From 7fb1f78f6f219f58e56e420acea43773a007408d Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Thu, 8 Dec 2016 14:49:35 +0100
Subject: [PATCH] [libaxx] Define __cxa_atexit

In practice, it does nothing!

Change-Id: I5fb92299c4672d1635d0b77c2fc5de4e666c7213
---
 libaxx/Makefile              |  2 +-
 libaxx/src/cxxabi/atexit.cpp | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 libaxx/src/cxxabi/atexit.cpp

diff --git a/libaxx/Makefile b/libaxx/Makefile
index b4c97c60f..6911cbcb3 100644
--- a/libaxx/Makefile
+++ b/libaxx/Makefile
@@ -1,2 +1,2 @@
 objs += $(addprefix libaxx/src/, new.o)
-objs += $(addprefix libaxx/src/cxxabi/, pure_virtual.o)
+objs += $(addprefix libaxx/src/cxxabi/, atexit.o pure_virtual.o)
diff --git a/libaxx/src/cxxabi/atexit.cpp b/libaxx/src/cxxabi/atexit.cpp
new file mode 100644
index 000000000..ee32fc39c
--- /dev/null
+++ b/libaxx/src/cxxabi/atexit.cpp
@@ -0,0 +1,14 @@
+/* C++ expects the __dso_handle symbol to be defined to some unique value in
+ * each dynamic shared object. Even though we're not using dynamic loading,
+ * we still have to define __dso_handle. */
+
+void * __dso_handle = nullptr;
+
+/* The __cxa_atexit function registers a function to be called when the program
+ * exits or when a shared library is unloaded.
+ * We don't support shared libraries and our program should never exit, so we
+ * can simply do nothing and return zero. */
+
+extern "C" int __cxa_atexit(void (*dtor)(void *), void * object, void * handle) {
+  return 0;
+}