b=20655

[fs/lustre-release.git] / build / autoconf / lustre-build.m4

diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index 610519f..b85f5d5 100644 (file)
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -246,6 +246,46 @@ fi
 AC_CONFIG_SUBDIRS(ldiskfs)
 ])
 
 AC_CONFIG_SUBDIRS(ldiskfs)
 ])
 

+AC_DEFUN([LC_KERNEL_WITH_EXT4],
+[if test -f $LINUX/fs/ext4/ext4.h ; then
+$1
+else
+$2
+fi
+])
+
+#
+# LB_HAVE_EXT4_ENABLED
+#
+AC_DEFUN([LB_HAVE_EXT4_ENABLED],
+[
+if test x$RHEL_KERNEL = xyes; then
+       AC_ARG_ENABLE([ext4],
+                AC_HELP_STRING([--enable-ext4],
+                               [enable building of ldiskfs based on ext4]),
+               [],
+               [
+                       if test x$ldiskfs_is_ext4 = xyes; then
+                               enable_ext4=yes
+                       else
+                               enable_ext4=no
+                       fi
+               ])
+else
+       case $LINUXRELEASE in
+       # ext4 was in 2.6.22-2.6.26 but not stable enough to use
+       2.6.2[0-6]*) enable_ext4='no' ;;
+       *)  LC_KERNEL_WITH_EXT4([enable_ext4='yes'],
+                               [enable_ext4='no']) ;;
+       esac
+fi
+if test x$enable_ext4 = xyes; then
+        ac_configure_args="$ac_configure_args --enable-ext4"
+fi
+AC_MSG_CHECKING([whether to build ldiskfs based on ext4])
+AC_MSG_RESULT([$enable_ext4])
+])
+

 # Define no libcfs by default.
 AC_DEFUN([LB_LIBCFS_DIR],
 [
 # Define no libcfs by default.
 AC_DEFUN([LB_LIBCFS_DIR],
 [


@@ -873,8 +913,8 @@ LN_CONFIG_CDEBUG
 LC_QUOTA
 
 LB_CONFIG_MODULES
 LC_QUOTA
 
 LB_CONFIG_MODULES

-

 LN_CONFIG_USERSPACE
 LN_CONFIG_USERSPACE

+LB_HAVE_EXT4_ENABLED

 
 LB_PATH_DMU
 LB_PATH_LIBSYSIO
 
 LB_PATH_DMU
 LB_PATH_LIBSYSIO