Found the following significant warnings:
  jack-n.c:203:20: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:206:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:219:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:220:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:259:20: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:260:26: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:303:20: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:327:26: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:890:20: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:937:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:1721:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  jack-n.c:1727:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  rk.c:48:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  so3_nc.c:22:13: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  so3_nc.c:116:13: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  wmain.c:197:13: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  wmain.c:204:24: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  wmain.c:224:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  wmain.c:606:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-clang/hgm.Rcheck/00install.out’ for details.