xz-5.8.2

[Bruce Dubbs]

New point version.

[Bruce Dubbs]

5.8.2 (2025-12-17)

liblzma:

• Fix the build on ARM64 on glibc versions older than 2.24 (2016). They don't have HWCAP_CRC32 in <sys/auxv.h>.

• Disable CLMUL CRC code when building for 32-bit x86 with old MSVC versions. This avoids a compiler bug. The exact compiler version in which the issue was fixed is unknown, but VS 2022 17.13 (MSVC 19.43.34808) is known to work, so CLMUL CRC on 32-bit x86 is disabled with MSVC versions older than that.

xz:

• Add a workaround for Red Hat Enterprise Linux 9 kernel bug which made xz fail with "xz: Failed to enable the sandbox". It only occurs with xz 5.8.0 and 5.8.1 binaries built for other distros. For example, running Debian 13 in a container on RHEL/CentOS 9 would trigger the issue.

The bug was introduced in RHEL 9 kernel 5.14.0-603.el9 (2025-07-30) and fixed in 5.14.0-648.el9 (2025-12-05). However, as of writing, the fixed kernel isn't available to RHEL 9 users yet, so including the workaround in this xz release seems reasonable. The workaround will be removed when it's no longer needed.

xzdec was also affected by this issue.

• On AIX, don't use fsync() on directories because it fails.

• Fix the build on Emscripten.

• Fix the build on clang-cl on Windows.

• Take resource limits (RLIMIT_DATA, RLIMIT_AS, and RLIMIT_VMEM) into account when determining the default memory usage limit for multithreaded mode. This should prevent xz from failing when a resource limit has been set to a value that is less than 1/4 of total RAM. Other memory limits can still trigger the same issue, for example, Linux cgroup v2 memory.max.

Build systems:

• When symbol versioning is enabled, pass --undefined-version to the linker if the option is supported. This fixes the build when using LLVM's lld and some liblzma features have been disabled at build time.

• ARM64: Fix autodetection of fast unaligned memory access when using GCC and -mstrict-align is in effect. Previously the build systems would incorrectly guess that unaligned access is fast, which would result in much slower binaries than needed. The fix is a workaround for GCC bug 111555; autodetection already worked with Clang.

• LoongArch: Autodetect if fast unaligned memory access is supported. This can improve compression speed by 15 % (but not decompression speed).

Translations

[Bruce Dubbs]

Fixed at commit 1fbf8a7e4f.