Found the following significant warnings:
  npmltc.cpp:70:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:71:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:81:13: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:91:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:104:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:109:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:110:14: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:118:25: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:121:32: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:127:25: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:128:28: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:131:34: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:155:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:158:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:162:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:165:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:166:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:198:10: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:212:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:213:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:227:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:229:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:235:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:236:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:252:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:255:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:259:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:262:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:263:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:267:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:268:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:277:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:279:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:285:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:286:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:298:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:304:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:391:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:405:19: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:521:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:523:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:526:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:527:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:529:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:530:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:532:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:533:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:563:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:565:17: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:615:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:621:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:625:19: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:671:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:673:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:742:10: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:830:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:831:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:832:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:833:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:843:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:845:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:846:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:852:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:855:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:856:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:861:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:866:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:868:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:873:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:874:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:876:12: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:880:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:888:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:889:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:912:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:916:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:917:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:922:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:950:8: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:953:11: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:959:14: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:962:10: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:970:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:973:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:974:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:976:16: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:980:13: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:987:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:988:9: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:992:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:998:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
  npmltc.cpp:1000:15: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/mixcat.Rcheck/00install.out’ for details.