RFR: 8016780: (xs) README-builds.html misses crucial requirement on bootstrap JDK

[Jonathan Gibbons]

On 06/17/2013 05:21 PM, Stuart Marks wrote:
> On 6/17/13 4:02 PM, Kelly O'Hair wrote:
>> Rule #1 Nobody reads the README
>> Rule #2 When things go wrong, blame the README
>>
>> I of course have no objection to the change, however, I'm not 
>> convinced it will
>> help much the next time someone runs into this. :^(
>
> Hi Kelly! You still read this stuff here? :-)
>
> Yeah, I have no illusions that changing the README will prevent many, 
> if any, future occurrences of this problem. However, we had an 
> internal discussion on this incident where the N-1 rule was asserted. 
> There was no dispute about the rule, but I went off to find where it 
> was documented, and found only the fairly weak statement in the 
> README. So, at the very least, that ought to be fixed.
>
> A stronger step would be to modify configure to check the version of 
> the boot JDK and to complain if it doesn't match N-1. Or perhaps even 
> N-1 and update >= 7. What do you think? I was considering filing an RFE.
>
> A restriction in configure would probably be more effective at 
> preventing these kinds of errors.
>
> s'marks

Stuart,

At least make sure you don't break "make bootcycle-images" which 
deliberately uses the newly built JDK to build itself again.

-- Jon