diff -ruN libmemcache-1.4.0.rc2-orig/configure libmemcache-1.4.0.rc2/configure
--- libmemcache-1.4.0.rc2-orig/configure	2006-02-21 02:03:22
+++ libmemcache-1.4.0.rc2/configure	2023-09-17 11:06:59
@@ -5252,6 +5252,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <ctype.h>
+#include <stdlib.h>
 #if ((' ' & 0x0FF) == 0x020)
 # define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
 # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
@@ -8327,10 +8328,10 @@
            allow_undefined_flag='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
          else
            case ${MACOSX_DEPLOYMENT_TARGET} in
-             10.[012])
+             10.[012].*)
                allow_undefined_flag='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
                ;;
-             10.*)
+             *)
                allow_undefined_flag='${wl}-undefined ${wl}dynamic_lookup'
                ;;
            esac
@@ -11306,10 +11307,10 @@
            allow_undefined_flag_CXX='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
          else
            case ${MACOSX_DEPLOYMENT_TARGET} in
-             10.[012])
+             10.[012].*)
                allow_undefined_flag_CXX='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
                ;;
-             10.*)
+             *)
                allow_undefined_flag_CXX='${wl}-undefined ${wl}dynamic_lookup'
                ;;
            esac
@@ -15373,10 +15374,10 @@
            allow_undefined_flag_F77='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
          else
            case ${MACOSX_DEPLOYMENT_TARGET} in
-             10.[012])
+             10.[012].*)
                allow_undefined_flag_F77='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
                ;;
-             10.*)
+             *)
                allow_undefined_flag_F77='${wl}-undefined ${wl}dynamic_lookup'
                ;;
            esac
@@ -17843,10 +17844,10 @@
            allow_undefined_flag_GCJ='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
          else
            case ${MACOSX_DEPLOYMENT_TARGET} in
-             10.[012])
+             10.[012].*)
                allow_undefined_flag_GCJ='${wl}-flat_namespace ${wl}-undefined ${wl}suppress'
                ;;
-             10.*)
+             *)
                allow_undefined_flag_GCJ='${wl}-undefined ${wl}dynamic_lookup'
                ;;
            esac
@@ -27156,6 +27157,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/time.h>
@@ -27232,6 +27234,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/time.h>