How do you tell eglot and clangd about the compilation database (compile_commands.json)?

Question

I'm trying to set up Emacs for C++ development, with IDE-like features. I installed eglot and have got it working, somewhat. Flymake is drawing red error markers and reporting errors on #include ... lines, but everything compiles fine.

I wonder if these false errors are because I never told it about my compile_commands.json file. I use CMake, and at the root of my project I have a build/binary dir named build-debug. When I run cmake I generate the file, so it's there in build-debug/compile_commands.json.

Is there a way to tell eglot/clangd about this file?

score 2 · Accepted Answer · answered Oct 04 '22 at 08:22

2

The solution is simple: just add a symlink ln -s build-debug/compile_commands.json in your project root.

answered Oct 04 '22 at 08:22

Ian

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That appears to have worked. Thanks. How did you know that? Did I miss it in the docs somewhere? – Rob N Oct 04 '22 at 23:57
See this: https://clang.llvm.org/docs/HowToSetupToolingForLLVM.html – Ian Oct 05 '22 at 08:19

How do you tell eglot and clangd about the compilation database (compile_commands.json)?

1 Answers1