# OSDT Weekly 2020-07-08 第053期
OSDT Weekly 一周岁啦 🎉
全年无休更新了53期，完成了一年的准时[0]更新。见证了魔幻的2020。这才7月。以后半年，希望大家都健康平安、不裁员。
[0] 实际上有一期延期了一天。
### 近期线下活动
7月5日的 LLVM + RISC-V 线上讨论会视频 已经公开，参见
http://www.hellogcc.org/?p=34386
下次活动计划7月底或者8月初。目前开放报名，话题是开源开发工具范围内都可以，例如GCC、LLVM、QEMU、Valgrind、DynamoRIO。
可以直接联系OSDT的负责人吴伟报名进行分享。
## 编译社区的八卦信息
### GCC
- IBM/PowerPC可能是目前最活跃的GCC后端
[PATCH] Add power10 BRD/BRW/BRH support.
https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549276.html
[PATCH 1/2] PowerPC: Rename FP min/max/cmove functions.
https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549303.html
[PATCH] rs6000: Refine RTL unroll adjust hook
https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549581.html
(历史原因，PowerPC后端叫做rs6000 https://en.wikipedia.org/wiki/IBM_RISC_System/6000)
- GCC usage script
https://gcc.gnu.org/pipermail/gcc/2020-July/233058.html
- DWARF Operator的讨论
DW_OP_implict_value usage and motivation
https://gcc.gnu.org/pipermail/gcc/2020-July/233043.html
- Bell贡献ThunderX2 GCC后端调优
[PATCH] aarch64: Change costs for TX2 to expose more vectorization
opportunities
https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549459.html
- [PATCH] middle-end: Improve RTL expansion in expand_mul_overflow,
https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549473.html
### Binutils/GDB
- [PATCH 0/5] x86: XOP disassembler corrections and improvements
https://sourceware.org/pipermail/binutils/2020-July/112177.html
- [PATCH] RISC-V: Support GNU indirect functions.
https://sourceware.org/pipermail/binutils/2020-July/112186.html
- [PATCH 00/11] x86: disassembler size reduction and fixes
https://sourceware.org/pipermail/binutils/2020-July/112096.html
- [PATCH 0/4] bfd: Add support for Cygwin x86_64 core dumps
https://sourceware.org/pipermail/binutils/2020-July/112105.html
- [PATCH 0/7] GDB busy loop when interrupting non-stop program (PR 26199)
https://sourceware.org/pipermail/gdb-patches/2020-July/170222.html
- [PATCH V3 0/3] eBPF support
https://sourceware.org/pipermail/gdb-patches/2020-July/170148.html
### GLIBC
- [PATCH v6 00/14] aarch64: branch protection support
https://sourceware.org/pipermail/libc-alpha/2020-July/115629.html
- [PATCH v7 00/13] glibc port to ARC processors
https://sourceware.org/pipermail/libc-alpha/2020-July/115721.html
- [PATCH 0/2] x86: Add thresholds for "rep movsb/stosb" to tunables
https://sourceware.org/pipermail/libc-alpha/2020-July/115759.html
- [PATCH 0/4] sunrpc symbol cleanups
https://sourceware.org/pipermail/libc-alpha/2020-July/115888.html
- [RFC 00/10] y2038: nptl: futex: Provide support for futex_time64
https://sourceware.org/pipermail/libc-alpha/2020-July/115901.html
### LLVM/Clang/LLDB/LLD
本节内容来自 [LLVM Weekly 第340期](http://llvmweekly.org/issue/340)，
[Alex Bradbury](https://www.linkedin.com/in/alex-bradbury/) 大哥持续稳定输出。
有报名的小伙伴么？
* The 2020 Virtual LLVM Developers' Meeting call for presentations [has an
upcoming deadline of July 15th](
http://lists.llvm.org/pipermail/llvm-dev/2020-July/143056.html). The
conference will take place on October 6th-8th.
LLVM也要要开始做孵化器了。Apache 化？
* Chris Lattner wrote up [a proposal for LLVM incubator projects](
http://lists.llvm.org/pipermail/llvm-dev/2020-June/142911.html), based on
the previous mailing list discussion.
* New MVT types were added as a pre-requisite for RISC-V vector extension
support. [a7b0f39](https://reviews.llvm.org/rGa7b0f391852).
* X86 CPU feature initialisation was moved to a lookup table implementation.
[3537939](https://reviews.llvm.org/rG3537939cda8).
* The AArch64 backend regains performance on a SPEC2006 benchmark by
implementing getCFInstrCost and treating branches as free for throughput.
[1ccc499](https://reviews.llvm.org/rG1ccc49924ae).
### RISC-V in China
投票7月31日结束，会员单位们不要忘记投票撒。
[RISC-V国际基金会BoD提名今天截止，大陆共2人提名，7月1日开始进入投票阶段](
https://mp.weixin.qq.com/s/qsawMD3zOKorQ4DlY2mvAA)
RISC-V Global Forum 2020 投稿7月10日截稿，各位想要参与的朋友注意时间。会议信息和投稿地址：
https://events.linuxfoundation.org/riscv-global-forum/
这个会议是线上进行的，9月3日，而且特地有一个适合上海时区参会观看的会议区间，可以说是相当贴心了。
注意同样7月10日截稿的还有 RISC-V Summit，注意这俩不是一个活动，Summit
是12月份在北美的线下活动，强烈不建议中国大陆的小伙伴冒险前往。
### TVM 社区
风平浪静。一切按部就班。
### Mozilla
风平浪 —— 才不是呢！
停更了整整一年多的 Servo 博客突然诈尸，更新了 This Week In Servo 131 （不愧是2020！）
https://blog.servo.org/2020/07/06/twis-131/
新加入了一名贡献者，公布了几十个新的功能点改进。2020的路线图发布在 servo GitHub 的 repo/wiki 里。
Servo 是用 Rust 重写的 Firefox 页面渲染引擎。
Servo is a modern, high-performance browser engine designed for bothapplication and embedded use.
Sponsored by Mozilla and written in the new systems programming languageRust, the Servo project aims to achieve better parallelism, security,
If they refuse to share what they have done with the kernel it’sreasonable to expect that they might have put in some form of backdoors for
