[llvm-dev] Policy on support tiers

[Neil Nelson via llvm-dev]

Renato,

By your earlier requirements for tier 1, not seeing how tier 2 could 
break tier 1. If a file was in tier 2, it would not be in tier 1. There 
would be no action in tier 1 on tier 2 files to cause a break.

What this may mean is that those working in tier 2 do not wander into 
tier 1, obscuring that distinction. Or that there may be some confusion 
about what was in tier 1 vs. 2. That in some manner the distinction 
becomes not well defined.

Neil Nelson

On 10/30/20 6:13 PM, Renato Golin via llvm-dev wrote:
> But I wanted to express: "3 can't break 2 can't break 1", and make it 
> easier to drop silly scripts or config files if they're no longer 
> valid or maintained, more easily than dropping entire build systems.
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