- Fix build on head with clang and libc++/libcxxrt. Note the patches were
heavily inspired by several upstream patches and a crucial hint from tijl.
- Remove a redundant compiler flag for MDDS. The GXX_INCLUDE_PATH variable
was removed with STLport support and it seems it is not necessary any more.
- Add an upstream patch. It may work around a potential compiler problem.
- Convert to new LIB_DEPENDS format.