From c082eb7d8a6b089feb49ed734203223ade08f4d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Sat, 11 Jun 2022 17:39:36 +0300
Subject: [PATCH] mdbx: use `_tlv_atexit()` on Darwin/MacOSX.

---
 src/base.h |  3 +++
 src/core.c | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/base.h b/src/base.h
index 4482b71a..09f3133d 100644
--- a/src/base.h
+++ b/src/base.h
@@ -158,6 +158,9 @@
 #endif
 
 #ifdef __APPLE__
+#ifndef MAC_OS_X_VERSION_MIN_REQUIRED
+#define MAC_OS_X_VERSION_MIN_REQUIRED 1070 /* Mac OS X 10.7, 2011 */
+#endif
 #include <TargetConditionals.h>
 #endif /* Apple OSX & iOS */
 
diff --git a/src/core.c b/src/core.c
index f3db7435..6b4becfa 100644
--- a/src/core.c
+++ b/src/core.c
@@ -1259,6 +1259,23 @@ static __inline int rthc_atexit(void (*dtor)(void *), void *obj,
                                 void *dso_symbol) {
   int rc = MDBX_ENOSYS;
 
+#if defined(__APPLE__) || defined(_DARWIN_C_SOURCE)
+#if !defined(MAC_OS_X_VERSION_MIN_REQUIRED) || !defined(MAC_OS_X_VERSION_10_7)
+#error                                                                         \
+    "The <AvailabilityMacros.h> should be included and MAC_OS_X_VERSION_MIN_REQUIRED must be defined"
+#elif MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_7
+  extern void _tlv_atexit(void (*termfunc)(void *objAddr), void *objAddr)
+      __attribute__((__weak__, __weak_import__));
+  if (rc && &_tlv_atexit) {
+    (void)dso_symbol;
+    _tlv_atexit(dtor, obj);
+    rc = 0;
+  }
+#elif !defined(MDBX_HAVE_CXA_THREAD_ATEXIT)
+#define MDBX_HAVE_CXA_THREAD_ATEXIT 1
+#endif /* MAC_OS_X_VERSION_MIN_REQUIRED */
+#endif /* Apple */
+
 #if defined(MDBX_HAVE_CXA_THREAD_ATEXIT) && MDBX_HAVE_CXA_THREAD_ATEXIT
   extern int __cxa_thread_atexit(void (*dtor)(void *), void *obj,
                                  void *dso_symbol)