kc3-lang/libevent/cmake/CheckWorkingKqueue.cmake
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Hash : 89505f85
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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
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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)