In file included from /code/illumos-gate/proto/root_i386/usr/include/iso/stdio_iso.h:53:0,
                 from /code/illumos-gate/proto/root_i386/usr/include/stdio.h:82,
                 from halt.c:52:
halt.c: In function 'main':
/code/illumos-gate/proto/root_i386/usr/include/sys/null.h:28:14: error: initialization makes integer from pointer without a cast [-Werror=int-conversion]
 #define NULL ((void *)0)
              ^
halt.c:1266:19: note: in expansion of macro 'NULL'
  uintptr_t mdep = NULL;
                   ^~~~
/code/illumos-gate/proto/root_i386/usr/include/sys/null.h:28:14: error: passing argument 3 of 'uadmin' makes integer from pointer without a cast [-Werror=int-conversion]
 #define NULL ((void *)0)
              ^
halt.c:1611:36: note: in expansion of macro 'NULL'
   (void) uadmin(A_DUMP, AD_NOSYNC, NULL);
                                    ^~~~
In file included from halt.c:58:0:
/code/illumos-gate/proto/root_i386/usr/include/sys/uadmin.h:165:12: note: expected 'uintptr_t {aka unsigned int}' but argument is of type 'void *'
 extern int uadmin(int, int, uintptr_t);
            ^~~~~~
cc1: all warnings being treated as errors