My clangd setup

CompileFlags:                     # Tweak the parse settings
  Add: [-xc++, -Wall, -std=c++17]             # treat all files as C++, enable more warnings
  Remove: -W*                     # strip all other warning-related flags
  Compiler: clang++               # Change argv[0] of compile flags to `clang++`
Diagnostics:
  UnusedIncludes: None

Bashrc setup:
comp() {
    filename="${1%.cpp}"  # 获取输入文件名，去掉扩展名
    clang++ -O2 -Wall -Wfatal-error "$1" -o "$filename"  # 编译并输出为输入文件名 + .out
}