Re: [Xen-users] trouble with building latest xen code

[Aastha Mehta <aasthakm@xxxxxxxxx>]

On 20 February 2014 13:28, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Thu, 2014-02-20 at 13:15 +0100, Aastha Mehta wrote:
>> On 20 February 2014 11:43, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>> > On Thu, 2014-02-20 at 11:40 +0100, Aastha Mehta wrote:
>> >> I just figured out the problem. While building the Xen code, I blindly
>> >> used all the dependencies listed on
>> >> http://wiki.xen.org/wiki/Compiling_Xen_From_Source and used apt-get to
>> >> install libyajl-dev. Looks like apt-cache has older version of the
>> >> library available. Even though I later installed the latest yajl from
>> >> the github, the default library being used was the older version. I
>> >> uninstalled the older version and then re-installed the latest and
>> >> everything works now.
>> >
>> > Which older version were you using and on which distro?
>> >
>> > If Xen doesn't build with the packages present in some major distro I
>> > think we want to know about it.
>> >
>> > Ian.
>> >
>> >
>>
>> Distro - Ubuntu 12.04.3 LTS (Precise),
>> Kernel - 3.13.2
>> Xen version - 4.4 unstable (custom build)
>> yajl older version: 1.0.12-2
>> # aptitude versions libyajl-dev
>> Package libyajl-dev:
>> pi  1.0.12-2                    precise                         500
>> Package libyajl-dev:i386:
>> p   1.0.12-2                    precise                         500
>>
>> Latest yajl version available: 2.0.1
>>
>> There is some change in the yajl code between version 1 and 2, which
>> prevents the tools, specifically libxl from compiling.
>
> Thanks.
>
> libxl is supposed to handle yajl1 as well as yajl2, detected at compile
> time. The only references to yajl_gen_config I can see are correctly
> within #ifdef HAVE_YAJL_V2 blocks and shouldn't be used when compiling
> against yajl1.
>
> Does Ubuntu's yajl 1.0.12 include /usr/include/yajl/yajl_version.h? This
> is used to detect which version, via the YAJL_MAJOR #define in it.
> http://packages.ubuntu.com/precise/amd64/libyajl-dev/filelist says it
> was there and it contained:
>         #define YAJL_MAJOR 1
>         #define YAJL_MINOR 0
>         #define YAJL_MICRO 12
>
> so I think libxl should have been using the yajl1 compatible code in
> libxl_json.h
>
> Did you by any chance have a mixture of packaged and unpackaged versions
> of libyajl installed when you saw this failure?
>
> Ian.
>

That might have been the case actually. I do remember downloading and
installing all sorts of dependencies before building xen. The
yajl_version.h file was there, but because of a mixture of versions
installed things must have got messed up.

Thanks,
Aastha.

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users