dev-libs / c-blosc

Blocking, shuffling and lossless compression library

Official package sites : ·

Blosc is a compression library designed to transmit data to the processor cache faster than the traditional non-compressed memory fetch. Compression ratios are not very high, but the decompression is very fast. Blosc is meant not only to reduce the size of large datasets on-disk or in-memory, but also to accelerate memory-bound computations.

v1.11.2 :: 0/1 :: gentoo

amd64 x86 ~amd64-linux ~x86-linux
USE flags
lz4 snappy static-libs test zlib zstd


Enable support for lz4 compression (as implemented in app-arch/lz4)
Enable support for Snappy compression (as implemented in app-arch/snappy)
Build static versions of dynamic libraries as well
Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)
Add support for zlib (de)compression
Enable support for ZSTD compression


Adds support for Advanced Vector Extensions 2 instructions

app-arch / lz4 : Extremely Fast Compression algorithm

app-arch / snappy : A high-speed compression/decompression library by Google

app-arch / zstd : zstd fast compression library

dev-util / cmake : Cross platform Make

sys-devel / make : Standard tool to compile source trees

sys-libs / zlib : Standard (de)compression library

app-arch / lz4 : Extremely Fast Compression algorithm

app-arch / snappy : A high-speed compression/decompression library by Google

app-arch / zstd : zstd fast compression library

sys-libs / zlib : Standard (de)compression library

dev-libs / libdynd : C++ dynamic multi-dimensionnal array library with Python exposure

dev-python / bcolz : Provides columnar and compressed data containers

dev-python / blosc : High performance compressor optimized for binary data

dev-python / pytables : Hierarchical datasets for Python

media-gfx / blender : 3D Creation/Animation/Publishing System

media-gfx / openvdb : Libs for the efficient manipulation of volumetric data

dev-python/pytables-3.3.0 with dev-libs/c-blosc-1.11.1[-zstd] fails tests - ValueError: compression library ``blosc:zstd`` is not supported; it must be one of: zlib, lzo, bzip2, blosc, blosc:blosclz, blosc:lz4, blosc:lz4hc, blosc:snappy, blosc:zlib
Repository mirror & CI · gentoo
Merge updates from master
Michał Górny · gentoo
*/*: [QA] Fix trivial cases of MissingTestRestrict
The result was achieved via the following pipeline: pkgcheck scan -c RestrictTestCheck -R FormatReporter \ --format '{category}/{package}/{package}-{version}.ebuild' | xargs -n32 grep -L RESTRICT | xargs -n32 sed -i -e '/^IUSE=.*test/aRESTRICT="!test? ( test )"' The resulting metadata was compared before and after the change. Few Go ebuilds had to be fixed manually due to implicit RESTRICT=strip added by the eclass. Two ebuilds have to be fixed because of multiline IUSE. Suggested-by: Robin H. Johnson <> Closes: Signed-off-by: Michał Górny <>
Benda Xu · gentoo
dev-libs/c-blosc: drop old versions.
Reported-by: Orivej Desh <> Closes: Package-Manager: Portage-2.3.16, Repoman-2.3.6
Agostino Sarubbo · gentoo
dev-libs/c-blosc: x86 stable wrt bug #606302
Package-Manager: Portage-2.3.6, Repoman-2.3.1 RepoMan-Options: --include-arches="x86" Signed-off-by: Agostino Sarubbo <>
Agostino Sarubbo · gentoo
dev-libs/c-blosc: amd64 stable wrt bug #606302
Package-Manager: Portage-2.3.5, Repoman-2.3.1 RepoMan-Options: --include-arches="amd64" Signed-off-by: Agostino Sarubbo <>
Robin H. Johnson · gentoo
Drop $Id$ per council decision in bug #611234.
Signed-off-by: Robin H. Johnson <>
Sébastien Fabbro · gentoo
dev-libs/c-blosc: version bump
Package-Manager: Portage-2.3.3, Repoman-2.3.1
T. Malfatti · gentoo
media-libs/portaudio: Version bump
David Seifert · gentoo
dev-libs/c-blosc: Version bump to 1.11.1
* EAPI=6 Package-Manager: portage-2.3.2
Robin H. Johnson · gentoo
proj/gentoo: Initial commit
This commit represents a new era for Gentoo: Storing the gentoo-x86 tree in Git, as converted from CVS. This commit is the start of the NEW history. Any historical data is intended to be grafted onto this point. Creation process: 1. Take final CVS checkout snapshot 2. Remove ALL ChangeLog* files 3. Transform all Manifests to thin 4. Remove empty Manifests 5. Convert all stale $Header$/$Id$ CVS keywords to non-expanded Git $Id$ 5.1. Do not touch files with -kb/-ko keyword flags. Signed-off-by: Robin H. Johnson <> X-Thanks: Alec Warner <> - did the GSoC 2006 migration tests X-Thanks: Robin H. Johnson <> - infra guy, herding this project X-Thanks: Nguyen Thai Ngoc Duy <> - Former Gentoo developer, wrote Git features for the migration X-Thanks: Brian Harring <> - wrote much python to improve cvs2svn X-Thanks: Rich Freeman <> - validation scripts X-Thanks: Patrick Lauer <> - Gentoo dev, running new 2014 work in migration X-Thanks: Michał Górny <> - scripts, QA, nagging X-Thanks: All of other Gentoo developers - many ideas and lots of paint on the bikeshed