Add build system

[zfs.git] / config / kernel-kobj-name-len.m4

diff --git a/config/kernel-kobj-name-len.m4 b/config/kernel-kobj-name-len.m4
new file mode 100644 (file)
index 0000000..5363a41
--- /dev/null
+++ b/config/kernel-kobj-name-len.m4
@@ -0,0 +1,21 @@
+dnl #
+dnl # 2.6.27 API change,
+dnl # kobject KOBJ_NAME_LEN static limit removed.  All users of this
+dnl # constant were removed prior to 2.6.27, but to be on the safe
+dnl # side this check ensures the constant is undefined.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_KOBJ_NAME_LEN], [
+       AC_MSG_CHECKING([whether kernel defines KOBJ_NAME_LEN])
+       ZFS_LINUX_TRY_COMPILE([
+               #include <linux/kobject.h>
+       ],[
+               int val;
+               val = KOBJ_NAME_LEN;
+       ],[
+               AC_MSG_RESULT([yes])
+               AC_DEFINE(HAVE_KOBJ_NAME_LEN, 1,
+                         [kernel defines KOBJ_NAME_LEN])
+       ],[
+               AC_MSG_RESULT([no])
+       ])
+])