--- libaitio/configure	2016/08/10 13:48:34	1.54.2.2
+++ libaitio/configure	2016/08/10 14:00:27	1.54.2.3
@@ -4270,7 +4270,7 @@ $as_echo "#define HAVE_MMAP 1" >>confdefs.h
 fi
 rm -f conftest.mmap conftest.txt
 
-for ac_func in bzero memset munmap
+for ac_func in bzero memset munmap fpurge
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"