Re: System headers with clang?

On 10/11/2011 1:36 PM, Arnaud Lacombe wrote:
> Hi,
>
> On Tue, Oct 11, 2011 at 8:00 AM, Dimitry Andric<dim_at_freebsd.org>  wrote:
>> On 2011-10-09 19:32, Larry Rosenman wrote:
>>> I had gotten a PR about sysutils/lsof not compiling with clang.  I had
>>> Vic Abell check it out, and the problem is NOT with lsof per se, but
>>> with the system headers.
>>>
>>> Is there a project afoot to update the system headers to make them clang
>>> compilable?
>> The problem isn't that clang can't compile the system headers, but
>> normally these don't get included from userspace.  And they certainly
>> won't work as expected when you define _KERNEL in userspace, as the lsof
>> port foolishly does.  It probably can't be avoided in such a tool, though.
>>
> #ifdef _KERNEL/#endif protected part of system headers shall NEVER be
> accessed by userland. It is a fault to have them present in
> /usr/include. Linux got it right there, all those part are removed
> upon headers' installation.
>
>   - Arnaud
Then lsof would NOT be compilable / usable at all, as it delves into 
/dev/kmem to get information.

And it **NEEDS** to know what the structures are.

That is unless someone(tm) writes the Kernel interfaces to get the info.


-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 512-248-2683                 E-Mail: ler_at_lerctr.org
US Mail: 430 Valona Loop, Round Rock, TX 78681-3893