From 2de5743add75ae90442e9ff47061a67ff65e76d1 Mon Sep 17 00:00:00 2001
From: Jonathan Yong <10walls@gmail.com>
Date: Thu, 30 Oct 2014 17:15:02 +0800
Subject: [PATCH 17/21] __cxa-atexit for Cygwin

---
 gcc/config.gcc                        | 2 ++
 libgcc/config/i386/cygming-crtbegin.c | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 75807f5..aa5c032 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1655,6 +1655,7 @@ i[34567]86-*-cygwin*)
 	fi
 	default_use_cxa_atexit=yes
 	use_gcc_stdint=wrap
+	default_use_cxa_atexit=yes
 	;;
 x86_64-*-cygwin*)
 	need_64bit_isa=yes
@@ -1964,6 +1965,7 @@ mep-*-*)
 		with_headers=yes
 	fi
 	use_gcc_stdint=wrap
+	default_use_cxa_atexit=yes
 	;;
 microblaze*-linux*)
 	case $target in
diff --git a/libgcc/config/i386/cygming-crtbegin.c b/libgcc/config/i386/cygming-crtbegin.c
index 87928e5..90904cd 100644
--- a/libgcc/config/i386/cygming-crtbegin.c
+++ b/libgcc/config/i386/cygming-crtbegin.c
@@ -183,7 +183,11 @@ __gcc_register_frame (void)
   /* If we use the __cxa_atexit method to register C++ dtors
      at object construction,  also use atexit to register eh frame
      info cleanup.  */
+#ifdef __CYGWIN__
+  __cxa_atexit(__gcc_deregister_frame, NULL, (void *)&__dso_handle);
+#else
   atexit(__gcc_deregister_frame);
+#endif /* __CYGWIN__ */
 #endif /* DEFAULT_USE_CXA_ATEXIT */
 }
 
-- 
2.4.5