illumos gate

Build errors with gcc 8:

    ../common/libpctx.c: In function 'pctx_set_events':
    ../common/libpctx.c:304:16: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  char *, void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  char *, void *)'} [-Werror=cast-function-type]
       pctx->exec = (pctx_sysc_execfn_t *)default_int;
                    ^
    ../common/libpctx.c:306:16: error: cast between incompatible function types from 'void (*)(pctx_t *)' {aka 'void (*)(struct __pctx *)'} to 'void (*)(pctx_t *, pid_t,  id_t,  pid_t,  void *)' {aka 'void (*)(struct __pctx *, long int,  long int,  long int,  void *)'} [-Werror=cast-function-type]
       pctx->fork = (pctx_sysc_forkfn_t *)default_void;
                    ^
    ../common/libpctx.c:308:16: error: cast between incompatible function types from 'void (*)(pctx_t *)' {aka 'void (*)(struct __pctx *)'} to 'void (*)(pctx_t *, pid_t,  id_t,  int,  void *)' {aka 'void (*)(struct __pctx *, long int,  long int,  int,  void *)'} [-Werror=cast-function-type]
       pctx->exit = (pctx_sysc_exitfn_t *)default_void;
                    ^
    ../common/libpctx.c:310:22: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
       pctx->lwp_create = (pctx_sysc_lwp_createfn_t *)default_int;
                          ^
    ../common/libpctx.c:312:20: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
       pctx->init_lwp = (pctx_init_lwpfn_t *)default_int;
                        ^
    ../common/libpctx.c:314:20: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
       pctx->fini_lwp = (pctx_fini_lwpfn_t *)default_int;
                        ^
    ../common/libpctx.c:316:20: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
       pctx->lwp_exit = (pctx_sysc_lwp_exitfn_t *)default_int;
                        ^
    ../common/libpctx.c:318:20: error: cast between incompatible function types from 'void (*)(pctx_t *)' {aka 'void (*)(struct __pctx *)'} to 'void (*)(pctx_t *, pid_t,  id_t,  pid_t,  void *)' {aka 'void (*)(struct __pctx *, long int,  long int,  long int,  void *)'} [-Werror=cast-function-type]
      if (pctx->fork != (pctx_sysc_forkfn_t *)default_void) {
                        ^
    ../common/libpctx.c:334:20: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  char *, void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  char *, void *)'} [-Werror=cast-function-type]
      if (pctx->exec != (pctx_sysc_execfn_t *)default_int ||
                        ^
    ../common/libpctx.c:335:24: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
          pctx->fini_lwp != (pctx_fini_lwpfn_t *)default_int ||
                            ^
    ../common/libpctx.c:336:24: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
          pctx->init_lwp != (pctx_init_lwpfn_t *)default_int) {
                            ^
    ../common/libpctx.c:345:26: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
          pctx->lwp_create != (pctx_sysc_lwp_createfn_t *)default_int ||
                              ^
    ../common/libpctx.c:346:24: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
          pctx->init_lwp != (pctx_init_lwpfn_t *)default_int);
                            ^
    ../common/libpctx.c:349:24: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
          pctx->lwp_exit != (pctx_sysc_lwp_exitfn_t *)default_int ||
                            ^
    ../common/libpctx.c:350:24: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
          pctx->fini_lwp != (pctx_fini_lwpfn_t *)default_int);
                            ^
    ../common/libpctx.c: In function 'pctx_lwpiterate':
    ../common/libpctx.c:410:16: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  void *)'} [-Werror=cast-function-type]
      if (action == (int (*)(pctx_t *, pid_t, id_t, void *))default_int)
                    ^
    ../common/libpctx.c: In function 'pctx_run':
    ../common/libpctx.c:725:23: error: cast between incompatible function types from 'int (*)(pctx_t *)' {aka 'int (*)(struct __pctx *)'} to 'int (*)(pctx_t *, pid_t,  id_t,  char *, void *)' {aka 'int (*)(struct __pctx *, long int,  long int,  char *, void *)'} [-Werror=cast-function-type]
         if (pctx->exec == (pctx_sysc_execfn_t *)
                           ^
    cc1: all warnings being treated as errors

Testing done: build/install/boot.