--- IO-AIO/configure	2008/05/11 19:11:05	1.3
+++ IO-AIO/configure	2008/10/22 18:15:36	1.6
@@ -2710,10 +2710,9 @@
 int main(void)
 {
    int fd = 0;
-   off64_t offset = 1;
    size_t count = 2;
    ssize_t res;
-   res = readahead (fd, offset, count);
+   res = readahead (fd, 0, count);
    return 0;
 }
 
@@ -2866,19 +2865,37 @@
 _ACEOF
 
 
-{ echo "$as_me:$LINENO: checking for readdir_r" >&5
-echo $ECHO_N "checking for readdir_r... $ECHO_C" >&6; }
-if test "${ac_cv_readdir_r+set}" = set; then
+{ echo "$as_me:$LINENO: checking for sendfile" >&5
+echo $ECHO_N "checking for sendfile... $ECHO_C" >&6; }
+if test "${ac_cv_sendfile+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat >conftest.$ac_ext <<_ACEOF
 
-#include <dirent.h>
+# include <sys/types.h>
+#if __linux
+# include <sys/sendfile.h>
+#elif __freebsd
+# include <sys/socket.h>
+# include <sys/uio.h>
+#elif __hpux
+# include <sys/socket.h>
+#else
+# error unsupported architecture
+#endif
 int main(void)
 {
-   DIR *dir = 0;
-   struct dirent ent, *eres;
-   int res = readdir_r (dir, &ent, &eres);
+   int fd = 0;
+   off_t offset = 1;
+   size_t count = 2;
+   ssize_t res;
+#if __linux
+   res = sendfile (fd, fd, offset, count);
+#elif __freebsd
+   res = sendfile (fd, fd, offset, count, 0, &offset, 0);
+#elif __hpux
+   res = sendfile (fd, fd, offset, count, 0, 0);
+#endif
    return 0;
 }
 
@@ -2901,56 +2918,41 @@
 	 test ! -s conftest.err
        } && test -s conftest$ac_exeext &&
        $as_test_x conftest$ac_exeext; then
-  ac_cv_readdir_r=yes
+  ac_cv_sendfile=yes
 else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_cv_readdir_r=no
+	ac_cv_sendfile=no
 fi
 
 rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
       conftest$ac_exeext conftest.$ac_ext
 fi
-{ echo "$as_me:$LINENO: result: $ac_cv_readdir_r" >&5
-echo "${ECHO_T}$ac_cv_readdir_r" >&6; }
-test $ac_cv_readdir_r = yes &&
+{ echo "$as_me:$LINENO: result: $ac_cv_sendfile" >&5
+echo "${ECHO_T}$ac_cv_sendfile" >&6; }
+test $ac_cv_sendfile = yes &&
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_READDIR_R 1
+#define HAVE_SENDFILE 1
 _ACEOF
 
 
-{ echo "$as_me:$LINENO: checking for sendfile" >&5
-echo $ECHO_N "checking for sendfile... $ECHO_C" >&6; }
-if test "${ac_cv_sendfile+set}" = set; then
+{ echo "$as_me:$LINENO: checking for sync_file_range" >&5
+echo $ECHO_N "checking for sync_file_range... $ECHO_C" >&6; }
+if test "${ac_cv_sync_file_range+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat >conftest.$ac_ext <<_ACEOF
 
-# include <sys/types.h>
-#if __linux
-# include <sys/sendfile.h>
-#elif __freebsd
-# include <sys/socket.h>
-# include <sys/uio.h>
-#elif __hpux
-# include <sys/socket.h>
-#else
-# error unsupported architecture
-#endif
+#include <fcntl.h>
 int main(void)
 {
    int fd = 0;
-   off_t offset = 1;
-   size_t count = 2;
+   off64_t offset = 1;
+   off64_t nbytes = 1;
+   unsigned int flags = SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE|SYNC_FILE_RANGE_WAIT_AFTER;
    ssize_t res;
-#if __linux
-   res = sendfile (fd, fd, offset, count);
-#elif __freebsd
-   res = sendfile (fd, fd, offset, count, 0, &offset, 0);
-#elif __hpux
-   res = sendfile (fd, fd, offset, count, 0, 0);
-#endif
+   res = sync_file_range (fd, offset, nbytes, flags);
    return 0;
 }
 
@@ -2973,22 +2975,22 @@
 	 test ! -s conftest.err
        } && test -s conftest$ac_exeext &&
        $as_test_x conftest$ac_exeext; then
-  ac_cv_sendfile=yes
+  ac_cv_sync_file_range=yes
 else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_cv_sendfile=no
+	ac_cv_sync_file_range=no
 fi
 
 rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
       conftest$ac_exeext conftest.$ac_ext
 fi
-{ echo "$as_me:$LINENO: result: $ac_cv_sendfile" >&5
-echo "${ECHO_T}$ac_cv_sendfile" >&6; }
-test $ac_cv_sendfile = yes &&
+{ echo "$as_me:$LINENO: result: $ac_cv_sync_file_range" >&5
+echo "${ECHO_T}$ac_cv_sync_file_range" >&6; }
+test $ac_cv_sync_file_range = yes &&
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_SENDFILE 1
+#define HAVE_SYNC_FILE_RANGE 1
 _ACEOF