RFR: JDK-8200083: Bump bootjdk requirement for JDK 11 to JDK 10

[John Paul Adrian Glaubitz]

On 03/22/2018 07:07 AM, Martin Buchholz wrote:
> But for users, being able to bootstrap with an ancient jdk is definitely
> convenient.

Convenient is an understatement. Always enforcing the N-1 version to be
used can be quite painful for downstream distributions. Rust upstream
does the same thing and it becomes very frustrating when bootstrapping
the compiler.

When, for example, an architecture has fallen back a couple of releases
of OpenJDK, I would have to go through the whole chain of 8->9->10->11
to get the latest OpenJDK. I know that cross-compiling is possible, but
it's not always the easiest option.

So, from a downstream perspective, allowing the oldest possible version
is always a desirable feature to have. I do understand it though when
OpenJDK 11 requires features from OpenJDK 10 which would rule out older
versions completely.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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