[oe] [meta-java] openjdk vs openjre recipe history

[Richard Leitner]

Hi,

On 08/04/2018 12:01 PM, André Draszik wrote:
> Hi,
> 
> Does anybody know why there are openjdk & openjre recipes, rather than just
> one recipe creating mulitple runtime packages?

I guess you are talking about openjdk/jre 8, as openjdk and jre 7 are within
one recipe.

The initial openjdk-8 commit bac3b9acee5110390d15d38dacdb1622e31b2238 was
done by Jens, so maybe he could provide some more details?

In his commit message it sounds like he intended to do separate recipes
because of a stripped openjre-8 and avoiding cherry-picking files...


commit bac3b9acee5110390d15d38dacdb1622e31b2238
Author: Jens Rehsack <rehsack at gmail.com>
Date:   Tue Dec 8 14:52:51 2015 +0100

    openjdk-8: add recipes for openjdk-8 and openjre-8
    
    This adds openjdk-8 for native and target builds and allows a stripped
    openjre-8 being built as well instead of trying to cherry-pick jre
    components from jdk-image.
    
    The recipes allow building openjdk-8 with or without:
    * x11
    * cups
    * alsa/pulseaudio
    and let packager enable unlimited-crypto, if desired.
    
    To support certificate based java libraries, cacerts is created based on
    ca-certificates from OE-core.
    
    Since there can be only one PROVIDES for virtual/java-native and virtual/javac-native,
    move the provides to openjdk-8-native (I think everyone agrees it's a better
    choice than ecj-bootstrap-native).
    
    Plus: Applying a fix from openjdk-9 repository which fixes build issues using gcc5

> 
> With the current approach, we get
> * a JRE from the openjdk recipe
> * a (separately compiled) JRE from the openjre recipe
> even though they are compiled from the same sources
> 
> And you also have to constantly modify your PREFERRED_PROVIDER java2-vm /
> java2-runtime based on the image you want to build, e.g. building an image
> that wants to install openjdk, but your preferred provider is openjre, gives
> you lots of warnings from bitbake, meaning you have to update your preferred
> provider.
> 
> This isn't very intuitive to say the least.
> 
> Other distros (or debian at least), just create multiple packages from the
> same recipe, i.e. there is one openjdk source, which creates both the
> runtime only package, and the compiler in a separate package, amongst other
> things.
> 
> 
> Cheers,
> Andre'
>