commit 4ebbde84d22ffd29d240a655a8320e7b4a6459b0
Author: Stefan Wallentowitz <stefan.wallentowitz@tum.de>
Date:   Tue May 19 17:48:24 2015 +0200

    or1k: Make heap end globally visible
    
    Boards may change the initial value from _end to another value.
    
           * or1k/sbrk.c: Make heap end globally visible

diff --git a/libgloss/or1k/sbrk.c b/libgloss/or1k/sbrk.c
index 5bd7044..0c3e66e 100644
--- a/libgloss/or1k/sbrk.c
+++ b/libgloss/or1k/sbrk.c
@@ -21,7 +21,7 @@
 
 extern uint32_t	end; /* Set by linker.  */
 uint32_t _or1k_heap_start = &end;
-static uint32_t _or1k_heap_end;
+uint32_t _or1k_heap_end;
 
 void *
 _sbrk_r (struct _reent * reent, ptrdiff_t incr)