2.38.1 (stable):

* Fix the build with C++11 compilers, such as MS Visual C++ 2013 - Implicit
  conversions from streams to bool are no longer allowed.)
  (Mikhail Titov)
* Build: Disable deprecated API in dependencies if --enable-warnings=fatal
  (Kjell Ahlstedt)
* Build: Require libxml2 2.7.7 or later
  (Kjell Ahlstedt)