kc3-lang/libevent/cmake/CheckWorkingKqueue.cmake

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• Hash : 89505f85
  Author :
  Date : 2021-11-11T20:12:14
  

  CheckWorkingKqueue.cmake: fix missing headers
  
  Avoid implicitly declaring functions memset() and exit()
  as it is considered an error by some compilers
  (e.g. Xcode clang 12 and later)
  

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• cmake/CheckWorkingKqueue.cmake

• include(CheckCSourceRuns)
  
  check_c_source_runs(
  "
  #include <stdlib.h>
  #include <string.h>
  #include <sys/types.h>
  #include <sys/time.h>
  #include <sys/event.h>
  #include <stdio.h>
  #include <unistd.h>
  #include <fcntl.h>
  
  int
  main(int argc, char **argv)
  {
      int kq;
      int n;
      int fd[2];
      struct kevent ev;
      struct timespec ts;
      char buf[80000];
  
      if (pipe(fd) == -1)
          exit(1);
      if (fcntl(fd[1], F_SETFL, O_NONBLOCK) == -1)
          exit(1);
  
      while ((n = write(fd[1], buf, sizeof(buf))) == sizeof(buf))
          ;
  
      if ((kq = kqueue()) == -1)
          exit(1);
  
      memset(&ev, 0, sizeof(ev));
      ev.ident = fd[1];
      ev.filter = EVFILT_WRITE;
      ev.flags = EV_ADD | EV_ENABLE;
      n = kevent(kq, &ev, 1, NULL, 0, NULL);
      if (n == -1)
          exit(1);
  
      read(fd[0], buf, sizeof(buf));
  
      ts.tv_sec = 0;
      ts.tv_nsec = 0;
      n = kevent(kq, NULL, 0, &ev, 1, &ts);
      if (n == -1 || n == 0)
          exit(1);
  
      exit(0);
  }
  
  " EVENT__HAVE_WORKING_KQUEUE)
  

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