Re: [Xen-devel] [PATCH RFC 03/23] include: import FreeBSD headers for evtchn and privcmd devices

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On 17/04/14 18:16, Ian Jackson wrote:
> Roger Pau Monne writes ("[PATCH RFC 03/23] include: import FreeBSD headers 
> for evtchn and privcmd devices"):
>> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
>> Cc: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
>> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> 
> Is it usual, then in the FreeBSD world, for an application program to
> take a copy of kernel headers defining ioctls etc. ?  This seems
> surprising to me.  It would seem more sensible for the application to
> use the headers installed on the build host.

I would say it's certainly not common, but every OS with Dom0 support
seems to do it (take a look at tools/include/xen-sys).

Not sure if this was done in the past to allow compiling the toolstack
on a host without a xen-classic kernel (which I guess was the only one
to have the proper headers for user-space devices).

Roger.


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