3 files changed, 40 insertions, 0 deletions
diff --git a/src/sysdeps/trykevent.c b/src/sysdeps/trykevent.c
new file mode 100644
index 0000000..8c54f4d
--- /dev/null
+++ b/src/sysdeps/trykevent.c
@@ -0,0 +1,19 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#include <sys/types.h>
+#include <sys/event.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+int main (void)
+{
+  int q = kqueue() ;
+  struct kevent ke ;
+  struct timespec ts = { .tv_sec = 1, .tv_nsec = 0 } ;
+  EV_SET(&ke, getpid(), EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, 0) ;
+  kevent(q, &ke, 1, &ke, 1, &ts) ;
+  return 0 ;
+}
diff --git a/src/sysdeps/trypidfd_open.c b/src/sysdeps/trypidfd_open.c
new file mode 100644
index 0000000..8840742
--- /dev/null
+++ b/src/sysdeps/trypidfd_open.c
@@ -0,0 +1,9 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+static long a = SYS_pidfd_open ;
diff --git a/src/sysdeps/tryprsetchildsubreaper.c b/src/sysdeps/tryprsetchildsubreaper.c
new file mode 100644
index 0000000..6a65691
--- /dev/null
+++ b/src/sysdeps/tryprsetchildsubreaper.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#include <sys/prctl.h>
+
+int main (void)
+{
+  prctl(PR_SET_CHILD_SUBREAPER, 1) ;
+  return 0 ;
+}