Found the following significant warnings:
  ./adssub.h:6:10: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  adssub.c:4:10: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  triangulate.c:46:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:66:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  triangulate.c:73:29: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  triangulate.c:79:15: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:101:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:159:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:224:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:297:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:584:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:679:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:838:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  triangulate.c:917:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:930:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:945:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  triangulate.c:957:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  triangulate.c:975:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:997:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1018:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1031:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1038:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1050:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1076:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1158:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1216:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1230:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1292:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1373:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1947:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1965:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:1998:12: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:2035:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  triangulate.c:2107:5: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/ads.Rcheck/00install.out' for details.