[OE-core] [PATCH] libxml2: explicitly disable zlib for native builds

[Otavio Salvador]

Hello Richard,

On Thu, Aug 21, 2014 at 4:50 AM, Richard Purdie
<richard.purdie at linuxfoundation.org> wrote:
> On Thu, 2014-08-14 at 17:20 -0300, Mario Domenech Goulart wrote:
>> Without this change, meta-openembedded's php recipe (as of 45e62fb8 --
>> "php 5.4.14: use pkg-config for libxml2 detection") breaks with this
>> error on my system:
>>
>>    tmp/sysroots/x86_64-linux/usr/lib/libxml2.so: undefined reference
>>    to `gzopen64 at ZLIB_1.2.3.3'
>>
>> It seems that the host's zlib is leaking into libxml2's build.
>
> It turns out we need a zlib dependency here, else createrepo fails to
> deal with the compressed index files in the rpm repos. With rpm enabled,
> you can reproduce with:
>
> "bitbake package-index"
>
> Unfortunately this error causes a cascade of other problems and caused
> several people hours of work trying to figure out why the autobuilder
> was "exploding".
>
> Basically, the error above triggers a binary character to be emitted
> into the logs. The error reporting tool chokes on this since JSON can't
> handle the character causing an exception deep in the event handling
> code.
>
> That exception is badly handled and causes bitbake to enter an infinite
> loop, spewing traceback data to the console. That in turn creates
> gigabytes of log files and the autobuilder falls over.
>
> So if anyone wonders why we haven't had patches merging, this is why.
> We're now quite behind with the queue.
>
> Obviously there are fixes to make in multiple parts of the system to
> stop this kind of error escalating so badly again.

This was unfortunate indeed :-(

Mario and I tested this is two customers but both use IPK. We didn't
consider testing with RPM.

To fix the issue, can we send a depends for native/nativesdk?

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
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