[ruby-cvs:78522] f4d9daf2b6 (master): coroutine/ucontext/Context.c: define __EXTENSIONS__ explicitly

Yusuke Endoh	2019-12-05 22:24:58 +0900 (Thu, 05 Dec 2019)

  New Revision: f4d9daf2b6

  https://github.com/ruby/ruby/commit/f4d9daf2b6

  Log:
    coroutine/ucontext/Context.c: define __EXTENSIONS__ explicitly
    
    instead of ruby/config.h, per samuel's request.
    
    https://github.com/ruby/ruby/commit/dbfd4b780e3914a3f27e92c2248254452bf0fd6b#diff-7fd78c3cc8a19b7e0637502983ec26ff

  Modified files:
    coroutine/ucontext/Context.c