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From: Alex =?utf-8?Q?Benn=C3=A9e?= <alex.bennee@linaro.org>
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Date: Mon, 12 Dec 2016 11:39:49 +0000
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Subject: Re: [Qemu-devel] aarch64-linux-user compilation error
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To: Pranith Kumar <bobby.prani@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, QEMU Developers <qemu-devel@nongnu.org>


Pranith Kumar <bobby.prani@gmail.com> writes:

> On Sun, Dec 11, 2016 at 5:59 PM, Peter Maydell <peter.maydell@linaro.org> wrote:
>>
>>> Error:
>>> /home/pranith/devops/code/qemu/linux-user/ioctls.h:224:9: error: ‘SNDCTL_DSP_MAPINBUF’ undeclared here (not in a function)
>>>    IOCTL(SNDCTL_DSP_MAPINBUF, IOC_R, MK_PTR(MK_STRUCT(STRUCT_buffmem_desc)))
>>>          ^
>>
>> SNDCTL_DSP_MAPINBUF is supposed to be defined by your system
>> headers (/usr/include/linux/soundcard.h or equivalent).
>> Similarly for SNDCTL_DSP_MAPOUTBUF and SOUND_MIXER_ACCESS.
>>
>> Looking at QEMU's git history we've used these symbols
>> for years. I would check whether your system headers
>> are actually providing these symbols (and that the
>> compiler is really putting the right headers on the
>> include path).
>
> So soundcard.h header is provided by two packages:
>
> $ apt-file search /usr/include/linux/soundcard.h
> linux-libc-dev: /usr/include/linux/soundcard.h
> oss4-dev: /usr/include/linux/soundcard.h
>
> I had oss4-dev installed. After removing that and reinstalling
> linux-libc-dev, it compiles fine. Not sure why this file differs. May
> be a packaging issue.

Sounds like it. How did you ensure you had your QEMU build dependencies
installed on your system?

--
Alex Bennée