--- libaitsched/configure.in	2012/05/14 12:09:12	1.6
+++ libaitsched/configure.in	2013/05/22 11:31:06	1.19.2.2
@@ -1,11 +1,14 @@
 #
 # $Author: misho $
-# $Id: configure.in,v 1.6 2012/05/14 12:09:12 misho Exp $
+# $Id: configure.in,v 1.19.2.2 2013/05/22 11:31:06 misho Exp $
 #
-AC_INIT(libaitsched, 1.5, misho@openbsd-bg.org)
+AC_INIT(libaitsched, 3.5, misho@openbsd-bg.org)
 AC_CONFIG_SRCDIR([src/aitsched.c])
 AC_CONFIG_HEADERS([inc/config.h])
 
+ac_cv_func_malloc_0_nonnull="yes"
+ac_cv_func_realloc_0_nonnull="yes"
+
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_INSTALL
@@ -23,6 +26,7 @@ LDFLAGS="-L/usr/local/lib ${LDFLAGS}"
 
 # Checks for libraries.
 AC_CHECK_LIB([pthread], [pthread_create])
+AC_CHECK_LIB([rt], [aio_read])
 
 # Checks for header files.
 AC_CHECK_HEADERS([stdint.h stdlib.h string.h sys/time.h unistd.h])
@@ -51,8 +55,22 @@ AC_ARG_ENABLE(debug,
 		esac ], AC_DEFINE(NDEBUG,, [Turn off debug asserts]))
 AC_MSG_RESULT($DEBUG)
 
+AIO=no
+AC_MSG_CHECKING(AIO Builtin support)
+AC_ARG_ENABLE(aio,
+	[  --enable-aio            Build scheduler library with AIO operations ], 
+	[ AIO=$enableval
+		case "$enableval" in
+			yes)
+				AC_DEFINE(AIO_SUPPORT,, [Build scheduler library with AIO operations])
+				;;
+			*)
+				;;
+		esac ],)
+AC_MSG_RESULT($AIO)
+
 AC_CONFIG_FILES([Makefile
                  inc/Makefile
                  lib/Makefile
                  src/Makefile])
-AC_OUTPUT
+AC_OUTPUT()