Found the following significant warnings:
  survivalBIV.c:8:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:34:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:80:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:131:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:182:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:228:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:279:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:325:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:351:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:391:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:437:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:479:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:530:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:581:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:630:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:679:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:724:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:769:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:812:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:850:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:901:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:943:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:996:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1038:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1105:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1152:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1189:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1227:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1264:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1302:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1371:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1410:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1458:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1536:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1575:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1623:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1667:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1711:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1768:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1825:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1879:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1926:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  survivalBIV.c:1973:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/survivalREC.Rcheck/00install.out' for details.