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Bug 666934 - net-misc/rsync: allow using system zlib instead of bundled
Summary: net-misc/rsync: allow using system zlib instead of bundled
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo's Team for Core System packages
Depends on:
Blocks: bundled-libs
  Show dependency tree
Reported: 2018-09-24 00:03 UTC by Ian Leonard
Modified: 2020-06-19 23:18 UTC (History)
4 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description Ian Leonard 2018-09-24 00:03:15 UTC
Rsync allows building against its bundled zlib or the system zlib via the --with(out)-included-zlib flag to configure. This hasn't been done previously as rsync has a customized zlib bundled to aid in its stream compression. However, since rsync-3.1.1, it has been able to use the bundled zlib (by way of --old-compress) or system zlib (by way of --new-compress) to allow syncing with rsyncd that was built with the opposite zlib choice of the client.

When using system zlib, PORTAGE_RSYNC_EXTRA_OPTS should include "--new-compress" to allow syncing against gentoo's rsync servers. Otherwise, emerge --sync will fail.
Comment 1 Lars Wendler (Polynomial-C) (RETIRED) gentoo-dev 2018-09-24 21:30:18 UTC
Thank you for your contribution.
The base-system team is currently discussing the potential negative influence on our portage rsync mirrors.
Once we have come to a positive conclusion we might apply this change.
Comment 2 Patrick McLean gentoo-dev 2018-09-25 01:37:40 UTC
Adding the portage team to the CC list
Comment 3 Mike Gilbert gentoo-dev 2018-09-25 15:29:18 UTC
Given the incompatibility system zlib would cause, I would suggest disabling it by default for a lengthy period.

Maybe we could enable system zlib by default several years after new compression becomes the default option in rsync.
Comment 4 Larry the Git Cow gentoo-dev 2020-06-16 10:15:37 UTC
The bug has been referenced in the following commit(s):

commit b2140e1b35fe5a8a1703c199ef5080c786fe4b49
Author:     Lars Wendler <>
AuthorDate: 2020-06-16 10:15:16 +0000
Commit:     Lars Wendler <>
CommitDate: 2020-06-16 10:15:32 +0000

    net-misc/rsync: Bump to version 3.2.0_pre2
    Added support for system-zlib
    Package-Manager: Portage-2.3.101, Repoman-2.3.22
    Signed-off-by: Lars Wendler <>

 net-misc/rsync/Manifest                |   1 +
 net-misc/rsync/metadata.xml            |   2 +
 net-misc/rsync/rsync-3.2.0_pre2.ebuild | 114 +++++++++++++++++++++++++++++++++
 3 files changed, 117 insertions(+)