How to trim some more fat OpenJDK 8

[Medi Montaseri]

I think you are right...sorry about that...

Medi
________________________________________
From: David Holmes [david.holmes at oracle.com]
Sent: Wednesday, February 26, 2014 6:40 PM
To: Medi Montaseri; jtreg-use at openjdk.java.net
Subject: Re: How to trim some more fat OpenJDK 8

Hi Medi,

You've sent this to the wrong mailing list.

I would suggest build-dev at openjdk.java.net.

David

On 27/02/2014 12:33 PM, Medi Montaseri wrote:
> Hi,
>
> I am building OpenJDK 8 for a tight environment and would like to have a
> very small JDK (or I should say JRE) footprint....sort of like headless
> but even more.
>
> I would like to do this from the configure(1) as much as possible. And
> then resort to rm(1).
>
> Here is build result on amd64 Debian 7.3 without any trimming
>
> mmontaseri at griffin:~/work/bug-91383/openjdk8> du -sh *
> 168K    bin                           # these are all symlinks to jvm/bin
> 269M    jvm
>
> too much...I need to get down to under 30 Meg. So I build again with
> configure --disable-headful --disable-debug-symbols
> --disable-zip-debug-info
> and I get the following result
>
> mmontaseri at griffin:~/work/bug-91383/depot2> du -sh *
> 168K    bin
> 168M    jvm                   # went down from 296M to 168M
>
> That is good, but not good enough....I then looked around and found
> about 66 Meg of *.diz files. We don't need these.
>
> Q1- is there any configure option to not produce *.diz files (gdb debug
> info for .so files). If not, then I have to rm(1) them.
>
> Q2- I see two lib directories under jvm/openjdk-1.8.0-internal
> mmontaseri at griffin:~/work/bug-91383/depot2/jvm/openjdk-1.8.0-internal>
> du -sh jre/*
> 4.0K    jre/ASSEMBLY_EXCEPTION
> 272K    jre/bin
> 97M     jre/lib
> 20K     jre/LICENSE
> 180K    jre/THIRD_PARTY_README
> mmontaseri at griffin:~/work/bug-91383/depot2/jvm/openjdk-1.8.0-internal>
> du -sh lib
> 38M     lib
> Can you help me understand the difference between lib/* and jre/lib
>
> I see debian has created a set of packages on OpenJDK 7, like so
> ii  openjdk-7-jdk:amd64
> 7u25-2.3.10-1~deb7u1                    amd64        OpenJDK Development
> Kit (JDK)
> ii  openjdk-7-jre:amd64
> 7u25-2.3.10-1~deb7u1                     amd64        OpenJDK Java
> runtime, using Hotspot JIT
> ii  openjdk-7-jre-headless:amd64
> 7u25-2.3.10-1~deb7u1                amd64        OpenJDK Java runtime,
> using Hotspot JIT (headless)
> ii  openjdk-7-jre-lib
> 7u25-2.3.10-1~deb7u1                           all              OpenJDK
> Java runtime (architecture independent libraries)
>
>
>
> thanks
> Medi
>
>