help: configuration issues

Razvan Minciuna razvan.minciuna at
Wed Sep 13 14:19:39 UTC 2017

Hi Maurizio,

Everything worked perfect. Thank you.

After the installation I was able to run this simple Hello World code:

import java.util.ArrayList;
import java.util.List;

public class App{
   public static void main(String[] args){
      var list = new ArrayList<>():

and got this output : [Razvan, Minciuna]

So, I guess I´m ready for the next step.

Thanks again.


On Wed, Sep 13, 2017 at 11:49 AM, Maurizio Cimadamore <
maurizio.cimadamore at> wrote:

> On 13/09/17 06:09, Razvan Minciuna wrote:
>> Hi,
>> I am trying to properly configure the development environment so I can
>> test
>> the amber project.
>> This is my first experience with openjdk and I couldn´t find enough
>> information to get it done.
>> So, after downloading the lvti branch from the repository and put it into
>> the Eclipse I don´t know where to go next.
>> If you have any documentation so I can read in order to finish the process
>> so I can start using and testing the repository please let me know.
>> Thank you.
> Hi Razvan,
> So, first of all, you need to clone the repo (which you probably already
> have done - but I will repeat the step anyway):
> $ hg clone amber-dev
> The above command will fetch the toplevel JDK repo and store it locally in
> the 'amber-dev' folder (you can change name of course if you want to). Note
> also that this will only fetch the 'toplevel' repo - JDK is currently
> organized as a 'forest' of repositories, so there's more than one you need
> to get - you can do so like this:
> $ sh
> This will fetch the remaining repositories - as some of these are big, it
> might take a while. This second step is temporary, and will go away once
> the repositories will be consolidated (an ongoing effort, see [1]).
> Now you should have a complete folder structure:
> amber-dev
>      jaxp
>      jaxws
>      langtools
>      hotspot
>      jdk
>      corba
>      nashorn
>      make
>      test
>      common
> So, since the amber repository is organized in branches, you need first to
> decide which branch you want to try out. Let's assume you want to try local
> variable type inference - the name of the branch is 'lvti' - so you need to
> update all JDK repositories to that branch, which you can do with this
> command:
> $ sh common/bin/ update lvti
> This will update the working version of all repositories to the latest
> 'lvti' changeset. Note that the 'hgforest' command above is a little useful
> helper that allows you to run the same command on all the JDK repos in the
> forest - so, by running the above command is like going into every repo
> subfolder and running 'hg update lvti' by hand.
> You can confirm that you have updated the repos to the right branch by
> doing the following:
> $ hg common/bin/hgforest branch
> This should print a list of lines such as
> jdk: lvti
> langtools: lvti
> ...
> Which indicates the repos are indeed in the right branch.
> Now it's time to build the JDK. To build, you first need to run the
> configuration step, which will test whether you have all the tools (such as
> GCC or Clang) and libraries (such as freetype) needed in order to build the
> JDK. You can do so as follows:
> $ sh configure --with-boot-jdk=<PATH-TO-JDK-8>
> The 'with-boot-jdk' parameter is very important - it's the JDK that is
> used to 'bootstrap' (e.g. to compile an initial version) of this JDK. It
> must point to an existing JDK 8 installation which you probably have
> somewhere in your machine. If not, go here [2] and fetch one.
> The configure should generate loads of output, but no errors. If there's
> an error it typically means that one (or more) build dependencies were not
> satisfied, so you need to take care of that (if you are in a debian-based
> Linux, this is typically done by installing some missing libraries -
> usually achieved by running some 'apt' command).
> After configure you are ready to go, really - so you can start the build:
> $ make images
> This will build the entire JDK and create an 'images' folder (under
> build/<arch>/images/jdk). Inside you will find a 'bin' folder containing
> all the usual commands (java, javac, javap, ...) which you can start using
> to try out local variable inference.
> This should cover the basics of the process, I expect there will be one or
> two peculiarities in your env that will pop up at some point (esp. at the
> configure step) - if you get stuck please do not hesitate to come back here
> and ask for help. There's also a mailing list of build experts (build-dev @
> o.j.n) in case things get nasty - but let's hope for the best :-)
> Cheers
> Maurizio
> [1] -
> /000451.html
> [2] -
> jdk8-downloads-2133151.html
> Regards,
>> Razvan

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