[MacPorts] #63650: Regression in glib2 after update to 2.62 version with qemu tap-bridge networking

[MacPorts]

#63650: Regression in glib2 after update to 2.62 version with qemu tap-bridge
networking
-----------------------+---------------------------------------------------
  Reporter:  andriytk  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  qemu tap bridge networking regression
      Port:  glibc2    |
-----------------------+---------------------------------------------------

Comment (by andriytk):

 Maybe we need to add something like this to meson.build for macOS too:

 {{{
 if host_system == 'windows'
   # Poll doesn't work on devices on Windows
   glib_conf.set('BROKEN_POLL', true)
 endif
 }}}
 https://gitlab.gnome.org/GNOME/glib/-/blob/85969ce3dac5095d6bcdea5fa662220d01474f3c/meson.build#L151-154

 Apparently, in the old version with configure.ac - the broken poll was
 detected automatically:

 {{{
 AC_MSG_CHECKING([for broken poll])
 AC_RUN_IFELSE([AC_LANG_SOURCE([[
         #include <stdlib.h>
         #include <fcntl.h>
         #include <poll.h>
         int main(void) {
           struct pollfd fds[1];
           int fd;
           fd = open("/dev/null", 1);
           fds[0].fd = fd;
           fds[0].events = POLLIN;
           fds[0].revents = 0;
           if (poll(fds, 1, 0) < 0 || (fds[0].revents & POLLNVAL) != 0) {
                 exit(1);  /* Does not work for devices -- fail */
           }
           exit(0);
         }]])],
   [broken_poll=no],
   [broken_poll=yes
    AC_DEFINE(BROKEN_POLL,1,[poll doesn't work on devices])],
   [broken_poll="no (cross compiling)"])
 AC_MSG_RESULT($broken_poll)
 }}}
 https://gitlab.gnome.org/GNOME/glib/-/blob/d80d9af9b7f1fdd25e61ae04fb660e65bf5bb5fc/configure.ac#L2353-2374

 But in the new version, after they switched to meson.build - this does not
 work anymore, I'm afraid.

-- 
Ticket URL: <https://trac.macports.org/ticket/63650#comment:2>
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