Found the following significant warnings:
  LLNfilt.c:107:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:108:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:109:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:110:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:111:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:372:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:518:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:621:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:956:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1141:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1194:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1298:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1343:30: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1378:27: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1444:31: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1453:31: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1467:31: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1496:31: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  LLNfilt.c:1504:31: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  MTAPSRC.c:35:21: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  MTAPSRC.c:55:5: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  MTAPSRC.c:433:21: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  MTAPSRC.c:940:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  MTAPSRC.c:1532:9: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  MTAPSRC.c:1855:9: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  jpiki.c:441:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/RSEIS.Rcheck/00install.out’ for details.