--- Begin Message ---
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Subject: |
New Java bootstrap |
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Date: |
Wed, 17 May 2017 19:06:03 +0200 |
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User-agent: |
mu4e 0.9.18; emacs 25.2.1 |
This patch series removes GCJ and bootstraps the JDK with Jikes.
Up to now our Java bootstrap with GCJ involved nasty compromises:
* GCJ depended on an iterative Java compiler in the form of a binary of
ECJ (the Eclipse compiler for Java)
* The GCJ sources include pre-compiled Java .class files coming from
the GNU Classpath project.
I only learned of the second of these problems when I expressed my
sadness about the removal of GCJ and Andrew Haley replied that GCJ
depended on binaries to a larger extent than I was aware of.
Recently Ludo brought up Jikes on #guix and while it first looked like a
much less capable compiler (only implementing a limited set of Java 1.5)
it turned out to be enough to get a first bootstrap JDK built. After
some experimentation I managed to build a version of ECJ from source,
which eventually led the way to a properly bootstrapped JDK with IcedTea.
Note that some work is still needed to make it all fully reproducible,
but that’s not the primary goal of this patch set.
--
Ricardo
GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC
https://elephly.net
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--- Begin Message ---
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Subject: |
Re: bug#26966: New Java bootstrap |
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Date: |
Mon, 22 May 2017 19:03:39 +0200 |
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User-agent: |
mu4e 0.9.18; emacs 25.2.1 |
Roel Janssen <address@hidden> writes:
> Ricardo Wurmus writes:
>
>> This patch series removes GCJ and bootstraps the JDK with Jikes.
>>
>> Up to now our Java bootstrap with GCJ involved nasty compromises:
>>
>> * GCJ depended on an iterative Java compiler in the form of a binary of
>> ECJ (the Eclipse compiler for Java)
>>
>> * The GCJ sources include pre-compiled Java .class files coming from
>> the GNU Classpath project.
>>
>> I only learned of the second of these problems when I expressed my
>> sadness about the removal of GCJ and Andrew Haley replied that GCJ
>> depended on binaries to a larger extent than I was aware of.
>>
>> Recently Ludo brought up Jikes on #guix and while it first looked like a
>> much less capable compiler (only implementing a limited set of Java 1.5)
>> it turned out to be enough to get a first bootstrap JDK built. After
>> some experimentation I managed to build a version of ECJ from source,
>> which eventually led the way to a properly bootstrapped JDK with IcedTea.
>>
>> Note that some work is still needed to make it all fully reproducible,
>> but that’s not the primary goal of this patch set.
>
> Overall, this patch series looks fine to me. Great effort, great job!
Thank you for the review! I pushed it to master with commit 9117448e7.
--
Ricardo
GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC
https://elephly.net
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