./gtype-cp.h:410:7: warning: switch condition has boolean value
      switch (((*x).u).h.is_lang_type_class)
      ^       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./gtype-cp.h:412:14: warning: overflow converting case value to switch condition type (2 to 0) [-Wswitch]
        case 2:
             ^
./gtype-cp.h:431:14: error: duplicate case value '0'
        case 0:
             ^
./gtype-cp.h:412:14: note: previous case defined here
        case 2:
             ^
mv -f Tcollect2 collect2
./gtype-cp.h:857:7: warning: switch condition has boolean value
      switch (((*x).u).h.is_lang_type_class)
      ^       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./gtype-cp.h:859:14: warning: overflow converting case value to switch condition type (2 to 0) [-Wswitch]
        case 2:
             ^
./gtype-cp.h:879:14: error: duplicate case value '0'
        case 0:
             ^
./gtype-cp.h:859:14: note: previous case defined here
        case 2:
             ^
./gtype-cp.h:1475:3: warning: switch condition has boolean value
  switch (((*x).u).h.is_lang_type_class)
  ^       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./gtype-cp.h:1477:10: warning: overflow converting case value to switch condition type (2 to 0) [-Wswitch]
    case 2:
         ^
./gtype-cp.h:1511:10: error: duplicate case value '0'
    case 0: