v2.0.0-rc1

• IMPORTANT: Implementation language is now C++11. OS specific
  implementations have been replaced by C++11 facilities wherever
  possible. This lowers complexity of the library and improves
  maintainability but it also brings limitations to when the library can be
  used. Specifically, the library should not be used before main() is
  entered and after main() is left. Even more specifically, the library
  should not be used during global objects construction and destruction.

• log4cplus uses Catch unit testing framework and has unit tests.

• log4cplus supports IPv6.

• Autotools based build system is now partially generated from templates by
  the Autogen tool.

• Autotools based build system can build both wchar_t and plain char
  variants at once.
  link