Empty compilation database for XC8

[SamuelYvon]

Describe the bug Using bear -- make on a Microchip PIC project (8 bit MCU) creates an empty compilation database.

To Reproduce

An (almost) empty XC8 project will not work.

Expected behavior

A non-empty compilation database.

Environment:

• OS name: Linux
• OS version: Pop!_OS 21.04
• OS architecture: x86_64
• Bear version: 3.0.8
• Bear install method: apt

Additional context

• What build tools this project is using? [e.g. GNU make] make / xc8-cc
• What architecture you are trying to compile for? Microchip PIC

Here is my config file. I could not find a full example of the config file, so I am not sure if this works or is valid syntax. I opened issue #402 because I also cannot see what bear sees my config as.

> cat ~/.config/bear.conf
strategy:
  append_to_existing: false
  include_headers: false
  include_linking: false
  compilers: 
      languages:
        c++:
          - g++
          - clang++
        c:
          - gcc
          - clang
          - xc8-cc
          - xc8
          - "/opt/microchip/xc8/v2.32/bin/xc8-cc"
        mpi:
          - mpiCC
          - mpicc
          - mpicxx
          - mpic++
        wrapper:
          - distcc
          - ccache

Before you send...

• Have you read the README.md file or man bear? yes
• Have you looked what other open issues Bear has? There is a similar (the same) issue where the solution is to add --use-cc=xc8-cc but this option does not seem to work anymore (https://github.com/rizsotto/Bear/issues/286)
• Are you sure that the build works without Bear? yes

[rizsotto]

Hey @SamuelYvon , thanks for the report. The first thing I've noticed that the config file is written in YAML, but the current Bear version is only able to read JSON file. (The config file is documented in the citnames command's man page.)

[SamuelYvon]

Thanks! It generated a compile_commands.json file properly. While it does not work with ccls, I don't think it's an issue with bear. As a note, I spotted in man bear that it says citnames contains the config template, so this is on me.