Kozmotronik Q&A - Recent questions and answers in Computer science

Answered: How to enable GCOV coverage in ESP-IDF

Thu, 24 Jul 2025 12:12:09 +0000

This problem arises because the ESP-IDF can't find the configuration of the app_trace component. Although this wasn't mentioned in the relevant docs or the gcov example, the component should be declared in the test_app/main/CMakeLists.txt file as a REQUIRED component.

Here is the correct declaration so that you can see the app_trace configs in the SDK config menu:

idf_component_register(
    SRCS ${srcs}
    INCLUDE_DIRS "."
    REQUIRES unity relay_chn app_trace
    WHOLE_ARCHIVE
)

GCOV Enablement Checklist

Make sure the and gcovr is installed by python -m pip install gcovr
Add app_trace as REQUIRED in the relevant CMakeLists.txt file
Add the --coverage compiler option for the relevant files to their specific cmake files. See Compiler Option for Gcov
Configure the App Trace component correctly to be able to collect gcov data. See Project Configuration for Gcov

Answered: How to exit QEMU automatically when target restarts in ESP-IDF

Thu, 24 Jul 2025 10:30:23 +0000

QEMU has an option called -no-reboot (see also here), that causes the QEMU exit when the emulated target is rebooted. But since QEMU is called via idf.py, this option should be passed to qemu using the --qemu-extra-args flag as stated here.

So the final command to invoke in terminal would be like the following;

idf.py qemu --qemu-extra-args "-no-reboot"

Answered: How to add relative file links in Github or Gitea editor

Tue, 22 Jul 2025 22:03:36 +0000

Both Github and Gitea supports relative linking in their markdown editor. The relative link format is just like specifying a path in a directory:
[Some file](path/to/somefile)

Or for referring to a specific snapshot of a file:
[Some file](/blob/ref-id/path/to/somefile)

Where the ref-id can be a commit id or a branch name.

Reference:

https://stackoverflow.com/questions/7653483/github-relative-link-in-markdown-file