Found the following significant warnings:
  ecIndepTest.c:26:13: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:59:28: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:60:29: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:134:16: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:134:32: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:172:18: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:173:19: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:193:25: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:194:26: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:196:28: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ecIndepTest.c:197:29: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multIndepTest.c:157:18: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multIndepTest.c:158:19: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multIndepTest.c:179:25: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multIndepTest.c:180:26: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multIndepTest.c:210:16: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multIndepTest.c:210:32: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multSerialIndepTest.c:165:25: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multSerialIndepTest.c:166:26: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multSerialIndepTest.c:194:16: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  multSerialIndepTest.c:194:32: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:25:12: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:59:28: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:60:29: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:136:16: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:136:32: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:175:25: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:176:26: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:178:27: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  serialIndepTest.c:179:28: warning: invalid UTF-8 in comment [-Winvalid-utf8]
See ‘/data/gannet/ripley/R/packages/tests-clang/copula.Rcheck/00install.out’ for details.