When building a default (top level) build from git, it dies with the following messages:

[2357/3285] Compiling source3/lib/system_smbd.c
../source3/lib/events.c:22: fatal error: tevent_internal.h: No such file or directory
compilation terminated.
[2358/3285] Compiling source3/lib/audit.c
Waf: Leaving directory `/home/bradh-devel/openchange.git/samba4/bin'
Build failed:  -> task failed (err #1): 
        {task: cc events.c -> events_39.o}                                                                                                                                                                                                                                     
make: *** [all] Error 1
Error in samba4 make (error code 2)

This is the default openchange style build (where we build talloc, tdb, tevent, ldb as separate libs, then link against those). So tevent_private.h isn't available.

The problem is deeper than just an incorrect include - there is use of private structures and non-exported functions. So if we just use <tevent.h> instead of <tevent_internal.h>, we get:

../source3/lib/events.c: In function ‘tevent_get_poll_private’:
../source3/lib/events.c:43: error: dereferencing pointer to incomplete type
../source3/lib/events.c:46: error: dereferencing pointer to incomplete type
../source3/lib/events.c: In function ‘count_fds’:
../source3/lib/events.c:61: error: dereferencing pointer to incomplete type
../source3/lib/events.c:61: error: dereferencing pointer to incomplete type
../source3/lib/events.c:62: error: dereferencing pointer to incomplete type
../source3/lib/events.c:64: error: dereferencing pointer to incomplete type
../source3/lib/events.c:65: error: dereferencing pointer to incomplete type
../source3/lib/events.c: In function ‘event_add_to_poll_args’:
../source3/lib/events.c:131: error: dereferencing pointer to incomplete type
../source3/lib/events.c:131: error: dereferencing pointer to incomplete type
../source3/lib/events.c:134: error: dereferencing pointer to incomplete type
../source3/lib/events.c:138: error: dereferencing pointer to incomplete type
../source3/lib/events.c:142: error: dereferencing pointer to incomplete type
../source3/lib/events.c:149: error: dereferencing pointer to incomplete type
../source3/lib/events.c:152: error: dereferencing pointer to incomplete type
../source3/lib/events.c:154: error: dereferencing pointer to incomplete type
../source3/lib/events.c:157: error: dereferencing pointer to incomplete type
../source3/lib/events.c:164: error: dereferencing pointer to incomplete type
../source3/lib/events.c:168: error: dereferencing pointer to incomplete type
../source3/lib/events.c:174: error: dereferencing pointer to incomplete type
../source3/lib/events.c: In function ‘run_events_poll’:
../source3/lib/events.c:192: error: dereferencing pointer to incomplete type
../source3/lib/events.c:193: error: implicit declaration of function ‘tevent_common_check_signal’
../source3/lib/events.c:197: error: dereferencing pointer to incomplete type
../source3/lib/events.c:198: error: implicit declaration of function ‘tevent_common_loop_immediate’
../source3/lib/events.c:204: error: dereferencing pointer to incomplete type
../source3/lib/events.c:205: error: dereferencing pointer to incomplete type
../source3/lib/events.c:217: error: dereferencing pointer to incomplete type
../source3/lib/events.c:220: error: dereferencing pointer to incomplete type
../source3/lib/events.c:220: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:223: error: dereferencing pointer to incomplete type
../source3/lib/events.c:226: error: dereferencing pointer to incomplete type
../source3/lib/events.c:226: error: dereferencing pointer to incomplete type
../source3/lib/events.c:239: error: dereferencing pointer to incomplete type
../source3/lib/events.c:242: error: dereferencing pointer to incomplete type
../source3/lib/events.c:242: error: dereferencing pointer to incomplete type
../source3/lib/events.c:246: error: dereferencing pointer to incomplete type
../source3/lib/events.c:247: error: dereferencing pointer to incomplete type
../source3/lib/events.c:252: error: dereferencing pointer to incomplete type
../source3/lib/events.c:254: error: dereferencing pointer to incomplete type
../source3/lib/events.c:255: error: dereferencing pointer to incomplete type
../source3/lib/events.c:267: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:268: error: dereferencing pointer to incomplete type
../source3/lib/events.c:269: error: dereferencing pointer to incomplete type
../source3/lib/events.c:269: error: dereferencing pointer to incomplete type
../source3/lib/events.c: In function ‘get_timed_events_timeout’:
../source3/lib/events.c:282: error: dereferencing pointer to incomplete type
../source3/lib/events.c:282: error: dereferencing pointer to incomplete type
../source3/lib/events.c:285: error: dereferencing pointer to incomplete type
../source3/lib/events.c:291: error: dereferencing pointer to incomplete type
../source3/lib/events.c: In function ‘s3_event_loop_once’:
../source3/lib/events.c:326: error: implicit declaration of function ‘tevent_debug’
../source3/lib/events.c: In function ‘dump_event_list’:
../source3/lib/events.c:355: error: dereferencing pointer to incomplete type
../source3/lib/events.c:355: error: dereferencing pointer to incomplete type
../source3/lib/events.c:357: error: dereferencing pointer to incomplete type
../source3/lib/events.c:359: error: dereferencing pointer to incomplete type
../source3/lib/events.c:359: error: dereferencing pointer to incomplete type
../source3/lib/events.c:366: error: dereferencing pointer to incomplete type
../source3/lib/events.c:366: error: dereferencing pointer to incomplete type
../source3/lib/events.c:368: error: dereferencing pointer to incomplete type
../source3/lib/events.c:368: error: dereferencing pointer to incomplete type
../source3/lib/events.c: At top level:
../source3/lib/events.c:377: error: ‘tevent_common_add_fd’ undeclared here (not in a function)
../source3/lib/events.c:378: error: ‘tevent_common_fd_set_close_fn’ undeclared here (not in a function)
../source3/lib/events.c:379: error: ‘tevent_common_fd_get_flags’ undeclared here (not in a function)
../source3/lib/events.c:380: error: ‘tevent_common_fd_set_flags’ undeclared here (not in a function)
../source3/lib/events.c:381: error: ‘tevent_common_add_timer’ undeclared here (not in a function)
../source3/lib/events.c:382: error: ‘tevent_common_schedule_immediate’ undeclared here (not in a function)
../source3/lib/events.c:383: error: ‘tevent_common_add_signal’ undeclared here (not in a function)
../source3/lib/events.c:385: error: ‘tevent_common_loop_wait’ undeclared here (not in a function)
Waf: Leaving directory `/home/bradh-devel/openchange.git/samba4/bin'
Build failed:  -> task failed (err #1): 
        {task: cc events.c -> events_39.o}