Releases: tukaani-project/xz
Releases · tukaani-project/xz
XZ 5.2.11 Old Stable
5.2.11 (2023-03-18)
* Removed all possible cases of null pointer + 0. It is undefined
behavior in C99 and C17. This was detected by a sanitizer and had
not caused any known issues.
* Build systems:
- Added a workaround for building with GCC on MicroBlaze Linux.
GCC 12 on MicroBlaze doesn't support the __symver__ attribute
even though __has_attribute(__symver__) returns true. The
build is now done without the extra RHEL/CentOS 7 symbols
that were added in XZ Utils 5.2.7. The workaround only
applies to the Autotools build (not CMake).
- CMake: Ensure that the C compiler language is set to C99 or
a newer standard.
- CMake changes from XZ Utils 5.4.1:
* Added a workaround for a build failure with
windres from GNU binutils.
* Included the Windows resource files in the xz
and xzdec build rules.
5.4.1 Stable
5.4.1 (2023-01-11)
* liblzma:
- Fixed the return value of lzma_microlzma_encoder() if the
LZMA options lc/lp/pb are invalid. Invalid lc/lp/pb options
made the function return LZMA_STREAM_END without encoding
anything instead of returning LZMA_OPTIONS_ERROR.
- Windows / Visual Studio: Workaround a possible compiler bug
when targeting 32-bit x86 and compiling the CLMUL version of
the CRC64 code. The CLMUL code isn't enabled by the Windows
project files but it is in the CMake-based builds.
* Build systems:
- Windows-specific CMake changes:
* Don't try to enable CLMUL CRC64 code if _mm_set_epi64x()
isn't available. This fixes CMake-based build with Visual
Studio 2013.
* Created a workaround for a build failure with windres
from GNU binutils. It is used only when the C compiler
is GCC (not Clang). The workaround is incompatible
with llvm-windres, resulting in "XZx20Utils" instead
of "XZ Utils" in the resource file, but without the
workaround llvm-windres works correctly. See the
comment in CMakeLists.txt for details.
* Included the resource files in the xz and xzdec build
rules. Building the command line tools is still
experimental but possible with MinGW-w64.
- Visual Studio: Added stream_decoder_mt.c to the project
files. Now the threaded decompressor lzma_stream_decoder_mt()
gets built. CMake-based build wasn't affected.
- Updated windows/INSTALL-MSVC.txt to mention that CMake-based
build is now the preferred method with Visual Studio. The
project files will probably be removed after 5.4.x releases.
- Changes to #defines in config.h:
* HAVE_DECL_CLOCK_MONOTONIC was replaced by
HAVE_CLOCK_MONOTONIC. The old macro was always defined
in configure-generated config.h to either 0 or 1. The
new macro is defined (to 1) only if the declaration of
CLOCK_MONOTONIC is available. This matches the way most
other config.h macros work and makes things simpler with
other build systems.
* HAVE_DECL_PROGRAM_INVOCATION_NAME was replaced by
HAVE_PROGRAM_INVOCATION_NAME for the same reason.
* Tests:
- Fixed test script compatibility with ancient /bin/sh
versions. Now the five test_compress_* tests should
no longer fail on Solaris 10.
- Added and refactored a few tests.
* Translations:
- Updated the Catalan and Esperanto translations.
- Added Korean and Ukrainian man page translations.
5.4.0 Stable
5.4.0 (2022-12-13)
This bumps the minor version of liblzma because new features were
added. The API and ABI are still backward compatible with liblzma
5.2.x and 5.0.x.
Since 5.3.5beta:
* All fixes from 5.2.10.
* The ARM64 filter is now stable. The xz option is now --arm64.
Decompression requires XZ Utils 5.4.0. In the future the ARM64
filter will be supported by XZ for Java, XZ Embedded (including
the version in Linux), LZMA SDK, and 7-Zip.
* Translations:
- Updated Catalan, Croatian, German, Romanian, and Turkish
translations.
- Updated German man page translations.
- Added Romanian man page translations.
Summary of new features added in the 5.3.x development releases:
* liblzma:
- Added threaded .xz decompressor lzma_stream_decoder_mt().
It can use multiple threads with .xz files that have multiple
Blocks with size information in Block Headers. The threaded
encoder in xz has always created such files.
Single-threaded encoder cannot store the size information in
Block Headers even if one used LZMA_FULL_FLUSH to create
multiple Blocks, so this threaded decoder cannot use multiple
threads with such files.
If there are multiple Streams (concatenated .xz files), one
Stream will be decompressed completely before starting the
next Stream.
- A new decoder flag LZMA_FAIL_FAST was added. It makes the
threaded decompressor report errors soon instead of first
flushing all pending data before the error location.
- New Filter IDs:
* LZMA_FILTER_ARM64 is for ARM64 binaries.
* LZMA_FILTER_LZMA1EXT is for raw LZMA1 streams that don't
necessarily use the end marker.
- Added lzma_str_to_filters(), lzma_str_from_filters(), and
lzma_str_list_filters() to convert a preset or a filter chain
string to a lzma_filter[] and vice versa. These should make
it easier to write applications that allow users to specify
custom compression options.
- Added lzma_filters_free() which can be convenient for freeing
the filter options in a filter chain (an array of lzma_filter
structures).
- lzma_file_info_decoder() to makes it a little easier to get
the Index field from .xz files. This helps in getting the
uncompressed file size but an easy-to-use random access
API is still missing which has existed in XZ for Java for
a long time.
- Added lzma_microlzma_encoder() and lzma_microlzma_decoder().
It is used by erofs-utils and may be used by others too.
The MicroLZMA format is a raw LZMA stream (without end marker)
whose first byte (always 0x00) has been replaced with
bitwise-negation of the LZMA properties (lc/lp/pb). It was
created for use in EROFS but may be used in other contexts
as well where it is important to avoid wasting bytes for
stream headers or footers. The format is also supported by
XZ Embedded (the XZ Embedded version in Linux got MicroLZMA
support in Linux 5.16).
The MicroLZMA encoder API in liblzma can compress into a
fixed-sized output buffer so that as much data is compressed
as can be fit into the buffer while still creating a valid
MicroLZMA stream. This is needed for EROFS.
- Added lzma_lzip_decoder() to decompress the .lz (lzip) file
format version 0 and the original unextended version 1 files.
Also lzma_auto_decoder() supports .lz files.
- lzma_filters_update() can now be used with the multi-threaded
encoder (lzma_stream_encoder_mt()) to change the filter chain
after LZMA_FULL_BARRIER or LZMA_FULL_FLUSH.
- In lzma_options_lzma, allow nice_len = 2 and 3 with the match
finders that require at least 3 or 4. Now it is internally
rounded up if needed.
- CLMUL-based CRC64 on x86-64 and E2K with runtime processor
detection. On 32-bit x86 it currently isn't available unless
--disable-assembler is used which can make the non-CLMUL
CRC64 slower; this might be fixed in the future.
- Building with --disable-threads --enable-small
is now thread-safe if the compiler supports
__attribute__((__constructor__)).
* xz:
- Using -T0 (--threads=0) will now use multi-threaded encoder
even on a single-core system. This is to ensure that output
from the same xz binary is identical on both single-core and
multi-core systems.
- --threads=+1 or -T+1 is now a way to put xz into
multi-threaded mode while using only one worker thread.
The + is ignored if the number is not 1.
- A default soft memory usage limit is now used for compression
when -T0 is used and no explicit limit has been specified.
This soft limit is used to restrict the number of threads
but if the limit is exceeded with even one thread then xz
will continue with one thread using the multi-threaded
encoder and this limit is ignored. If the number of threads
is specified manually then no default limit will be used;
this affects only -T0.
This change helps on systems that have very many cores and
using all of them for xz makes no sense. Previously xz -T0
could run out of memory on such systems because it attempted
to reserve memory for too many threads.
This also helps with 32-bit builds which don't have a large
amount of address space that would be required for many
threads. The default soft limit for -T0 is at most 1400 MiB
on all 32-bit platforms.
- Previously a low value in --memlimit-compress wouldn't cause
xz to switch from multi-threaded mode to single-threaded mode
if the limit cannot otherwise be met; xz failed instead. Now
xz can switch to single-threaded mode and then, if needed,
scale down the LZMA2 dictionary size too just like it already
did when it was started in single-threaded mode.
- The option --no-adjust no longer prevents xz from scaling down
the number of threads as that doesn't affect the compressed
output (only performance). Now --no-adjust only prevents
adjustments that affect compressed output, that is, with
--no-adjust xz won't switch from multi-threaded mode to
single-threaded mode and won't scale down the LZMA2
dictionary size.
- Added a new option --memlimit-mt-decompress=LIMIT. This is
used to limit the number of decompressor threads (possibly
falling back to single-threaded mode) but it will never make
xz refuse to decompress a file. This has a system-specific
default value because without any limit xz could end up
allocating memory for the whole compressed input file, the
whole uncompressed output file, multiple thread-specific
decompressor instances and so on. Basically xz could
attempt to use an insane amount of memory even with fairly
common files. The system-specific default value is currently
the same as the one used for compression with -T0.
The new option works together with the existing option
--memlimit-decompress=LIMIT. The old option sets a hard limit
that must not be exceeded (xz will refuse to decompress)
while the new option only restricts the number of threads.
If the limit set with --memlimit-mt-decompress is greater
than the limit set with --memlimit-compress, then the latter
value is used also for --memlimit-mt-decompress.
- Added new information to the output of xz --info-memory and
new fields to the output of xz --robot --info-memory.
- In --lzma2=nice=NUMBER allow 2 and 3 with all match finders
now that liblzma handles it.
- Don't mention endianness for ARM and ARM-Thumb filters in
--long-help. The filters only work for little endian
instruction encoding but modern ARM processors using
big endian data access still use little endian
instruction encoding. So the help text was misleading.
In contrast, the PowerPC filter is only for big endian
32/64-bit PowerPC code. Little endian PowerPC would need
a separate filter.
- Added decompression support for the .lz (lzip) file format
version 0 and the original unextended version 1. It is
autodetected by default. See also the option --format on
the xz man page.
- Sandboxing enabled by default:
* Capsicum (FreeBSD)
* pledge(2) (OpenBSD)
* Scripts now support the .lz format using xz.
* A few new tests were added.
* The liblzma-specific tests are now supported in CMake-based
builds too ("make test").
5.2.10 Stable
5.2.10 (2022-12-13)
* xz: Don't modify argv[] when parsing the --memlimit* and
--block-list command line options. This fixes confusing
arguments in process listing (like "ps auxf").
* GNU/Linux only: Use __has_attribute(__symver__) to detect if
that attribute is supported. This fixes build on Mandriva where
Clang is patched to define __GNUC__ to 11 by default (instead
of 4 as used by Clang upstream).