Patch #730826: Enable extensions on NetBSD 2.0.
diff --git a/configure.in b/configure.in
index 765e8bf..f495617 100644
--- a/configure.in
+++ b/configure.in
@@ -34,6 +34,11 @@
# on Linux, so we need _GNU_SOURCE to re-enable them (makedev, tm_zone).
AC_DEFINE(_GNU_SOURCE, 1, [Define on Linux to activate all library features])
+# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
+# certain features on NetBSD, so we need _NETBSD_SOURCE to re-enable
+# them.
+AC_DEFINE(_NETBSD_SOURCE, 1, [Define on NetBSD to activate all library features])
+
define_xopen_source=yes
# Arguments passed to configure.