fix_library_loading.patch

From c983fc99112ad36c8d610db30a6174dee827c531 Mon Sep 17 00:00:00 2001
From: Jay Mundrawala <jdmundrawala@gmail.com>
Date: Sat, 7 May 2016 21:41:36 +0000
Subject: [PATCH] Fix library loading

find_library will return `None` if it cannot find the library,
and loading `None` means load the current executable. Since find_library
does not check `LD_LIBRARY_PATH`, there is no way to load a library
if it is not in the standard location.
---
 yubicommon/ctypes/libloader.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/yubicommon/ctypes/libloader.py b/yubicommon/ctypes/libloader.py
index e1f5d31..98cdf7f 100644
--- a/yubicommon/ctypes/libloader.py
+++ b/yubicommon/ctypes/libloader.py
@@ -163,7 +163,11 @@ class PosixLibraryLoader(LibraryLoader):
 
     def load_library(self, libname, version=None):
         try:
-            return self.load(ctypes.util.find_library(libname))
+            found_lib = ctypes.util.find_library(libname)
+            if found_lib == None:
+                return self.load(libname)
+            else:
+                return self.load(ctypes.util.find_library(libname))
         except ImportError:
             return super(PosixLibraryLoader, self).load_library(
                 libname, version)
-- 
2.8.0