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#5836: xz-5.8.2
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Reporter: Bruce Dubbs | Owner: lfs-book
Type: enhancement | Status: new
Priority: normal | Milestone: 12.5
Component: Book | Version: git
Severity: normal | Resolution:
Keywords: |
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Comment (by 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
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Ticket URL: <https://wiki.linuxfromscratch.org/lfs/ticket/5836#comment:1>
LFS Trac <https://wiki.linuxfromscratch.org/lfs/>
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