diff -u -r ../elfutils-0.166/libdwfl/libdwflP.h ./libdwfl/libdwflP.h
--- ../elfutils-0.166/libdwfl/libdwflP.h	2016-01-12 07:49:19.000000000 -0500
+++ ./libdwfl/libdwflP.h	2016-05-04 13:21:07.997599838 -0400
@@ -771,5 +771,10 @@
 /* The default used by dwfl_standard_find_debuginfo.  */
 #define DEFAULT_DEBUGINFO_PATH ":.debug:/usr/lib/debug"
 
+ /* canonicalize_file_name GNU extension - http://man7.org/linux/man-pages/man3/canonicalize_file_name.3.html */
+inline static char* canonicalize_file_name(const char *path)
+{
+        return realpath(path, NULL);
+}
 
 #endif	/* libdwflP.h */