freebsd-nq/config/kernel-blk-rq-pos.m4
Brian Behlendorf c9c0d073da Add build system
Add autoconf style build infrastructure to the ZFS tree.  This
includes autogen.sh, configure.ac, m4 macros, some scripts/*,
and makefiles for all the core ZFS components.
2010-08-31 13:41:27 -07:00

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dnl #
dnl # 2.6.31 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BLK_RQ_POS], [
AC_MSG_CHECKING([whether blk_rq_pos() is available])
ZFS_LINUX_TRY_COMPILE([
#include <linux/blkdev.h>
],[
struct request *req = NULL;
(void) blk_rq_pos(req);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_RQ_POS, 1,
[blk_rq_pos() is available])
],[
AC_MSG_RESULT(no)
])
])