OSDT Weekly 第300期 · OSDT Weekly

《OSDT Weekly》迎来了第300期！从2019年7月10日第001期一路走来，小编团队自己都没有想到可以坚持这么久。感谢所有贡献过内容的小编和读者！

近期活动

GSoC 学生申请火爆进行中！
RISC-V 黑客马拉松下周开始，武汉、北京、长沙均有线下场地。
4月11日，openEuler Developer Day 在杭州举行。

编译社区的八卦信息

GCC

GCC15 临近尾声，大量的 bugfix patch 被提交到gcc15分支上。

[PATCH v3 00/19] FMV refactor and ACLE compliance. https://gcc.gnu.org/pipermail/gcc-patches/2025-March/679488.html
[PATCH] RISC-V: Add pattern for vector-scalar multiply-add/sub [PR119100] https://gcc.gnu.org/pipermail/gcc-patches/2025-March/679513.html
[COMMITTED 01/35] gccrs: Fix function name to printf https://gcc.gnu.org/pipermail/gcc-patches/2025-March/679788.html
[PATCH] gimple-low: Diagnose assume attr expressions defining labels which are used as unary && operands outside of those [PR119537] https://gcc.gnu.org/pipermail/gcc-patches/2025-April/679872.html

Performance of bench-malloc-thread improves by 9.2% for 1 thread and 6.9% for 32 threads on Neoverse V2

[PATCH 1/6] malloc: Move mmap code out of __libc_free hotpath https://sourceware.org/pipermail/libc-alpha/2025-March/165614.html
[PATCH v3 1/2] x86: Skip XSAVE state size reset if ISA level requires XSAVE https://sourceware.org/pipermail/libc-alpha/2025-March/165584.html

LLVM/Clang/LLDB/LLD

本节内容来自 LLVM Weekly 第 587 期， Alex Bradbury 大哥持续稳定输出。

新的项目： JP Lehr announced that MetaCG development has now moved out into the open. MetaCG offers an annotated whole program call-graph tool for Clang/LLVM.
安全防护相关： Peter Collingbourne published a set of pointer authentication code or memory safety related RFCs: the structure protection family of UAF mitigation techniques, deactivation symbols, and emulated PAC.
有朋友看过么？不太清楚是做什么的： Vasileios Porpodas provided an update on the Sandbox Vectorizer project, noting that IR coverage is at 90% and the vectorizer is stable enough to compile and run the llvm-test-suite and clang as a workload.
这么夸张： Mike Urbach raised the issue of overflow of orderIndex in MLIR for very large (100s of millions of ops!) basic blocks.
开源软件供应链攻击日益猖獗，防御机制也在逐步完善： Tom Stellard has a proposed incident response guide aimed for LLVM project admins looking to handle a security incident.
是国内的小伙伴！ Yingwei Zheng shared news of clang-i18n, a plugin for a dynamically linked clang/LLVM to translate diagnostic messages to other languages.
国内的伙伴： ChuanqiXu updated their proposal for extensions to export macros/preprocessor states for C++20 modules.
MLIR人气是真的旺： Alex Zinenko proposed allowing arbitrary vector element types in MLIR, following on from the previous RFC on allowing pointers as vector element types.
祝贺： A new late branch optimisation pass was added for RISC-V, cleaning up conditional branches that can be statically evaluated with an unconditional branch. d8e44a9.

QEMU (RISC-V)

[PATCH v2 00/12] Fix RVV encoding corner cases https://lists.nongnu.org/archive/html/qemu-devel/2025-03/msg06908.html
[PATCH v2 1/2] target/riscv: Restrict mideleg/medeleg/medelegh access to https://lists.nongnu.org/archive/html/qemu-devel/2025-04/msg00054.html

RISC-V in China

复旦团队全球首发二维半导体32位RISC-V架构芯片“无极” links
中科院软件所团队推动 Cloud Hypervisor 官方支持 RISC-V links

RT-Thread 社区

POSIX（Portable Operating System Interface，可移植操作系统接口）是由 IEEE 制定的跨平台操作系统接口标准，旨在统一 UNIX-like 系统的应用程序接口（API），确保软件在不同系统间的可移植性。RT-Thread 建议成立 POSIX SIG, 对 POSIX 进行持续改善。详情见：https://github.com/RT-Thread/rt-thread/issues/10156。
RT-Thread 社区发起讨论，收集比较通用和官方的针对 RISC-V 的 toolchain, 方便后续 RISC-V 平台整理和使用比较统一的版本。详情见：https://github.com/RT-Thread/rt-thread/issues/10161。
3 月 29 日，开源操作系统年度技术会议（OS2ATC 2025）在京召开。睿赛德携 “程翧整车基础软件 OS” 亮相操作系统年会。详情见：https://mp.weixin.qq.com/s/NTsRWI6MghC3bKOiL6HOVw。

AI Compilers

LLAMA 4 发布 & 开源了！不过现在的模型都很大了，动辄需要 60 万人民币以上的设备，一般人已经玩不起了。7B 这样的模型还可以玩一玩。

本周工具链岗位

往期社招及实习生招聘长期有效。

本周推荐阅读

本周推荐：《无边界组织》

作者：[美] 罗恩·阿什肯纳斯 / [美] 戴维·尤里奇 / [美] 托德·吉克 / [美] 史蒂夫·克尔

译者：康至军