The unwind-setjmp library offers a libunwind-based implementation of
 non-local gotos. This implementation is intended to be a drop-in
 replacement for the normal, system-provided routines of the same name.
 The main advantage of using the unwind-setjmp library is that setting
 up a non-local goto via one of the setjmp() routines is very fast.
 .
 This package includes the development support files