Found the following significant warnings:
  ./libswe/swephlib.h:120:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./libswe/swephlib.h:130:34: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swejpl.c:949:24: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swemmoon.c:1183:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swemmoon.c:1368:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swemmoon.c:1445:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swemmoon.c:1459:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swemmoon.c:1764:26: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swemmoon.c:1821:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./libswe/swepcalc.h:120:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swepcalc.c:373:26: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/sweph.c:7099:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swephlib.c:3001:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  libswe/swephlib.c:3033:26: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-clang/swephR.Rcheck/00install.out’ for details.