Found the following significant warnings:
  ./../inst/include/RxODE.h:49:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./../inst/include/RxODE.h:299:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./../inst/include/RxODE.h:301:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./../inst/include/RxODE.h:303:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./../inst/include/RxODE.h:304:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./../inst/include/RxODE.h:312:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  call_dvode.c:21:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  call_dvode.c:24:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  call_dvode.c:34:39: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  call_dvode.c:47:25: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  call_dvode.c:55:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./tran.h:7:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./tran.h:287:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:27:31: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:57:35: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:73:40: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:92:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:121:32: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:146:31: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./genModelVars.h:340:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  genModelVars.c:5:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./codegen2.h:77:15: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./codegen2.h:290:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:104:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:114:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:244:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:292:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:415:37: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:551:39: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:618:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:629:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./parseSyntaxErrors.h:35:42: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./parseSyntaxErrors.h:290:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  tran.c:650:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  utilc.c:33:24: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  utilc.c:35:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:18:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:44:13: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:47:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:51:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:52:41: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:54:24: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:104:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:129:39: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:137:27: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:163:29: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:166:25: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:221:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:223:35: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:224:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:228:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:266:14: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:292:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:297:20: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:298:28: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:311:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:312:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:560:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:561:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  init.c:562:16: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./lsoda.h:43:42: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./lsoda.h:44:38: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  lsoda.c:897:42: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  lsoda.c:903:38: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  rxData.cpp:1254:15: warning: anonymous non-C-compatible type given name for linkage purposes by typedef declaration; add a tag name here [-Wnon-c-typedef-for-linkage]
  rxData.cpp:2343:15: warning: anonymous non-C-compatible type given name for linkage purposes by typedef declaration; add a tag name here [-Wnon-c-typedef-for-linkage]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/RxODE.Rcheck/00install.out' for details.