Add NEWS for 5.6.0.
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XZ Utils Release Notes
======================
+5.6.0 (2024-02-24)
+
+ This bumps the minor version of liblzma because new features were
+ added. The API and ABI are still backward compatible with liblzma
+ 5.4.x and 5.2.x and 5.0.x.
+
+ NOTE: As described in the NEWS for 5.5.2beta, the core components
+ are now under the BSD Zero Clause License (0BSD).
+
+ Since 5.5.2beta:
+
+ * liblzma:
+
+ - Disabled the branchless C variant in the LZMA decoder based
+ on the benchmark results from the community.
+
+ - Disabled x86-64 inline assembly on x32 to fix the build.
+
+ * Sandboxing support in xz:
+
+ - Landlock is now used even when xz needs to create files.
+ In this case the sandbox is has to be more permissive than
+ when no files need to be created. A similar thing was
+ already in use with pledge(2) since 5.3.4alpha.
+
+ - Landlock and pledge(2) are now stricter when reading from
+ more than one input file and only writing to standard output.
+
+ - Added support for Landlock ABI version 4.
+
+ * CMake:
+
+ - Default to -O2 instead of -O3 with CMAKE_BUILD_TYPE=Release.
+ -O3 is not useful for speed and makes the code larger.
+
+ - Now builds lzmainfo and lzmadec.
+
+ - xzdiff, xzgrep, xzless, xzmore, and their symlinks are now
+ installed. The scripts are also tested during "make test".
+
+ - Added translation support for xz, lzmainfo, and the
+ man pages.
+
+ - Applied the symbol versioning workaround for MicroBlaze that
+ is used in the Autotools build.
+
+ - The general XZ Utils and liblzma API documentation is now
+ installed.
+
+ - The CMake component names were changed a little and several
+ were added. liblzma_Runtime and liblzma_Development are
+ unchanged.
+
+ - Minimum required CMake version is now 3.14. However,
+ translation support is disabled with CMake versions
+ older than 3.20.
+
+ - The CMake-based build is now close to feature parity with the
+ Autotools-based build. Most importantly a few tests aren't
+ run yet. Testing the CMake-based build on different operating
+ systems would be welcome now. See the comment at the top of
+ CMakeLists.txt.
+
+ * Fixed a bug in the Autotools feature test for ARM64 CRC32
+ instruction support for old versions of Clang. This did not
+ affect the CMake build.
+
+ * Windows:
+
+ - The build instructions in INSTALL and windows/INSTALL*.txt
+ were revised completely.
+
+ - windows/build-with-cmake.bat along with the instructions
+ in windows/INSTALL-MinGW-w64_with_CMake.txt should make
+ it very easy to build liblzma.dll and xz.exe on Windows
+ using CMake and MinGW-w64 with either GCC or Clang/LLVM.
+
+ - windows/build.bash was updated. It now works on MSYS2 and
+ on GNU/Linux (cross-compiling) to create a .zip and .7z
+ package for 32-bit and 64-bit x86 using GCC + MinGW-w64.
+
+ * The TODO file is no longer installed as part of the
+ documentation. The file is out of date and does not reflect
+ the actual tasks that will be completed in the future.
+
+ * Translations:
+
+ - Translated lzmainfo man pages are now installed. These
+ had been forgotten in earlier versions.
+
+ - Updated Croatian, Esperanto, German, Hungarian, Korean,
+ Polish, Romanian, Spanish, Swedish, Vietnamese, and Ukrainian
+ translations.
+
+ - Updated German, Korean, Romanian, and Ukrainian man page
+ translations.
+
+ * Added a few tests.
+
+ Summary of new features added in the 5.5.x development releases:
+
+ * liblzma:
+
+ - LZMA decoder: Speed optimizations to the C code and
+ added GCC & Clang compatible inline assembly for x86-64.
+
+ - Added lzma_mt_block_size() to recommend a Block size for
+ multithreaded encoding.
+
+ - Added CLMUL-based CRC32 on x86-64 and E2K with runtime
+ processor detection. Similar to CRC64, on 32-bit x86 it
+ isn't available unless --disable-assembler is used.
+
+ - Optimized the CRC32 calculation on ARM64 platforms using the
+ CRC32 instructions. Runtime detection for the instruction is
+ used on GNU/Linux, FreeBSD, Windows, and macOS. If the
+ compiler flags indicate unconditional CRC32 instruction
+ support (+crc) then the generic version is not built.
+
+ - Added definitions of mask values like
+ LZMA_INDEX_CHECK_MASK_CRC32 to <lzma/index.h>.
+
+ * xz:
+
+ - Multithreaded mode is now the default. This improves
+ compression speed and creates .xz files that can be
+ decompressed in multithreaded mode. The downsides are
+ increased memory usage and slightly worse compression ratio.
+
+ - Added a new command line option --filters to set the filter
+ chain using the liblzma filter string syntax.
+
+ - Added new command line options --filters1 ... --filters9 to
+ set additional filter chains using the liblzma filter string
+ syntax. The --block-list option now allows specifying filter
+ chains that were set using these new options.
+
+ - Ported the command line tools to Windows MSVC.
+ Visual Studio 2015 or later is required.
+
+ * Added lz4 support to xzdiff/xzcmp and xzgrep.
+
+
5.5.2beta (2024-02-14)
* Licensing change: The core components are now under the
