Found the following significant warnings:
  fork.c:100:12: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  fork.c:187:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:17:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:26:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:35:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:44:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:53:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:57:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:61:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  process.c:70:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:9:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:10:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:14:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:15:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:16:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:17:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:18:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:19:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:20:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:21:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:23:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  register.c:34:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlimit.c:52:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  util.c:48:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  util.c:56:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  util.c:113:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  util.c:121:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-devel/unix.Rcheck/00install.out’ for details.