graphics/wayland: switch to devel/libepoll-shim

[jbeich]

libepoll-shim upstream claims to support all BSDs nowadays. Given DragonFly supports many apps from wlroots ecosystem the coverage should be good. If graphics/weston breaks maybe adapt some fixes from a FreeBSD fork.

Inspired by https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/120

[tuxillo]

@jbeich not true unless they don't include DragonFly in the "all BSDs" definition:

antonioh@devbox:~/s/epoll-shim/build$ cmake --build .
Scanning dependencies of target epoll-shim
[  3%] Building C object src/CMakeFiles/epoll-shim.dir/epoll_shim_ctx.c.o
<command-line>: error: two or more data types in declaration specifiers
In file included from /home/antonioh/s/epoll-shim/src/epoll_shim_ctx.h:4,
                 from /home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c:1:
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c: In function 'fd_context_map__RB_REMOVE':
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c:85:1: error: dereferencing pointer to incomplete type 'struct fd_context_map__scan_info'
 RB_GENERATE_STATIC(fd_context_map_, fd_context_map_node_, entry,
 ^~~~~~~~~~~~~~~~~~
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c:85:20: warning: implicit declaration of function 'fd_context_map__RB_NEXT'; did you mean 'fd_context_map__RB_REMOVE'? [-Wimplicit-function-declaration]
 RB_GENERATE_STATIC(fd_context_map_, fd_context_map_node_, entry,
                    ^~~~~~~~~~~~~~~
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c: In function '_fd_context_map__RB_SCAN':
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c:85:1: error: storage size of 'info' isn't known
 RB_GENERATE_STATIC(fd_context_map_, fd_context_map_node_, entry,
 ^~~~~~~~~~~~~~~~~~
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c: At top level:
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c:85:20: error: conflicting types for 'fd_context_map__RB_NEXT'
 RB_GENERATE_STATIC(fd_context_map_, fd_context_map_node_, entry,
                    ^~~~~~~~~~~~~~~
/home/antonioh/s/epoll-shim/src/epoll_shim_ctx.c:85:20: note: previous implicit declaration of 'fd_context_map__RB_NEXT' was here
 RB_GENERATE_STATIC(fd_context_map_, fd_context_map_node_, entry,
                    ^~~~~~~~~~~~~~~
gmake[2]: *** [src/CMakeFiles/epoll-shim.dir/build.make:82: src/CMakeFiles/epoll-shim.dir/epoll_shim_ctx.c.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:932: src/CMakeFiles/epoll-shim.dir/all] Error 2
gmake: *** [Makefile:160: all] Error 2

[jbeich]

@tuxillo, can you re-try with more recent snapshot? See jiixyj/epoll-shim@e499ec0c93b0

[tuxillo]

You were right, I was using an old copy (from freebsddesktop):

100% tests passed, 0 tests failed out of 118

Total Test time (real) =  51.39 sec

The following tests did not run:
         22 - epoll-test.epoll__signalfd_in_thread (Skipped)
         24 - epoll-test.epoll__epollhup_on_fresh_socket (Skipped)
         65 - signalfd-test.signalfd__sigwait_openbsd (Skipped)
         66 - signalfd-test.signalfd__sigchld (Skipped)
         76 - eventfd-ctx-test.eventfd__pollout (Skipped)
         83 - eventfd-ctx-test.eventfd__fork (Skipped)
         86 - eventfd-ctx-test.eventfd__epoll (Skipped)
         88 - pipe-test.pipe__poll_write_end_after_read_end_close (Skipped)
         90 - pipe-test.pipe__poll_full_write_end_after_read_end_close_hup (Skipped)
         93 - pipe-test.pipe__poll_full_minus_512b_write_end_after_read_end_close (Skipped)
         94 - pipe-test.pipe__pipe_event_poll (Skipped)
        100 - pipe-test.pipe__closed_read_end (Skipped)
        102 - pipe-test.pipe__closed_read_end_register_before_close (Skipped)
        103 - pipe-test.pipe__closed_write_end (Skipped)

[tuxillo]

For now we've removed our newport for x11/libinput and switched to the FreeBSD ports version which uses the epoll shim. I'll ask around if anybody is using wayland so that they can test, I'm worried that something could stop working since there are wayland users in DFly.