I use NeoVim with coc-clangd. I have a project in C and I use vendor library SPL for STM8S chips. SPL library is in parent directory out of my project.

This is my compile_flags.txt:


If I input gd - go to definition - all works right. But if I input gi go to implementation, I get the message [coc.nvim] implementation not found .

My question is: Where is the place for configuration of sources files location (with implementations of functions)?

  • For the go to implementation to work with clangd you need a compile_commands.json file. Maybe this answer could help you? Commented Feb 17 at 12:09
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    Does this answer your question? How to configure Neovim clangd to find my files? Commented Feb 17 at 12:10
  • Unfortunately no. But this answer led me to another exploration and additional attempts. I will have to rephrase my question. Commented Feb 18 at 8:07
  • In this moment I need to launch clangd (inside NVim) so that I can see its stdout. I haven't been able to persuade Nvim to redirect clangd stdout to a file. I need to view log to debug my issue. Commented Feb 18 at 8:44

1 Answer 1


In order to be able to find the implementation clangd need to find a compile_commands.json that contains the compilation instruction of the modules (.cpp, .c file) that contains the implementation.

I believe the compile_commands.json must be in the current working directory.

In order to have Vim set the current working directory correctly I'm using the vim-rooter plugin and I put a .gitignore in the root of my project hierarchy to guide vim-rooter.

  • "We first check for a compilation database in the directory containing the source file, and then walk up into parent directories until we find one." Out-of-source builds as with CMake can cause problems, though. They are easily fixed with a symlink.
    – Friedrich
    Commented Feb 18 at 12:50
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    Furthermore, creating a .gitignore file (that's not at all constrained to a repo's root dir) so a plugin can correctly "guess" that dir seems like a very convoluted way to do :cd <project_root>.
    – Friedrich
    Commented Feb 18 at 13:14
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    Yes, that's correct. When I replace compile_flags.txt with compile_commands.json it works. But it is necessary use 'go to definition' no 'go to implementation'. Commented Feb 19 at 20:31
  • Thanks for the feedback :-) Commented Feb 19 at 20:34
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    I watch different behavior for similar files. It's mystery for me. I have two files in same directory. This two files is described same rules in compile_commands.json. Firs is in compilation database, second is not. If I use gd over function1 Nvim go to body of function1 in first file. If I use gd over function2 Nvim go to header of function2 in header file. Now I'm opening manually second source file with function2 and suddenly the editor behaves differently: I use gd over function2 Nvim go to body of function2 in second file. Commented Feb 19 at 20:45

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