Can't disable error squiggles?

[effemmeffe]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

My code is full or error squiggles, obviously since the intellisense for C is not working anymore and so all the functions are not recognized.
I read about clangd and its configuration, but I am using an old version of STM32CubeIde and there is no setting for the configuration of clangd.
So basically I moved from free VSCode to paid Cursor and my coding experience become worse.
Is there some way to disable squiggles for good?

Steps to Reproduce

Write some C code with functions in different files

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.50 (user setup)
VSCode Version: 1.105.1
Commit: 56f0a83df8e9eb48585fcc4858a9440db4cc7770
Date: 2025-12-06T23:39:52.834Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.22621

For AI issues: which model did you use?

Auto

Does this stop you from using Cursor

No - Cursor works, but with this issue

[deanrie]

Hey, thanks for the report.

Cursor only uses the Anysphere C++ extension plus Clangd.

Issue: Clangd needs a compile_commands.json to work correctly. For STM32CubeIDE you have to generate it separately. That’s a known pain point for embedded projects.

Two options:

1. Configure Clangd (recommended if you want IntelliSense):

• Generate compile_commands.json with Bear (GitHub - rizsotto/Bear: Bear is a tool that generates a compilation database for clang tooling.) or compiledb (GitHub - nickdiego/compiledb: Tool for generating Clang's JSON Compilation Database files for make-based build systems.)
• Guide: Getting started

2. Disable squiggles entirely (quick fix):

Create a .clangd file in the project root:

Diagnostics:
  Suppress: '*''

Let me know which option you prefer.

[Bard_Williams]

Hi there,
After adding Diagnostics: Suppress: '*' to my .clangd configuration file, the top of my source file still displays the error: “Too many errors emitted, stopping now clang(fatal_too_many_errors)”. Additionally, the source file appears highlighted in red in the sidebar. I’ve tried everything to disable this but haven’t succeeded—could you please help resolve this issue?Thanks for your support.