--- IO-AIO/configure.ac	2012/04/06 11:39:25	1.4
+++ IO-AIO/configure.ac	2012/04/10 05:01:34	1.5
@@ -1,11 +1,11 @@
-AC_PREREQ(2.59)
 AC_INIT
 AC_CONFIG_SRCDIR([libeio/eio.h])
 AC_CONFIG_HEADERS([libeio/config.h])
 
-AC_PROG_CC
+AC_PREREQ(2.60)
+AC_USE_SYSTEM_EXTENSIONS
 
-AC_CHECK_HEADERS([linux/fs.h linux/fiemap.h])
+AC_PROG_CC
 
 m4_include([libeio/libeio.m4])