ignored "-Wsign-conversion"
 #endif
 
-extern "C" void eosio_assert(bool, const char*);
-size_t strftime(char*, size_t, const char*, const struct tm*) { eosio_assert(false, "strftime called"); }
-size_t strftime_l(char*, size_t, const char*, const struct tm*, locale_t) { eosio_assert(false, "strftime_l called"); }
-
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 struct __libcpp_unique_locale {

From 8cc53c00079aa3beecdabd32d2247fcf22021f32 Mon Sep 17 00:00:00 2001
From: Steven Watanabe <steven.watanabe@block.one>
Date: Fri, 8 Nov 2019 16:25:58 -0500
Subject: [PATCH 3/4] Cherry pick useful parts from fix/native_support

---
 include/__config | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/__config b/include/__config
index e62175de3..7b55ef3b2 100644
--- a/include/__config
+++ b/include/__config
@@ -19,7 +19,9 @@
 #define _LIBCPP_HAS_MUSL_LIBC
 
 // XXX
-#define __ELF__
+#ifndef __ELF__
+#define __ELF__ 1
+#endif
 
 #if defined(_MSC_VER) && !defined(__clang__)
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)

From 3ad8004cbb0ae6a564f31017bdb062618769caa2 Mon Sep 17 00:00:00 2001
From: Victor Camacho <victor.camacho@block.one>
Date: Wed, 5 Feb 2020 14:06:48 -0500
Subject: [PATCH 4/4] Add chrono.cpp definitions to support the creation of
 time point from iso string in cdt

---
 src/chrono.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/chrono.cpp

diff --git a/src/chrono.cpp b/src/chrono.cpp
new file mode 100644
index 000000000..c81379dcb
--- /dev/null
+++ b/src/chrono.cpp
@@ -0,0 +1,17 @@
+#include "chrono"
+#include "cerrno"
+#include <time.h>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace chrono
+{
+   system_clock::time_point
+
+   system_clock::from_time_t(time_t t) _NOEXCEPT
+   {
+      return system_clock::time_point(seconds(t));
+   }
+} // ns chrono
+
+_LIBCPP_END_NAMESPACE_STD
\ No newline at end of file