# OSDT Weekly 2020-04-29 第043期
### 近期线下活动
稳住，就要赢了。5月22日已经是一个顶层钦定的大型活动时间点。很快就可以见面了。
## 编译社区的八卦信息
### GCC
- O3下到底打开了哪些优化？
GCC optimizations with O3
https://gcc.gnu.org/pipermail/gcc/2020-April/232161.html
- x86控制流保护的的讨论
Broken check rejecting -fcf-protection and -mindirect-branch=thunk-extern
https://gcc.gnu.org/pipermail/gcc/2020-April/232245.html
- ThunderX3调度支持merge了
[PATCH v5] aarch64: Add TX3 machine model
https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544699.html
- Michael Meissner关于PowerPC ABI支持的一系列patch
[PATCH] PowerPC -mcpu=future Patch 1 of 7, add target supports for
-mpcrel and -mprefixed
https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544655.html
- Jonathan Wakely关于c++头文件的一系列x清理
[committed 0/8] libstdc++: Add/update/fix feature test macros
https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544370.html
- [RFC] Clarify -ffinite-math-only documentation
https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544622.html
### Binutils/GDB
- [PATCH] AArch64: add GAS support for UDF instruction
https://sourceware.org/pipermail/binutils/2020-April/110866.html
- [PATCH 0/7] RISC-V: Support version controling for ISA standard
extensions and CSR
https://sourceware.org/pipermail/binutils/2020-April/110814.html
- [PATCH 00/10] Fix two name-related bugs in DWARF reader
https://sourceware.org/pipermail/gdb-patches/2020-April/167894.html
### GLIBC
- GLIBC动态链接器重构patch set
[PATCH glibc 1/9] Introduce <elf_machine_sym_no_match.h>
https://sourceware.org/pipermail/libc-alpha/2020-April/113040.html
- [PATCH 00/10] y2038: Convert clock_adjtime related syscalls to
support 64 bit time
https://sourceware.org/pipermail/libc-alpha/2020-April/113155.html
- [PATCHv3 0/6] powerpc64le: enable IEEE128 ldouble redirects
https://sourceware.org/pipermail/libc-alpha/2020-April/113088.html
### LLVM/Clang/LLDB/LLD
本节内容来自 [LLVM Weekly 第329期](http://llvmweekly.org/issue/329)，
[Alex Bradbury](https://www.linkedin.com/in/alex-bradbury/) 大哥持续稳定输出。
* ORC JIT Weekly #13 [is
out](http://lists.llvm.org/pipermail/llvm-dev/2020-April/141228.html).
Discord user @Juicebox has written a project to enable PDB debugging
on Windows with ORC and MCJIT.
* (Clang) More SVE builtins were added.
[823e2a6](https://reviews.llvm.org/rG823e2a670a9),
[db79974](https://reviews.llvm.org/rGdb7997472bb),
[c84e130](https://reviews.llvm.org/rGc84e1305c4f).
* MLIR's liveness analysis now supports nested regions.
[c79227c](https://reviews.llvm.org/rGc79227cabb3).
### RISC-V in China
芯来科技创始人、中国RISC-V第一网红老师胡振波老师继续开设线上课程：
RISC-V处理器设计系列课程（6）蜂鸟E203异常与中断
https://mp.weixin.qq.com/s/9NJ5_CO4xGAW878zid6IDw
感兴趣的小伙伴不要错过。平时请胡老师讲课都是很贵的，而现在公开出来了教学资料，千万不要错过学习的机会。（努力！奋斗！）
### TVM 社区
看起来很有可能TVM会接纳MLIR作为（又）一个 Frontend？
https://discuss.tvm.ai/t/rfc-mlir-frontend/6473
恭喜 liangfu 成为新晋 committer 🎉
Please join us to welcome @liangfu as a committer. He has helped maintain
much of the Chisel codebase for VTA and notably has brought support to Intel
FPGAs. More recently he contributed by adding a MISRA-C compliant lightweight
runtime for micro-controllers. He also built early support for sparse
operations in CSR form.
[eclipse-dev] Committer election is now complete for Julian Honnen on Eclipse
Java development tools (JDT)
