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From: David Herrmann <dh.herrmann@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Jim Davis <jim.epost@gmail.com>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	linux-next <linux-next@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Daniel Mack <daniel@zonque.org>,
	David Herrmann <dh.herrmann@googlemail.com>,
	Djalal Harouni <tixxdz@opendz.org>
Subject: Re: randconfig build error with next-20150316, in samples/kdbus/kdbus-workers
Date: Mon, 16 Mar 2015 23:27:54 +0100	[thread overview]
Message-ID: <CANq1E4S82hHRNgfnUCVYbzHku6X3kZchUNY4VRW0+YM9q_8Mbg@mail.gmail.com> (raw)
In-Reply-To: <1426540369.20069.1.camel@ellerman.id.au>

Hi

On Mon, Mar 16, 2015 at 10:12 PM, Michael Ellerman <mpe@ellerman.id.au> wrote:
> On Mon, 2015-03-16 at 17:31 +0100, David Herrmann wrote:
>> Hi
>>
>> On Mon, Mar 16, 2015 at 5:22 PM, Jim Davis <jim.epost@gmail.com> wrote:
>> > Building with the attached random configuration file,
>> >
>> > In file included from ./include/uapi/linux/kdbus.h:12:0,
>> >                  from samples/kdbus/kdbus-api.h:5,
>> >                  from samples/kdbus/kdbus-workers.c:79:
>> > ./include/uapi/linux/types.h:9:2: warning: #warning "Attempt to use
>> > kernel headers from user space, see
>> > http://kernelnewbies.org/KernelHeaders" [-Wcpp]
>> >  #warning "Attempt to use kernel headers from user space, see
>> > http://kernelnewbies.org/KernelHeaders"
>> >   ^
>> > In file included from ./include/uapi/linux/posix_types.h:4:0,
>> >                  from ./include/uapi/linux/types.h:13,
>> >                  from ./include/uapi/linux/kdbus.h:12,
>> >                  from samples/kdbus/kdbus-api.h:5,
>> >                  from samples/kdbus/kdbus-workers.c:79:
>> > ./include/uapi/linux/stddef.h:1:28: fatal error: linux/compiler.h: No
>> > such file or directory
>> >  #include <linux/compiler.h>
>> >                             ^
>> > compilation terminated.
>> > scripts/Makefile.host:91: recipe for target 'samples/kdbus/kdbus-workers' failed
>> > make[2]: *** [samples/kdbus/kdbus-workers] Error 1
>>
>> If you build the samples in ./samples/, you need up-to-date kernel
>> headers. The kdbus samples rely on linux/kdbus.h to be available.
>>
>> A simple "make headers_install" will copy the headers to the local
>> directory ./usr/ in your kernel tree. This is the preferred location
>> over /usr/include by all tools in the kernel tree. That is, run "make
>> headers_install" once and your local tree will build fine. Once your
>> kernel-headers in /usr/include are up-to-date, it will work just
>> out-of-the-box again.
>>
>> In other words, if CONFIG_SAMPLES is enabled, you need the sanitized
>> kernel headers in your include path.
>
> But the samples are also including the unsanitised headers, which I think is
> what's causing the problem here.

The uapi-include only causes the warning, not the build failure.
There's already a fix for that queued:

http://git.kernel.org/cgit/linux/kernel/git/gregkh/char-misc.git/commit/?h=kdbus&id=526edb23cd096375683455c73b56baba34ae3f06

Thanks
David

  reply	other threads:[~2015-03-16 22:27 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-16 16:22 randconfig build error with next-20150316, in samples/kdbus/kdbus-workers Jim Davis
2015-03-16 16:31 ` David Herrmann
2015-03-16 21:12   ` Michael Ellerman
2015-03-16 22:27     ` David Herrmann [this message]
2015-03-16 22:51       ` Michael Ellerman
2015-03-16 23:00         ` David Herrmann
2015-03-17  2:09           ` Michael Ellerman
2015-03-16 22:28     ` Stephen Rothwell

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