illumos gate

Build errors with gcc 8:

    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:104:8: note: in expansion of macro 'C'
      "?",  C help,  M|NOLIST, 0, 0,
            ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:107:11: note: in expansion of macro 'C'
      "help",  C help,  M|NOLIST, 0, 0,
               ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:108:8: note: in expansion of macro 'C'
      "=",  C pdot,  NOLIST,  0, 0,
            ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(int)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:117:11: note: in expansion of macro 'C'
      "quit",  C edstop, NOLIST,  0, 0,
               ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:118:11: note: in expansion of macro 'C'
      "list",  C pcmdlist, M|NOLIST, 0, 0,
               ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(int)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:120:10: note: in expansion of macro 'C'
      "xit",  C rexit, M|NOLIST, 0, 0,
              ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(int)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:121:11: note: in expansion of macro 'C'
      "exit",  C rexit, M|NOLIST, 0, 0,
               ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:125:11: note: in expansion of macro 'C'
      "else",  C elsecmd, F|M|RAWLIST, 0, 0,
               ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:126:11: note: in expansion of macro 'C'
      "endif", C endifcmd, F|M|RAWLIST, 0, 0,
               ^
    cmdtab.c:54:11: error: cast between incompatible function types from 'int (*)(void)' to 'int (*)(void *)' [-Werror=cast-function-type]
     #define C (int (*)(void *))
               ^
    cmdtab.c:138:10: note: in expansion of macro 'C'
      "inc",  C inc,  T|NOLIST, 0, 0,
              ^

    lex.c:521:21: error: cast between incompatible function types from 'int (*)(int)' to 'int (*)(void *)' [-Werror=cast-function-type]
      if (com->c_func == (int (*)(void *))edstop) {
                         ^
    lex.c:671:21: error: cast between incompatible function types from 'int (*)(int)' to 'int (*)(void *)' [-Werror=cast-function-type]
      if (com->c_func == (int (*)(void *))edstop)
                         ^

    cc1: all warnings being treated as errors

Testing done: build/install/boot