OSDT Weekly 第104期

近期活动

目前的线下活动逐渐恢复，不过我们将会在后续都坚持线上线下混合会议的形式了。

编译社区的八卦信息

GCC

• GNU Tools @ Linux Plumbers Conference 2021 https://gcc.gnu.org/pipermail/gcc/2021-June/236555.html

  GCC Rust Monthly Call - 2nd July 2021 https://gcc.gnu.org/pipermail/gcc/2021-June/236585.html

• daily report on extending static analyzer project [GSoC] https://gcc.gnu.org/pipermail/gcc/2021-June/236557.html

• [PATCH 0/7] PHI-OPT move abs_replacement to match.pd https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573558.html

• [PATCH 0/7] ifcvt: Convert multiple https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573732.html

• [COMMITTED V10 0/7] Support for the CTF and BTF debug formats https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573851.html

• [PATCH 0/2] RISC-V: Add ldr/str instruction for T-HEAD. https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573887.html

• [PATCH 0/3] amdgcn: Integer multiplication improvements https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573911.html

• [PATCH 0/4] rs6000: Add SSE4.1 "test" and "blend" intrinsics https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573930.html

Binutils/GDB

• [PATCH v3 0/2] elf: Implement indirect external access marker https://sourceware.org/pipermail/binutils/2021-June/117153.html

• GDB: [PATCH 0/5] Frame debug output improvements https://sourceware.org/pipermail/gdb-patches/2021-June/180447.html

• Propose GDB 11 branching next weekend (Jul 03-04, 2021) https://sourceware.org/pipermail/gdb-patches/2021-June/180375.html

• GDB: [PATCH v3 00/12] Extensions for PTWRITE https://sourceware.org/pipermail/gdb-patches/2021-June/180035.html

GLIBC

• x86 CPU features detection for applications (and AMX) https://sourceware.org/pipermail/libc-alpha/2021-June/128201.html

• [PATCH v1 0/6] nptl: Introduce and use FUTEX_LOCK_PI2 https://sourceware.org/pipermail/libc-alpha/2021-June/128073.html

• [PATCH 0/8] Remove malloc hooks https://sourceware.org/pipermail/libc-alpha/2021-June/128043.html

• aarch64 lacks HP_TIMING support in glibc https://sourceware.org/pipermail/libc-alpha/2021-June/127884.html

• [PATCH] AArch64: Improve strnlen performance https://sourceware.org/pipermail/libc-alpha/2021-June/127936.html

LLVM/Clang/LLDB/LLD

本节内容来自 LLVM Weekly 第391期， Alex Bradbury 大哥持续稳定输出。

• Leonard Chan started an RFC discussion on building LLVM tools into a single binary (busybox-style), and followed up with a WIP prototype.

• Tom Stellard proposed only changing the libclang.so SONAME when the ABI changes.

• Andrew Kaylor started a thread about floating point variance in the test suite, noting that it's still the case that some tests fail if the floating point calculations don't exactly match the reference results.

• Luke Drummond helpfully summarised the various responses on the thread about appropriate use of the 'NFC' tag.

• Arthur Eubanks is advertising for help in completing the opaque pointers implementation plan.

• 讨论还在继续。There's been yet more discussion on moving the LLVM mailing lists to Discourse. Aaron Ballman raised a concern about fracturing the community.

• Anirudh Prasad proposed a new mechanism for tieing a particular inline asm operand to a specific register, that has also been proposed in GCC. Responses so far have been positive.

• New documentation was added on the use of opt and the new pass manager. e15673d.

• A Bazel build configuration was added to the repo, following approval of the proposal to do so. 4aeb2e6.

• MLIR's async-parallel-for pass was updated to implement recursive async work splitting for scf.parallel operations. 86ad0af.

RISC-V in China

为期一周的 RISC-V 中国峰会顺利结落幕。同时，峰会的组委会启动了 「落幕，未结束：RISC-V 中国峰会线上参会者签到手袋送达及奖品派送计划启动」 计划，为因为疫情或其他原因无法到达现场的注册参会者，免费寄出签到手袋、T恤。

峰会有关的视频和幻灯片大概在下周能够陆续放出。需要剪辑和跟演讲者确认的量比较大，请耐心等待。

RT-Thread 社区

• 新书《物联网——嵌入式开发实战》上架，以STM32单片机和RT-Thread操作系统为核心，从物联网的框架、相关技术点、网络通信协议、嵌入式开发等方面，系统地阐述了物联网开发必备的知识。相信读者看完对物联网有清晰的了解。

• 教你动手移植RT-Thread到国产MCU

• 【AI简报20210625期】自动驾驶运动预测挑战赛、20美元的宜家台灯算力有多强？

• 智能汽车竞赛|英飞凌TC264、TC364、TC377开源库适配RT-Thread操作系统啦 本次英飞凌RTT开源库是由RTThread官方与逐飞科技一起合作完成的，RT-Thread工程师负责修改RT-Thread操作系统的底层文件，以适配英飞凌TriCore内核的单片机和AURIX Development Studio IDE软件。逐飞科技将修改好的RT-Thread操作系统的底层文件移植到现有的英飞凌开源库中，做好智能车应用的相关外设适配，提供了10个内核示例便于快速上手

• 青岛场・基于RT-Thread嵌入式操作系统的教学研讨交流会7月19日-7月20日，RT-Thread 将联合青岛科技大学，开展基于RT-Thread国产物联网操作系统的教学交流与研讨，协助高校进行国产替代的教学改革与交流，促进高校国产人才培养改革

• RT-Thread Master已更新支持 lwip 2.0.3，https://github.com/RT-Thread/rt-thread/pull/4824

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：《费曼的彩虹》

这本书不是费曼自己写的。这本书是在费曼人生的最后几年，指点过的一个年轻物理学家写的。如果赶时间的话，那么看费曼的自传（别闹了，费曼先生！）或者费曼的物理学讲义或许能够更有效率的获取到知识。《费曼的彩虹》更合适在旅途中阅读，从大师的身边人所记录的点滴，更为真实的认识到费曼，也同时认识到真实的作者，并羡慕他。