Merge pull request #4635 from facebook/dependabot/github_actions/msys2/setup-msys2-2.31.0

Bump msys2/setup-msys2 from 2.30.0 to 2.31.0

Merge pull request #4636 from facebook/dependabot/github_actions/github/codeql-action-4.35.1

Bump github/codeql-action from 4.31.2 to 4.35.1

Merge pull request #4634 from facebook/dependabot/github_actions/android-actions/setup-android-4.0.0

Bump android-actions/setup-android from 3.2.2 to 4.0.0

Merge pull request #4633 from facebook/dependabot/github_actions/microsoft/setup-msbuild-3.0.0

Bump microsoft/setup-msbuild from 2.0.0 to 3.0.0

Bump github/codeql-action from 4.31.2 to 4.35.1

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 4.31.2 to 4.35.1.
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/github/codeql-action/compare/0499de31b99561a6d14a36a5f662c2a54f91beee...c10b8064de6f491fea524254123dbe5e09572f13)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-version: 4.35.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump msys2/setup-msys2 from 2.30.0 to 2.31.0

Bumps [msys2/setup-msys2](https://github.com/msys2/setup-msys2) from 2.30.0 to 2.31.0.
- [Release notes](https://github.com/msys2/setup-msys2/releases)
- [Changelog](https://github.com/msys2/setup-msys2/blob/main/CHANGELOG.md)
- [Commits](https://github.com/msys2/setup-msys2/compare/4f806de0a5a7294ffabaff804b38a9b435a73bda...cafece8e6baf9247cf9b1bf95097b0b983cc558d)

---
updated-dependencies:
- dependency-name: msys2/setup-msys2
  dependency-version: 2.31.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump android-actions/setup-android from 3.2.2 to 4.0.0

Bumps [android-actions/setup-android](https://github.com/android-actions/setup-android) from 3.2.2 to 4.0.0.
- [Release notes](https://github.com/android-actions/setup-android/releases)
- [Commits](https://github.com/android-actions/setup-android/compare/9fc6c4e9069bf8d3d10b2204b1fb8f6ef7065407...651bceb6f9ca583f16b8d75b62c36ded2ae6fc9c)

---
updated-dependencies:
- dependency-name: android-actions/setup-android
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump microsoft/setup-msbuild from 2.0.0 to 3.0.0

Bumps [microsoft/setup-msbuild](https://github.com/microsoft/setup-msbuild) from 2.0.0 to 3.0.0.
- [Release notes](https://github.com/microsoft/setup-msbuild/releases)
- [Commits](https://github.com/microsoft/setup-msbuild/compare/6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce...30375c66a4eea26614e0d39710365f22f8b0af57)

---
updated-dependencies:
- dependency-name: microsoft/setup-msbuild
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Merge pull request #4626 from kevinjzhang/fix-high-memory-usage

Fix unintended high memory usage

Fix unintended high memory usage

Merge pull request #4613 from nidu-ninja/null-deref-custom-calloc

Fix potential NULL pointer dereference in ZSTD_customCalloc when cust…

Merge pull request #4606 from jlee303/update_manual

Update manual/error message

Merge pull request #4619 from jlee303/display_option_c

Promote -c flag

Merge pull request #4620 from jlee303/defineable_cflags

Make DISPLAY_LEVEL_DEFAULT configurable at compile time

Merge pull request #4609 from Integral-Tech/memory-g-suffix

Accept G, GB and GiB suffixes for options

fix display format

rever -q

Update #define format

Add tests for options with G, GB and GiB suffixes

init commit

Update tests

Promote flag

Fix potential NULL pointer dereference in ZSTD_customCalloc when custom allocator fails

Accept G, GB and GiB suffixes for options

Retry CI

Remove LICENSE file in build/ dir

Update programs/zstd.1.md

Co-authored-by: Nick Terrell <nickrterrell@gmail.com>

update man

avoid potential RC on ctx->threadLimit, code review;
closes gh-4547; replaces gh-4558

Merge pull request #4598 from facebook/dependabot/github_actions/cygwin/cygwin-install-action-6.1

Bump cygwin/cygwin-install-action from 6.0 to 6.1

Merge pull request #4597 from facebook/dependabot/github_actions/actions/upload-artifact-7.0.0

Bump actions/upload-artifact from 6.0.0 to 7.0.0

Bump cygwin/cygwin-install-action from 6.0 to 6.1

Bumps [cygwin/cygwin-install-action](https://github.com/cygwin/cygwin-install-action) from 6.0 to 6.1.
- [Release notes](https://github.com/cygwin/cygwin-install-action/releases)
- [Commits](https://github.com/cygwin/cygwin-install-action/compare/f2009323764960f80959895c7bc3bb30210afe4d...711d29f3da23c9f4a1798e369a6f01198c13b11a)

---
updated-dependencies:
- dependency-name: cygwin/cygwin-install-action
  dependency-version: '6.1'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump actions/upload-artifact from 6.0.0 to 7.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6.0.0 to 7.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

correct mmap error check

Update mmap error validation to check for MAP_FAILED instead of NULL.
POSIX specifies that mmap returns MAP_FAILED (-1) on failure.

bitstream: fix `BIT_readBits` and `BIT_reloadDStream` prototypes

Align the declarations of BIT_readBits() and BIT_reloadDStream() in
bitstream.h with their FORCE_INLINE_TEMPLATE definitions.

The previous MEM_STATIC declarations caused an attribute mismatch
between the header and the definitions, which can lead to incorrect
compiler assumptions under certain toolchains and optimization levels.

Signed-off-by: Alexander Moch <mail@alexmoch.com>

Make explicit ptrdiff_t to int casts in divsufsort.c to avoid compiler warnings.

fix: adjust LDM params in estimate functions to prevent SIGFPE (issue #4590)

Fix formatting of lz4 option in zstdcli.c

Fix formatting of lz4 option in README

Merge pull request #4575 from Cyan4973/depend_monthly

extend dependabot period to monthly

extend dependabot period to monthly

Merge pull request #4574 from facebook/dependabot/github_actions/actions/checkout-6.0.2

Bump actions/checkout from 6.0.1 to 6.0.2

Merge pull request #4573 from facebook/dependabot/github_actions/actions/setup-java-5.2.0

Bump actions/setup-java from 5.1.0 to 5.2.0

Bump actions/checkout from 6.0.1 to 6.0.2

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.1 to 6.0.2.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](https://github.com/actions/checkout/compare/v6.0.1...v6.0.2)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump actions/setup-java from 5.1.0 to 5.2.0

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 5.1.0 to 5.2.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](https://github.com/actions/setup-java/compare/f2beeb24e141e01a676f977032f5a29d81c9e27e...be666c2fcd27ec809703dec50e508c2fdc7f6654)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-version: 5.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4554 from facebook/no_legacy

Remove legacy support by default

Merge pull request #4555 from facebook/fix4553

Fix #4553

test: fix versionsTest build for old zstd versions

Summary:
Some old zstd versions (notably v0.6.x) have a bug in fileio.c where header includes check for `ZSTD_LEGACY_SUPPORT==1` but code usage checks for `ZSTD_LEGACY_SUPPORT>=1`. Using value 5 causes compilation failure because headers aren't included but the code tries to use legacy functions.

Changing to `ZSTD_LEGACY_SUPPORT=1` for old version builds fixes the compilation while still enabling legacy format support.

Test Plan:
Run `make versionsTest` or `python3 tests/test-zstd-versions.py` to verify all old versions compile and cross-version decompression works correctly.

Fix #4553

This is a bug in the streaming implementation of the v0.5 decoder.
The bug has always been there.
It requires an uncommon block configuration, which wasn't tested at the time.

v0.5 is deprecated now,
latest version to produce such format is v0.5.1 from February 2016.
It was superceded in April 2016.
So it's both short lived and very old.

Another PR will remove support of this format,
but it will still be possible to explicitely request this support on demand,
so better fix the issue.

test: enable legacy support in version compatibility test

Summary:
The version compatibility test needs to decode legacy frames (v0.5.x - v0.7.x) to verify cross-version interoperability. Since legacy support is now disabled by default (v1.6.0), head must be built with ZSTD_LEGACY_SUPPORT=5 for this test.

Test Plan:
Run `python3 tests/test-zstd-versions.py` to verify cross-version compatibility testing works correctly.

test: update libzstd_builds.sh for disabled legacy default

Summary:
Updates the library build tests to reflect that legacy format support is now disabled by default. Also adds a new test case to verify that legacy support can still be explicitly enabled via ZSTD_LEGACY_SUPPORT=5.

Test Plan:
Run `bash tests/libzstd_builds.sh` on a Linux environment.

build: set ZSTD_LEGACY_SUPPORT=0 in remaining build systems

Summary:
Completes the transition to disabled legacy support by default across all build systems. This follows up on the previous Makefile and CMake changes to ensure consistent default behavior regardless of the build system used.

Updated build configurations: Meson, tests/Makefile, Visual Studio 2008/2010 projects, and BUCK.

Test Plan:
Verified changes compile correctly via `make lib-release`. Build system configurations have been updated consistently across all platforms.

doc: legacy support is now disabled by default

update dev version number to v1.6.0

to reflect the relatively big scope change by removing support of legacy formats.

[cmake] disable legacy support by default

can still be explicitly enabled

Makefile: remove support of legacy formats by default

can still be changed manually by setting `ZSTD_LEGACY_SUPPORT` to a different value

Merge pull request #4545 from facebook/cirrusci_bsd_fix

[ci] update freebsd image

changed to freebsd 15

since the image 16 does not seem to work

Merge pull request #4551 from facebook/dependabot/github_actions/actions/upload-artifact-6.0.0

Bump actions/upload-artifact from 5.0.0 to 6.0.0

Merge pull request #4552 from facebook/dependabot/github_actions/actions/cache-5

Bump actions/cache from 4 to 5

Merge pull request #4550 from facebook/dependabot/github_actions/msys2/setup-msys2-2.30.0

Bump msys2/setup-msys2 from 2.29.0 to 2.30.0

Bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump actions/upload-artifact from 5.0.0 to 6.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump msys2/setup-msys2 from 2.29.0 to 2.30.0

Bumps [msys2/setup-msys2](https://github.com/msys2/setup-msys2) from 2.29.0 to 2.30.0.
- [Release notes](https://github.com/msys2/setup-msys2/releases)
- [Changelog](https://github.com/msys2/setup-msys2/blob/main/CHANGELOG.md)
- [Commits](https://github.com/msys2/setup-msys2/compare/fb197b72ce45fb24f17bf3f807a388985654d1f2...4f806de0a5a7294ffabaff804b38a9b435a73bda)

---
updated-dependencies:
- dependency-name: msys2/setup-msys2
  dependency-version: 2.30.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4544 from facebook/dependabot/github_actions/actions/setup-java-5.1.0

Bump actions/setup-java from 5.0.0 to 5.1.0

[ci] update freebsd image

Bump actions/setup-java from 5.0.0 to 5.1.0

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 5.0.0 to 5.1.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](https://github.com/actions/setup-java/compare/dded0888837ed1f317902acf8a20df0ad188d165...f2beeb24e141e01a676f977032f5a29d81c9e27e)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-version: 5.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4543 from facebook/dependabot/github_actions/actions/checkout-6.0.1

Bump actions/checkout from 6.0.0 to 6.0.1

Bump actions/checkout from 6.0.0 to 6.0.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.0 to 6.0.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](https://github.com/actions/checkout/compare/v6...v6.0.1)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4525 from Polaris-911/new-feature

Add RISC-V 64-bit architecture detection

Merge pull request #4531 from lukaskollmer/lukas/fix-swift-build

modulemap: remove `config_macros`

Merge pull request #4494 from LecrisUT/maint-cmake

Split lib target types in their own export groups

modulemap: remove `config_macros`

Merge pull request #4529 from facebook/dependabot/github_actions/actions/checkout-6.0.0

Bump actions/checkout from 5.0.0 to 6.0.0

Bump actions/checkout from 5.0.0 to 6.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](https://github.com/actions/checkout/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4522 from facebook/dependabot/github_actions/github/codeql-action-4.31.2

Bump github/codeql-action from 3.30.1 to 4.31.2

Add RISC-V 64-bit architecture detection

Bump github/codeql-action from 3.30.1 to 4.31.2

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 3.30.1 to 4.31.2.
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/github/codeql-action/compare/f1f6e5f6af878fb37288ce1c627459e94dbf7d01...0499de31b99561a6d14a36a5f662c2a54f91beee)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-version: 4.31.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4519 from facebook/dependabot/github_actions/actions/upload-artifact-5

Bump actions/upload-artifact from 4 to 5

Bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #4491 from facebook/cmake_root

[cmake] propose a root wrapper

Merge pull request #4517 from Cyan4973/asyncio_revisit

Remove asyncio from the compression path

syncio interface only enabled when compression is enabled

changed name to syncIO for clarity

minor: use init/destroy pair naming convention

removed asyncio completely for compression path

this does not provide speed benefits,
since most of the leverage happens internally within the library,
and can even become detrimental in certain scenario, due to complex and wasteful memory management.
At a minimum, it makes the logic simpler, easier to debug, at essentially the same performance.

disable asyncio during compression

it's not helpful for performance, and can in some times be detrimental.
the synchronous mode is also much easier to follow and debug.

Merge pull request #4515 from cclauss/patch-1

Fix undefined names in automated_benchmarking.py

Fix undefined names in automated_benchmarking.py

Fix variable name typos in automated_benchmarking.py

% `ruff check`
```
Error: tests/automated_benchmarking.py:237:21: F821 Undefined name `baseline_label`
Error: tests/automated_benchmarking.py:250:21: F821 Undefined name `baseline_label`
Error: tests/automated_benchmarking.py:318:55: F821 Undefined name `frequenc`
Error: Process completed with exit code 1.
```
% [`ruff rule F821`](https://docs.astral.sh/ruff/rules/undefined-name)

Merge pull request #4516 from Cyan4973/mingw_calloc_order

minor: fix mingw warnings: calloc argument order

minor: fix mingw warnings: calloc argument order

Merge pull request #4509 from arpadpanyik-arm/revert_branch_opt

AArch64: Revert previous branch optimization

AArch64: Remove 32-bit code from ZSTD_decodeSequence

Remove the 32-bit code paths from the AArch64 only sections of
ZSTD_decodeSequence.

AArch64: Revert previous branch optimization

Revert a branch optimization that was based on an incorrect
assumption in the AArch64 part of ZSTD_decodeSequence. In extreme
cases the existing implementation could lead to data corruption.

Insert an UNLIKELY hint to guide the compilers toward generating more
efficient machine code.

Merge pull request #4504 from rzikm/asm-conditional

Make ASM language conditional at CMake configure time

Enable ASM language during CMake configure time only when needed

Merge pull request #4502 from zijianli1234/dev

- Modify the GCC version used for CI testing of the RISCV architecture

- Modify the GCC version used for CI testing of the RISCV architecture
- Fix a bug in the ZSTD_row_getRVVMask function
- Improve some performance for ZSTD_copy16()

[cmake] add minimal build test

for CMakeLists.txt at root

[cmake] root wrapper

allow the existence of a `CMakeLists.txt` file at root,
for easier integration with other projects expecting this file at root.

Existing integration point, within `build/cmake/`, still works as expected.