Can't clangd in cmake (already enabled export compile command) work out of the box?

[SOLVED] also discussed in [here](https://github.com/clangd/clangd/discussions/1113) In my emacs, I use `lsp-emacs` + `clangd`, there are so many clangd error outputs but it can compile success, there's also happened in other projects. And when I use clion with clangd these errors are just gone and the syntax check outputs are the same as compiler compilation output. These are my operations when I get starting with a project: `cmake -B build -DCMAKE_EXPORT_COMPILE_COMMAND=YES -DCMAKE_BUILD_TYPE=Debug && ln -s build/compile_command.json .`. Are there any operations and configurations I missed? here's my [collected info](https://gist.github.com/K1ngst0m/ecc9d11860cc066e7d5b6a79d4dd4844) following the [troubleshooting guide](https://emacs-lsp.github.io/lsp-mode/page/troubleshooting/)

Same thing for me with VScode having much less errors(compiles fine). I heard, that many language servers get overwhelmed with hacky,custom builds(which it is) so I stopped trying.

The other day I was trying to configure lsp-mode, clangd and cmake. And this worked for me. Run this commands in the root of the project. - cmake -S . -B build - cmake --build build - cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON build You do not need to symbolic link the `compile_caommand.json` file. `lsp-mode` will look for it in the `build/` directory by default. Sometimes you have to restart `lsp-mode` with the command `lsp-workspace-restart`.

Sometimes I need to generate build directory such as build_platform/{debug,release}/xxx and that will cause `compile_command.json` not found without linking and I haven't understood how it works. Thanks for your tips. But I tried your command and I thought that works the same as mine (same result with many errors in clangd which the compiler is working just fine).

Check the [clangd system headers](https://clangd.llvm.org/guides/system-headers) guide on how to handle some error cases. The guide is quite detailed on those cases. This is the most common issue I used to have.

ok, thanks for your help

`CMAKE_EXPORT_COMPILE_COMMANDS`. The last `s` is missing in your command.

This helped me: https://github.com/nickdiego/compiledb