In file included from /code/illumos-gate/proto/root_i386/usr/include/iso/time_iso.h:49:0,
                 from /code/illumos-gate/proto/root_i386/usr/include/time.h:40,
                 from /code/illumos-gate/proto/root_i386/usr/include/sys/time.h:462,
                 from /code/illumos-gate/proto/root_i386/usr/include/sys/select.h:53,
                 from /code/illumos-gate/proto/root_i386/usr/include/sys/types.h:640,
                 from tip.h:20,
                 from vars.c:14:
/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)
              ^
vars.c:88:11: note: in expansion of macro 'NULL'
  { NOSTR, NULL, NULL, NOSTR, NOSTR }
           ^~~~
/code/illumos-gate/proto/root_i386/usr/include/sys/null.h:28:14: note: (near initialization for 'vtable[34].v_type')
 #define NULL ((void *)0)
              ^
vars.c:88:11: note: in expansion of macro 'NULL'
  { NOSTR, NULL, NULL, NOSTR, NOSTR }
           ^~~~
/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)
              ^
vars.c:88:17: note: in expansion of macro 'NULL'
  { NOSTR, NULL, NULL, NOSTR, NOSTR }
                 ^~~~
/code/illumos-gate/proto/root_i386/usr/include/sys/null.h:28:14: note: (near initialization for 'vtable[34].v_access')
 #define NULL ((void *)0)
              ^
vars.c:88:17: note: in expansion of macro 'NULL'
  { NOSTR, NULL, NULL, NOSTR, NOSTR }
                 ^~~~

tip.c: In function 'main':
tip.c:164:43: error: comparison between pointer and integer [-Werror]
  if ((i = speed(number(value(BAUDRATE)))) == NULL) {
                                           ^~
cc1: all warnings being treated as errors