Found the following significant warnings:
  ./exception.h:5:19: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./exception.h:5:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./exception.h:5:25: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:2:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:2:44: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:4:52: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:4:58: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:4:60: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:6:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:37:61: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:71:63: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:85:14: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outils.h:85:53: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:2:12: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:5:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:47:40: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:47:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:48:47: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:48:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:72:11: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:130:13: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:130:15: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:136:61: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:168:46: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:192:47: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:199:53: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:233:40: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:233:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:234:47: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:234:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:237:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:237:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:237:58: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:273:22: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:310:22: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:321:13: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:321:15: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:324:18: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:324:20: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./hashtable.h:324:45: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./userInterface.h:23:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./userInterface.h:23:74: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./userInterface.h:23:79: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:4:38: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:4:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:4:64: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:4:66: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:6:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:7:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:74:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:76:54: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:76:56: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:77:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:77:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:79:76: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:79:78: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:80:33: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:80:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:82:101: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:92:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:92:48: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:94:44: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:94:70: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:94:79: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:94:81: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:94:92: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:94:100: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:151:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:153:54: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:153:56: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:154:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:154:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:156:76: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:156:78: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:157:33: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:157:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:158:32: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:160:101: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:170:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:170:48: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:172:44: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:172:70: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:172:79: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:172:81: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:172:92: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:172:100: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:225:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:227:54: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:227:56: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:228:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:228:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:230:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:230:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:231:33: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:231:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:244:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:244:48: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:322:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:324:54: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:324:56: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:325:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:325:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:327:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:327:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:328:33: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:328:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:343:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:343:48: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:428:29: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:428:31: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:459:29: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  congen.cpp:459:31: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./consanguinite.h:4:66: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./consanguinite.h:6:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./consanguinite.h:7:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./cbignum.h:8:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./cbignum.h:9:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./probsimul.h:4:6: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./probsimul.h:4:13: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./probsimul.h:6:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpajout.c:4:9: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpajout.c:16:29: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpajout.c:16:65: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpajout.c:51:51: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpajout.c:51:53: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpi.c:246:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpi.c:254:32: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpi.c:450:33: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  mpi.c:450:68: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./congen.h:4:68: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./congen.h:4:70: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./congen.h:6:10: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./congen.h:7:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:11:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:11:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:11:66: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:11:68: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:25:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:26:46: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:28:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:29:58: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:29:61: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  ./outilanal.h:30:49: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:30:31: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:30:62: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:56:43: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:80:19: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:80:22: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:82:23: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:82:69: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:84:43: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:98:58: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:98:68: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:110:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:112:63: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:132:34: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:132:40: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:134:18: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:134:52: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:136:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:136:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:136:52: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  outilanal.cpp:136:61: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:28:24: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:48:64: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:48:91: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:48:93: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:54:61: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:54:89: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:54:91: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:63:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:63:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:64:45: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:64:53: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:64:55: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:87:35: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:87:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:88:45: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:88:53: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:88:55: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:8: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:33: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:40: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:42: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:75: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:79: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:110:81: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:3: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:5: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:22: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:56: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:66: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:68: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:111:82: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:112:9: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:112:14: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:116:53: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:116:61: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:122:37: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:122:48: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:124:39: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:124:47: warning: invalid UTF-8 in comment [-Winvalid-utf8]
  statanal.cpp:125:12: warning: invalid UTF-8 in comment [-Winvalid-utf8]
See ‘/data/gannet/ripley/R/packages/tests-clang/GENLIB.Rcheck/00install.out’ for details.