Changes between Initial Version and Version 1 of Ticket #5430, comment 2


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Timestamp:
03/02/2024 04:43:15 AM (9 months ago)
Author:
Bruce Dubbs

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  • Ticket #5430, comment 2

    initial v1  
    1 XZ Utils Release Notes
    2 
    3 5.6.0 (2024-02-24)
    4    
    5     This bumps the minor version of liblzma because new features were
    6     added. The API and ABI are still backward compatible with liblzma
    7     5.4.x and 5.2.x and 5.0.x.
    8    
    9     NOTE: As described in the NEWS for 5.5.2beta, the core components
    10     are now under the BSD Zero Clause License (0BSD).
    11    
    12     Since 5.5.2beta:
    13    
    14     * liblzma:
    15        
    16         - Disabled the branchless C variant in the LZMA decoder based
    17           on the benchmark results from the community.
    18        
    19         - Disabled x86-64 inline assembly on x32 to fix the build.
    20    
    21     * Sandboxing support in xz:
    22        
    23         - Landlock is now used even when xz needs to create files.
    24           In this case the sandbox is has to be more permissive than
    25           when no files need to be created. A similar thing was
    26           already in use with pledge(2) since 5.3.4alpha.
    27        
    28         - Landlock and pledge(2) are now stricter when reading from
    29           more than one input file and only writing to standard output.
    30        
    31         - Added support for Landlock ABI version 4.
    32      * CMake:
    33        
    34         - Default to -O2 instead of -O3 with CMAKE_BUILD_TYPE=Release.
    35           -O3 is not useful for speed and makes the code larger.
    36        
    37         - Now builds lzmainfo and lzmadec.
    38        
    39         - xzdiff, xzgrep, xzless, xzmore, and their symlinks are now
    40           installed. The scripts are also tested during "make test".
    41        
    42         - Added translation support for xz, lzmainfo, and the
    43           man pages.
    44        
    45         - Applied the symbol versioning workaround for MicroBlaze that
    46           is used in the Autotools build.
    47        
    48         - The general XZ Utils and liblzma API documentation is now
    49           installed.
    50        
    51         - The CMake component names were changed a little and several
    52           were added. liblzma_Runtime and liblzma_Development are
    53           unchanged.
    54 
    55         - Minimum required CMake version is now 3.14. However,
    56           translation support is disabled with CMake versions
    57           older than 3.20.
    58 
    59         - The CMake-based build is now close to feature parity with the
    60           Autotools-based build. Most importantly a few tests aren't
    61           run yet. Testing the CMake-based build on different operating
    62           systems would be welcome now. See the comment at the top of
    63           CMakeLists.txt.
    64 
    65     * Fixed a bug in the Autotools feature test for ARM64 CRC32
    66       instruction support for old versions of Clang. This did not
    67       affect the CMake build.
    68       * The TODO file is no longer installed as part of the
    69       documentation. The file is out of date and does not reflect
    70       the actual tasks that will be completed in the future.
    71 
    72     * Translations
    73 
    74     * Added a few tests.
    75 
    76     Summary of new features added in the 5.5.x development releases:
    77 
    78     * liblzma:
    79 
    80         - LZMA decoder: Speed optimizations to the C code and
    81           added GCC & Clang compatible inline assembly for x86-64.
    82 
    83         - Added lzma_mt_block_size() to recommend a Block size for
    84           multithreaded encoding.
    85 
    86         - Added CLMUL-based CRC32 on x86-64 and E2K with runtime
    87           processor detection. Similar to CRC64, on 32-bit x86 it
    88           isn't available unless --disable-assembler is used.
    89 
    90         - Optimized the CRC32 calculation on ARM64 platforms using the
    91           CRC32 instructions. Runtime detection for the instruction is
    92           used on GNU/Linux, FreeBSD, Windows, and macOS. If the
    93           compiler flags indicate unconditional CRC32 instruction
    94           support (+crc) then the generic version is not built.
    95 
    96         - Added definitions of mask values like
    97           LZMA_INDEX_CHECK_MASK_CRC32 to <lzma/index.h>.
    98     * xz:
    99 
    100         - Multithreaded mode is now the default. This improves
    101           compression speed and creates .xz files that can be
    102           decompressed in multithreaded mode. The downsides are
    103           increased memory usage and slightly worse compression ratio.
    104 
    105         - Added a new command line option --filters to set the filter
    106           chain using the liblzma filter string syntax.
    107 
    108         - Added new command line options --filters1 ... --filters9 to
    109           set additional filter chains using the liblzma filter string
    110           syntax. The --block-list option now allows specifying filter
    111           chains that were set using these new options.
    112 
    113         - Ported the command line tools to Windows MSVC.
    114           Visual Studio 2015 or later is required.
    115 
    116     * Added lz4 support to xzdiff/xzcmp and xzgrep.
    117 
    118 
    119  
     1Deleted.