diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_DEVPOLL.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_DEVPOLL.h
new file mode 100644
index 0000000..be384fc
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_DEVPOLL.h
@@ -0,0 +1,14 @@
+// HAVE_DEVPOLL : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_DEVPOLL
+
+/* Since Solaris version ... (?). No version details in manual.
+ */
+#if (defined(__sun) && defined(__SVR4)) || \
+    defined(__sun__)
+#  define HAVE_DEVPOLL 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL.h
new file mode 100644
index 0000000..17e151b
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL.h
@@ -0,0 +1,13 @@
+// HAVE_EPOLL : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_EPOLL
+
+/* Since glibc 2.3.2.
+ */
+#if BUILD2_AUTOCONF_GLIBC_PREREQ(2, 3)
+#  define HAVE_EPOLL 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL_CREATE.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL_CREATE.h
new file mode 100644
index 0000000..0b7fab2
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL_CREATE.h
@@ -0,0 +1,13 @@
+// HAVE_EPOLL_CREATE : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_EPOLL_CREATE
+
+/* Since glibc 2.3.2.
+ */
+#if BUILD2_AUTOCONF_GLIBC_PREREQ(2, 3)
+#  define HAVE_EPOLL_CREATE 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL_CREATE1.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL_CREATE1.h
new file mode 100644
index 0000000..41a7aa3
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_EPOLL_CREATE1.h
@@ -0,0 +1,13 @@
+// HAVE_EPOLL_CREATE1 : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_EPOLL_CREATE1
+
+/* Since glibc 2.9.
+ */
+#if BUILD2_AUTOCONF_GLIBC_PREREQ(2, 9)
+#  define HAVE_EPOLL_CREATE1 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_KQUEUE.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_KQUEUE.h
new file mode 100644
index 0000000..c770527
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_KQUEUE.h
@@ -0,0 +1,16 @@
+// HAVE_KQUEUE : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_KQUEUE
+
+/* Since OpenBSD 2.9, FreeBSD 4.1, NetBSD 2.0, MacOS 10.0.
+ */
+#if BUILD2_AUTOCONF_OPENBSD_PREREQ(200106) || \
+    BUILD2_AUTOCONF_FREEBSD_PREREQ(4, 1)   || \
+    BUILD2_AUTOCONF_NETBSD_PREREQ(2, 0)    || \
+    BUILD2_AUTOCONF_MACOS_PREREQ(10, 0)
+#  define HAVE_KQUEUE 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_WORKING_KQUEUE.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_WORKING_KQUEUE.h
new file mode 100644
index 0000000..a397b42
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_WORKING_KQUEUE.h
@@ -0,0 +1,15 @@
+// HAVE_WORKING_KQUEUE : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_WORKING_KQUEUE
+
+/* Since ...
+ * NOTE: No reliable sources found.
+         See (some) info here: https://bugs.mysql.com/bug.php?id=105562
+ */
+// #if ...
+// #  define HAVE_WORKING_KQUEUE 1
+// #endif