mirror_zfs/config/kernel-d-obtain-alias.m4

dnl #
dnl # 2.6.28 API change
dnl # Added d_obtain_alias() helper function.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS],
	[AC_MSG_CHECKING([whether d_obtain_alias() is available])
	ZFS_LINUX_TRY_COMPILE_SYMBOL([
		#include <linux/dcache.h>
	], [
		d_obtain_alias(NULL);
	], [d_obtain_alias], [fs/dcache.c], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_D_OBTAIN_ALIAS, 1,
		          [d_obtain_alias() is available])
	], [
		AC_MSG_RESULT(no)
	])
])
Implemented NFS export_operations. Implemented the required NFS operations for exporting ZFS datasets using the in-kernel NFS daemon. 2011-04-28 20:35:50 +04:00			`dnl #`
			`dnl # 2.6.28 API change`
			`dnl # Added d_obtain_alias() helper function.`
			`dnl #`
When checking for symbol exports, try compiling. This patch adds a new autoconf function: ZFS_LINUX_TRY_COMPILE_SYMBOL. This new function does the following: - Call LINUX_TRY_COMPILE with the specified parameters. - If unsuccessful, return false. - If successful and we're configuring with --enable-linux-builtin, return true. - Else, call CHECK_SYMBOL_EXPORT with the specified parameters and return the result. All calls to CHECK_SYMBOL_EXPORT are converted to LINUX_TRY_COMPILE_SYMBOL so that the tests work even when configuring for builtin on a kernel which doesn't have loadable module support, or hasn't been built yet. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #851 2012-07-26 01:38:58 +04:00			`AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS],`
			`[AC_MSG_CHECKING([whether d_obtain_alias() is available])`
			`ZFS_LINUX_TRY_COMPILE_SYMBOL([`
			`#include <linux/dcache.h>`
			`], [`
			`d_obtain_alias(NULL);`
			`], [d_obtain_alias], [fs/dcache.c], [`
			`AC_MSG_RESULT(yes)`
			`AC_DEFINE(HAVE_D_OBTAIN_ALIAS, 1,`
			`[d_obtain_alias() is available])`
			`], [`
			`AC_MSG_RESULT(no)`
			`])`
Implemented NFS export_operations. Implemented the required NFS operations for exporting ZFS datasets using the in-kernel NFS daemon. 2011-04-28 20:35:50 +04:00			`])`