[Buildroot] [PATCH 1/2] system: add default to BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES

[Yann E. MORIN <yann.morin.1998@free.fr>]

Petr, All,

On 2019-07-22 07:16 +0200, Petr Vorel spake thusly:
> Enable BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES if none
> of non-supported rootfs is selected.

No, sorry.

As I explained in another thread, there are valid cases where one does
not need capabilities (and thus xattrs) on their systems.

In that case, your change would mean that the defconfig files of those
people now default to using xattrs, when they previously would not.

> Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
> ---
> Hi,
> 
> not sure about cloop, cpio, tar, ubi.
> 
> Kind regards,
> Petr
> 
>  system/Config.in | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/system/Config.in b/system/Config.in
> index af7d8566d3..842e745cd3 100644
> --- a/system/Config.in
> +++ b/system/Config.in
> @@ -196,6 +196,7 @@ config BR2_ROOTFS_STATIC_DEVICE_TABLE
>  
>  config BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES
>  	bool "support extended attributes in device tables"
> +	default y if !BR2_TARGET_ROOTFS_AXFS && !BR2_TARGET_ROOTFS_CRAMFS && !BR2_TARGET_ROOTFS_ISO9660 && !BR2_TARGET_ROOTFS_ROMFS && !BR2_TARGET_ROOTFS_YAFFS2

In any case, iff we were to add this, this should be done differently,
because we do not want to hard-code the list of filesystems here. For
one, becaise the list is long; and for two, because of filesystems from
the br2-external trees.

Instead, we would have to do:

    config BR2_ROOTFS_SUPPORTS_XATTRS
        bool

    config BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES
        bool "support extended attributes in device tables"
        default y if BR2_ROOTFS_SUPPORTS_XATTRS

and then filesystems would be responsible for setting:

    config BR2_TARGET_ROOTFS_EXT2
        bool "ext2/3/4 root filesystem"
        select BR2_ROOTFS_SUPPORTS_XATTRS

But again, I think it does not gain much. People who want xattrs will
know enough to enable it.

Regards,
Yann E. MORIN.

>  	help
>  	  Support extended attributes handling in device tables
>  
> -- 
> 2.20.1
> 
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