C and C++

clangd

C/C++ support for diagnostics, navigation, symbols, formatting, and compile-database-aware intelligence.

Delivery

system or bundled clangd depending on platform

Activation

.c, .cc, .cpp, .h, .hpp, and compile_commands.json

Capabilities

Uses compile_commands.json for include paths, macros, standards, and build flags.

Provides completions, hover, diagnostics, definitions, references, symbols, and formatting.

Works best when the build system exports an accurate compile database.

Install clangd or use a build that bundles it.

Generate compile_commands.json from CMake, Ninja, Bear, or your build system.

Open the folder where clangd can find that compile database.

False missing includes usually mean compile_commands.json is absent or stale.

Wrong standard diagnostics come from missing build flags.

Header-only navigation improves when the including translation units are known.