Re: zip and unzip

On Fri, Dec 13, 2019 at 6:10 AM LM <[email protected]> wrote:

> Not sure if this should go to BLFS or this list, but I think it's a bit
> off-topic for BLFS, so I'll post here.  I've been looking at the various
> patches available from different operating systems for Info-Zip's zip and
> unzip programs.  I've also been looking at different build scripts
> including the build instructions on the BLFS site.  Both zip and unzip can
> be built with or without bzip2 and zlib library support.  Adding bzip2
> makes sense since it adds support for more formats.  I believe the BLFS
> builds do end up bringing in the bzip2 library.  I'm wondering about the
> zlib support though.  According to the code, it looks like it can use its
> own functions and CRC tables or it could use some of zlib's functions and
> CRC table.  Am wondering what the pros and cons would be to using zlib
> functions over what's built into zip and unzip.  Also, noticed on one
> mailing list that at least one distribution is using the beta versions of
> zip and unzip (
> https://sourceforge.net/projects/infozip/files/unreleased%20Betas/ ).
> Don't know if they're any better or how stable they are, but there seem to
> be a lot of fixes for Unicode support in them.
>
> Does anyone else enjoy looking at the code they're building and trying to
> apply the most useful patches and settings?  I find it very interesting
> reading through the various patches and build settings and trying to figure
> out what would be optimal on my system.  Unfortunately, I don't know of any
> good places to discuss topics like that.  If there are better places to
> discuss that sort of thing, please let me know.  Would be interesting to
> know the logic behind what patches get put into a distribution and what
> gets left out.  Some decisions are really evident.  However, with others,
> it would be helpful to know the rationale behind the decisions.  I know
> some distributions try to make as few changes to the upstream code as
> possible.  That philosophy doesn't work well for me though.  Personally, I
> tend to do the opposite and make as many changes as I need to get things
> working the way I want.
>
> If anyone has any experiences to share with building zip and unzip,
> especially if they've looked into the various build settings and the
> possibility of using zlib, I'd be very interested to hear about it.  Thanks.
>
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This definitely goes with BLFS, as the main book doesn't worry about
building zip, unzip, or expand on patches past the required. Otherwise, I
find that I'd rather patch for security instead of patching for extra
features.

Flareon Zulu

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