[oe] [Openembedded-architecture] [meta-browser] Chromium and gold linker

[Khem Raj]

On 7/10/17 3:07 PM, Denys Dmytriyenko wrote:
> On Mon, Jul 10, 2017 at 10:35:26PM +0100, Phil Blundell wrote:
>> On Mon, 2017-07-10 at 17:09 -0400, Denys Dmytriyenko wrote:
>>> On Mon, Jul 10, 2017 at 02:00:35PM -0700, Khem Raj wrote:
>>>> On 7/10/17 1:47 PM, Denys Dmytriyenko wrote:
>>>>> On Mon, Jul 10, 2017 at 04:36:42PM -0400, Denys Dmytriyenko
>>>>> wrote:
>>>>>> Khem, et al,
>>>>>>
>>>>>> I couldn't find below patch being discussed on this mailing
>>>>>> list before it got 
>>>>>> merged:
>>>>>>
>>>>>> https://github.com/OSSystems/meta-browser/commit/62e323848f569c
>>>>>> 4cdea5567b1917ce006d7705af
>>>>>
>>>>> https://github.com/OSSystems/meta-browser/commit/55a74501bc65c90c
>>>>> 86e3236b51ec2dc2fc0145fb
>>>>>
>>>>> "ld-is-gold just means that my default linker is gold, however we
>>>>> build
>>>>> both linkers, so one should be able to enable gold just for
>>>>> linking
>>>>> chromium even if default ld is bfd linker."
>>>>>
>>>>> I strongly disagree with such interpretation - this would mean
>>>>> there's NO way 
>>>>> to disable gold linker completely, e.g. for when external
>>>>> toolchain doesn't 
>>>>> support it.
>>>
>>> Copying OE architecture list for further discussion of "ld-is-gold"
>>> meaning.
>>
>> The attribution above is a bit confusing so I'm not quite sure who
>> wrote what.  But it is certainly true that "ld-is-gold" in
>> DISTRO_FEATURES means, and always has meant, simply that gold is to be
>> installed as the default linker.  In other words, if you invoke plain
>> "ld", you will get gold, and if you need the BFD linker - usually
>> because you are using linker scripts that gold doesn't understand -
>> then you must invoke ld.bfd.  See
>> 207a9013670560d62c793a66f01e19f4760a71a8 from some six years ago for
>> the place that it was originally added.
>>
>> As far as I know, we do not have (and never have had) any
>> DISTRO_FEATURE that will inhibit gold from being installed altogether,
> 
> It is not about being installed, but about being supported by the toolchain 
> in use - think of external toolchains not built by OE-Core... The original 
> question was whether it's appropriate to force gold linker in recipes, if 
> ld-is-gold is not set by the distro.

We do not have a set API for external toolchains, and thats also wy
external toolchains have to contantly adjust with newer OE release.
however, in this case external toolchains could provide ld.gold that
symlinks to bfd linker

> 
> 
>> nor can I immediately think of a reason why this would be generally
>> useful.  Obviously, any DISTRO that wants to do this is welcome to
>> provide a bbappend for binutils.
>>
>> p.
>>

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