Make LTO Patch for Job Server Thread Detection Agnostic

[Nathan Sidwell]

On 2/27/20 12:04 PM, Paul Smith wrote:
> On Thu, 2020-02-27 at 16:58 +0000, Jonathan Wakely wrote:
>>> That's a problem then as were assuming a user's build system for this
>>> to work. I mean for now its fine but in the future wouldn't it de a
>>> good ideal to not assume this?
>>
>> It works fine for everybody. There's just an optimisation for people
>> with a GNU make jobserver available. I don't see a problem.
>>
>> If somebody wants to add an optimisation for their preferred build
>> system they can propose a patch.
> 
> And/or they can suggest to other build systems that they also add support
> for this service.
> 
> I'm not aware of any service like this which is supported by all build
> tools, so it's not like we're choosing this over something else that's more
> widely available.  Actually as far as I know other build tools don't
> provide anything like it, portable or not.

Recently Honza, me and others discussed LTO's interaction with build 
systems, and that perhaps the module mapper could be generalized for 
other purposes.  (Yes, still need to resurrect my Make PoC)

nathan

-- 
Nathan Sidwell