[OE-core] Enabling uninative by default in oe-core?

[Khem Raj]

On 11/17/16 10:56 AM, Nicolas Dechesne wrote:
> On Thu, Nov 17, 2016 at 7:06 PM, Khem Raj <raj.khem at gmail.com> wrote:
>>> Background: uninative is a class that downloads a precompiled host glibc for
>>> use in the sysroot, thus isolating the native sysroot from the host
>>> environment.  This means greater sstate reuse, as instead of native builds
>>> being dependent on the host system they're able to be shared between all
>>> hosts.  There is a reference tarball hosted on www.yoctoproject.org
>>> <http://www.yoctoproject.org>, and the URL can be overridden by distros if you
>>> would prefer to build your own.
>>>
>>> We enable this in Poky so that we get greater reuse on the autobuilders, and
>>> due to some issues with the C++ ABI the eSDK generation in master now requires
>>> uninative to be enabled.  The question is: do we now enable uninative by
>>> default in oe-core's nodistro (pointing at the yoctoproject tarball), or do we
>>> keep it disabled by default and require the user to enable uninative if they
>>> wish to build an eSDK?
>>>
>>> Personally I'm torn: I don't like eSDK not working out of the box, but I don't
>>> really like oe-core nodistro depending on uninative.  Though enabling
>>> uninative globally does mean everything works out of the box, so following the
>>> principle of Least Surprise that's what we should do.
>>
>> If we are supporing e-SDK in OE-Core then we should enable uninative too
>> on the same lines.
>>
>> It does improve the user experience so I am in favor of adding it
>> unconditionally. May be tarball can be hosted on oe mirrors as well for
>> redundancy
> 
> 
> I am not sure how people would care about that (yet ;-) but uninative
> does not work for arm64 (host).
> 
> Build Configuration:
> BB_VERSION        = "1.32.0"
> BUILD_SYS         = "aarch64-linux"
> NATIVELSBSTRING   = "Debian-8.6"
> TARGET_SYS        = "arm-oe-linux-gnueabi"
> MACHINE           = "qemuarm"
> DISTRO            = "nodistro"
> DISTRO_VERSION    = "nodistro.0"
> TUNE_FEATURES     = "arm armv5 thumb dsp"
> TARGET_FPU        = "soft"
> meta              = "master:9303d8055c45a0f6af295d70a6f6a8b9d8d8a7c9"
> 
> ERROR: Uninative selected but not configured correctly, please set
> UNINATIVE_CHECKSUM[aarch64]
> 
> I don't know much about it, but it would be nice to fix that before we
> enable it by default. I will try to have a look at it more closely..
> 

Someone with aarch64 hardware in build boxes could take that up. I dont think
yocto project or many community members have access to hardware. I would be
happy if it informed me and continues without uninative.

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