--- IO-AIO/configure.ac	2019/03/18 23:52:09	1.13
+++ IO-AIO/configure.ac	2022/09/05 08:43:58	1.18
@@ -70,6 +70,31 @@
 dnl readv / preadv, vmsplice
 AC_CHECK_HEADERS([sys/uio.h])
 
+AC_CACHE_CHECK([for siginfo_t], ac_cv_siginfo_t, [AC_LINK_IFELSE([AC_LANG_SOURCE([
+#include <signal.h>
+int main (void)
+{
+   siginfo_t si;
+   si.si_code;
+   si.si_pid;
+   si.si_uid;
+   si.si_value.sival_int;
+   si.si_value.sival_ptr;
+   return 0;
+}
+])],ac_cv_siginfo_t=yes,ac_cv_siginfo_t=no)])
+test $ac_cv_siginfo_t = yes && AC_DEFINE(HAVE_SIGINFO_T, 1, have siginfo_t in signal.h)
+
+AC_CACHE_CHECK([for unix-style syscall interface], ac_cv_syscall, [AC_LINK_IFELSE([AC_LANG_SOURCE([
+#include <unistd.h>
+#include <sys/syscall.h>
+int main (void)
+{
+   long res = syscall (SYS_exit, 0);
+   return 0;
+}
+])],ac_cv_syscall=yes,ac_cv_syscall=no)])
+test $ac_cv_syscall = yes && AC_DEFINE(HAVE_SYSCALL, 1, unix syscall interface)
 
 AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([
 #include <sys/types.h>
@@ -109,7 +134,7 @@
 ]])],ac_cv_eventfd=yes,ac_cv_eventfd=no)])
 test $ac_cv_eventfd = yes && AC_DEFINE(HAVE_EVENTFD, 1, eventfd(2) is available)
 
-AC_CACHE_CHECK(for timerfd, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
+AC_CACHE_CHECK(for timerfd_*, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
 #include <sys/timerfd.h>
 int main (void)
 {
@@ -123,6 +148,16 @@
 ]])],ac_cv_timerfd=yes,ac_cv_timerfd=no)])
 test $ac_cv_timerfd = yes && AC_DEFINE(HAVE_TIMERFD, 1, timerfd_*(2) are available)
 
+AC_CACHE_CHECK(for memfd_create, ac_cv_memfd_create, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
+#include <sys/mman.h>
+int main (void)
+{
+   int res = memfd_create ("name", MFD_CLOEXEC | MFD_ALLOW_SEALING);
+   return 0;
+}
+]])],ac_cv_memfd_create=yes,ac_cv_memfd_create=no)])
+test $ac_cv_memfd_create = yes && AC_DEFINE(HAVE_MEMFD_CREATE, 1, memfd_create(2) is available)
+
 AC_CACHE_CHECK(for copy_file_range, ac_cv_copy_file_range, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
 #include <unistd.h>
 #include <sys/syscall.h>
@@ -224,5 +259,40 @@
 ]])],ac_cv_statx=yes,ac_cv_statx=no)])
 test $ac_cv_statx = yes && AC_DEFINE(HAVE_STATX, 1, statx(2) is available)
 
+AC_CACHE_CHECK(for accept4, ac_cv_accept4, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
+#include <sys/types.h>
+#include <sys/socket.h>
+int main (void)
+{
+   int res;
+   res = accept4 (1, (struct sockaddr *)0, (socklen_t)0, SOCK_NONBLOCK | SOCK_CLOEXEC);
+   return 0;
+}
+]])],ac_cv_accept4=yes,ac_cv_accept4=no)])
+test $ac_cv_accept4 = yes && AC_DEFINE(HAVE_ACCEPT4, 1, accept4(2) is available)
+
+AC_CHECK_HEADERS([sys/mount.h])
+AC_CACHE_CHECK(for mount/umount, ac_cv_mount, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
+#include <sys/mount.h>
+int main (void)
+{
+   int res;
+   res = mount ("path", "path", "fstype", MS_RDONLY, 0);
+   res = umount ("path");
+   return 0;
+}
+]])],ac_cv_mount=yes,ac_cv_mount=no)])
+test $ac_cv_mount = yes && AC_DEFINE(HAVE_MOUNT, 1, mount/umount are available)
+AC_CACHE_CHECK(for umount2, ac_cv_umount2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
+#include <sys/mount.h>
+int main (void)
+{
+   int res;
+   res = umount2 ("path", MNT_FORCE|MNT_DETACH);
+   return 0;
+}
+]])],ac_cv_umount2=yes,ac_cv_umount2=no)])
+test $ac_cv_umount2 = yes && AC_DEFINE(HAVE_UMOUNT2, 1, umount2 is available)
+
 AC_OUTPUT