The usual effects of a new configure.in
diff --git a/config.h.in b/config.h.in
index b7942d4..40d3608 100644
--- a/config.h.in
+++ b/config.h.in
@@ -163,9 +163,15 @@
 /* Define if you have the dup2 function.  */
 #undef HAVE_DUP2
 
+/* Define if you have the execv function.  */
+#undef HAVE_EXECV
+
 /* Define if you have the flock function.  */
 #undef HAVE_FLOCK
 
+/* Define if you have the fork function.  */
+#undef HAVE_FORK
+
 /* Define if you have the ftime function.  */
 #undef HAVE_FTIME
 
@@ -196,6 +202,9 @@
 /* Define if you have the hypot function.  */
 #undef HAVE_HYPOT
 
+/* Define if you have the kill function.  */
+#undef HAVE_KILL
+
 /* Define if you have the link function.  */
 #undef HAVE_LINK