RFR: JDK-8200083: Bump bootjdk requirement for JDK 11 to JDK 10
thomas.stuefe at gmail.com
Thu Mar 22 07:09:31 UTC 2018
On Thu, Mar 22, 2018 at 7:37 AM, Ao Qi <aoqi at loongson.cn> wrote:
> 2018-03-22 6:41 GMT+08:00 John Paul Adrian Glaubitz
> <glaubitz at physik.fu-berlin.de>:
> > 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.
> Indeed. I was trying to build OpenJDK 11 zero on MIPS. Because I only had
> OpenJDK 8 binary as boot JDK, I have to build OpenJDK 9 first.
> It is even more painful when I build OpenJDK 11 32 bits zero. Because I
> have 32-bit OpenJDK 6 as boot JDK, I have to build 7, 8, 9 and then 11.
And the build is not blindingly fast with a zero VM as boot jdk :)
> > 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
> > `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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