PATCH: Tired of waiting for rt.jar to build?

Martin Buchholz martinrb at
Thu Sep 10 15:01:11 UTC 2009

Hi Andrew,

I don't recall all the details, but I probably backported all-at-once
because it was a little easier for me to do so - it reflected the
engineering that was actually done.   I care more about
the quality of the openjdk7 mercurial history.  In this case
the information *is* available to allow a future maintainer
to do archaeological investigations.  I agree it would have
been a little cleaner to backport each change individually.

You also correctly notice that not all discussions end up
on core-libs-dev.  In part this is a cultural heritage - tradition
is private, not public, peer review.  I have been trying,
and have been encouraging others, to make discussions
more public, even when we might perceive them to be
uninteresting to others.  (What can be said about a backport,
except whether it's worth doing, one might think.)

Thanks for the culture change prodding.


On Thu, Sep 10, 2009 at 06:01, Andrew John
Hughes<gnu_andrew at> wrote:
> 2009/4/29 Martin Buchholz <martinrb at>:
>> Since writing this, I have learned, to my horror, that the
>> behavior of the -C flag differs from the behavior in tar in that
>> - -C is not sticky - it applies only to the one following argument
>> - the path is relative to the JDK's current directory, not the
>> previous -C directory.
>> despite assurances from jar(1)
>>          -C  dir
>>             Temporarily changes directories (cd dir) during execution of the
>>             jar command while processing the following inputfiles argument.
>>             Its operation is intended to be similar to the -C option of the
>>             UNIX tar utility.
>> If you squint, you can see that it says "argument", not "arguments".
>> Martin
>> On Mon, Apr 27, 2009 at 17:54, Martin Buchholz <martinrb at> wrote:
>>>  I believe the better fix would be
>>> to eviscerate the code that handles the "-C" flag and do it right,
>>> Someone who cares about the Makefiles can also try to remove the
>>> 16000 gratuitous -C flags that makes jar's life "jar hell".
>>> Martin
> Martin,
> Thanks a lot for this patch.  We've seen good speedups with it applied.
> The thread here reads very strangely; did a number of mails go to a
> different mail list or only to private mail addresses?
> There's also seems to be no mention of this being applied to OpenJDK6:
> That changeset seems to have been merged together with several others;
> was there a reason the changesets were not imported individually so as
> to retain the history?
> Thanks,
> --
> Andrew :-)
> Free Java Software Engineer
> Red Hat, Inc. (
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