Add clean failure for EVFILT_PROC usage

configure.ac

@@ -139,10 +139,33 @@ AC_SEARCH_LIBS(pthread_create, pthread)
 #
 # Prefer native kqueue(2); otherwise use libkqueue if present.
 #
-AC_CHECK_HEADER(sys/event.h, [],
+AC_CHECK_HEADER(kqueue/sys/event.h,
+  [kqueue_include="#include <kqueue/sys/event.h>"
+   kqueue_lib="-lkqueue"]
+)
+
+AC_CHECK_HEADER(sys/event.h,
+  [kqueue_include="#include <sys/event.h>"],
   [PKG_CHECK_MODULES(KQUEUE, libkqueue)]
 )
 
+AC_SUBST([LIBS],["${LIBS} $kqueue_lib"])
+AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM([
+                $kqueue_include
+                #include <stdlib.h>], [
+                int kq, i;
+                struct kevent ke;
+                kq = kqueue();
+                if (kq == -1) return(1);
+                EV_SET(&ke, 1, EVFILT_PROC, EV_ADD, NOTE_EXIT | NOTE_FORK | NOTE_EXEC, 0, NULL);
+                i = kevent(kq, &ke, 1, NULL, 0, NULL);
+                if (i == -1) return(1);
+                return(0);])],
+        [AC_DEFINE(HAVE_EVFILT_PROC, 1, [Define if EVFILT_PROC available])],
+        [AC_DEFINE(HAVE_EVFILT_PROC, 0, [Define if EVFILT_PROC available])]
+)
+
 AC_CHECK_FUNCS([strlcpy getprogname], [],
   [PKG_CHECK_MODULES(BSD_OVERLAY, libbsd-overlay,[
     AC_DEFINE(HAVE_STRLCPY, 1, [])

src/source.c

@@ -106,6 +106,13 @@ dispatch_source_create(dispatch_source_type_t type,
 	}
 
 	switch (type->ke.filter) {
+#if !HAVE_EVFILT_PROC
+	// return null if not supported
+	case EVFILT_PROC:
+		return NULL;
+		break;
+#endif
+
 	case EVFILT_SIGNAL:
 		if (handle >= NSIG) {
 			return NULL;

tests/Makefile.am

@@ -21,12 +21,12 @@ noinst_SCRIPTS=leaks-wrapper.sh
 
 UNPORTED_TESTS=					\
 	dispatch_deadname			\
-	dispatch_proc				\
 	dispatch_vm				\
 	dispatch_vnode				\
 	dispatch_select
 
 PORTED_TESTS_FAILED=				\
+	dispatch_proc				\
 	dispatch_group				\
 	dispatch_priority			\
 	dispatch_priority2			\

tests/dispatch_proc.c

@@ -50,8 +50,12 @@ test_proc(pid_t bad_pid)
 	posix_spawnattr_t attr;
 	res = posix_spawnattr_init(&attr);
 	assert(res == 0);
-	res = posix_spawnattr_setflags(&attr, POSIX_SPAWN_START_SUSPENDED);
-	assert(res == 0);
+
+#if HAVE_POSIX_SPAWN_START_SUSPENDED
+    short spawnflags = POSIX_SPAWN_START_SUSPENDED;
+    res = posix_spawnattr_setflags(&attr, spawnflags);
+    assert(res == 0);
+#endif
 
 	char* args[] = {
 		"/bin/sleep", "2", NULL