ckwastra

Initialization in C++: A corner case

Recently, I've been trying to find out the difference between copy-initialization (e.g. in return statements) and direct-initialization (e.g. in static_cast expressions). Besides the explicit keyword, the code posted by Johannes really caught my attention because recent versions of GCC and Clang exhibit different behaviors for the mentioned code. Upon further investigation, it may be surprising that these behaviors are somewhat intentional. In the following, I will try to explain this corner case of initialization in C++. This post may be a bit arcane. Anyway, have fun reading!

Introduction

Given the following code:

// -std=c++23

binji

• How to Cross Compile LLVM: https://llvm.org/docs/HowToCrossCompileLLVM.html
• Building LLVM with CMake: https://llvm.org/docs/CMake.html
• Hints from wasi-sdk Makefile: https://github.com/CraneStation/wasi-sdk/blob/master/Makefile
• Try compiling natively (needed for llvm-tblgen and clang-tblgen)
  • cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;WebAssembly" -DLLVM_ENABLE_PROJECTS="lld;clang" ../llvm
• Try building LLVM with WASI:
• cmake -G Ninja -DCMAKE_AR=”/usr/local/google/home/binji/dev/llvm-project/build/bin/llvm-ar” -DCMAKE_RANLIB=”/usr/local/google/home/binji/dev/llvm-project/build/bin/llvm-ranlib” -DCMAKE_C_COMPILER="/usr/local/google/home/binji/dev/wasi-sdk-5.0/opt/wasi-sdk/bin/clang" -DCMAKE_CXX_COMPILER="/usr/local/google/home/binji/dev/wasi-sdk-5.0/opt/wasi-sdk/bin/clang++" -DCMAKE_CROSSCOMPILING=True -DCMAKE_INSTALL_PREFIX=/usr/local/google/home/binji/dev/wasi-clang -DLLVM_TABLEGEN=/usr/local/google/home/binji/dev/llvm-project/build/bin/llvm-tblgen -DCLANG_TABLEGEN=/

WesThorburn

Linux: Compile C++ to WebAssembly and JavaScript using Emscripten and CMake

Download and Install Emscripten

• My preferred installation location is /home/user
• Get the latest sdk: git clone https://github.com/emscripten-core/emsdk.git
• Enter the cloned directory: cd emsdk
• Checkout main: git checkout main
• Install the lastest sdk tools: ./emsdk install latest
• Activate the latest sdk tools: ./emsdk activate latest
• Activate path variables: source ./emsdk_env.sh

mohanpedala

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

doughgle

commit acc0182c3d3869802bc20c8bf4e04c3464936bcc
Author: Douglas Hellinger <[email protected]>
Date:   Sun Nov 19 22:48:46 2017 +0800

    Fix tracerPid=0 in /proc

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 6f6fc16..bcf470d 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c

guozhou

#include <iostream>
#include <cuda_runtime.h>
#include <device_launch_parameters.h>

// GTS450 sm_21
#define NUM_SM 4 // no. of streaming multiprocessors
#define NUM_WARP_PER_SM 48 // maximum no. of resident warps per SM
#define NUM_BLOCK_PER_SM 8 // maximum no. of resident blocks per SM
#define NUM_BLOCK NUM_SM * NUM_BLOCK_PER_SM
#define NUM_WARP_PER_BLOCK NUM_WARP_PER_SM / NUM_BLOCK_PER_SM

m14t

#/bin/bash
#-- Script to automate https://help.github.com/articles/why-is-git-always-asking-for-my-password

REPO_URL=`git remote -v | grep -m1 '^origin' | sed -Ene's#.*(https://[^[:space:]]*).*#\1#p'`
if [ -z "$REPO_URL" ]; then
  echo "-- ERROR:  Could not identify Repo url."
  echo "   It is possible this repo is already using SSH instead of HTTPS."
  exit
fi