add workaround for NULL __dso_handle

recipes/rust/files/0020-std-thread_local-workaround-for-NULL-__dso_handle.patch

@@ -0,0 +1,25 @@
+From 4003a6e93e558fb327879b1d500bdbaa85ae06ae Mon Sep 17 00:00:00 2001
+From: Cody P Schafer <dev@codyps.com>
+Date: Wed, 3 Dec 2014 19:15:19 -0500
+Subject: [PATCH] std/thread_local: workaround for NULL __dso_handle
+
+---
+ src/libstd/thread_local/mod.rs | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/libstd/thread_local/mod.rs b/src/libstd/thread_local/mod.rs
+index e2e8461..2bf891e 100644
+--- a/src/libstd/thread_local/mod.rs
++++ b/src/libstd/thread_local/mod.rs
+@@ -308,7 +308,7 @@ mod imp {
+             #[linkage = "extern_weak"]
+             static __cxa_thread_atexit_impl: *const ();
+         }
+-        if !__cxa_thread_atexit_impl.is_null() {
++        if !__cxa_thread_atexit_impl.is_null() && !__dso_handle.is_null() {
+             type F = unsafe extern fn(dtor: unsafe extern fn(*mut u8),
+                                       arg: *mut u8,
+                                       dso_handle: *mut u8) -> libc::c_int;
+-- 
+2.1.3
+

recipes/rust/rust_0.12.0+2014-12-02.bb

@@ -13,4 +13,5 @@ SRC_URI_append = "\
 	file://0009-XXX-remove-conflicting-realpath-hack.patch \
 	file://0010-XXX-configure-unneeded-windows-check.patch \
 	file://0011-Parallelize-submake-invocations.patch \
+	file://0020-std-thread_local-workaround-for-NULL-__dso_handle.patch \
 "