Building from source

[jefflongo]

Is there any documentation on how to build from source, to say, change a board Kconfig option? The best I've found is trying to run the build script in https://github.com/espressif/esp32-arduino-lib-builder but I've not had much success when trying to reference a particular tag for arduino-esp32 and esp-idf...

[me-no-dev]

what exactly do you want to build?

[jefflongo]

Specifically, I want to build the arduino-esp32 library (so building the static library/header bundle) to enable CONFIG_BT_CTRL_MODEM_SLEEP as a workaround for #5909, such that I can compile an existing application of mine with arduino-cli with this option enabled.

I'd like to be able to do this while targeting a specific tag from this repo with the associated esp-idf version (i.e. 2.0.12 with esp-idf 4.4.5). My understanding thus far is that esp32-arduino-lib-builder is the way you are intended to do this, adding the option in the config file in lib-builder, building the library then overwriting the files in your local installation. I have not been able to build a version of the library using lib builder that has successfully compiled and linked with my existing application yet.

[jefflongo]

For further clarification, I'd like to understand what the recommended procedure is to build for a specific arduino-esp32 git tag using lib-builder.

EDIT: I am finally able to successfully build both the library and my application with the Kconfig change. My procedure is as follows:

• checkout the release/v4.4 branch in the lib-builder repo, since my target arduino-esp32 tag targets idf 4.4.x
• add CONFIG_BT_CTRL_MODEM_SLEEP=y to configs/defconfig.esp32c3 in lib-builder
• run lib-builder as follows: ./build.sh -t esp32c3 -I release/v4.4 -i v4.4.6
  • sometimes it's needed to cd into esp-idf and reset everything to clean master branch as the build script sometimes leaves this repo in a pretty broken state..
• install targeted arduino-esp32 tag with arduino-cli: arduino-cli core install esp32:[email protected]
• copy ONLY the out/toolsfrom lib-builder to overwrite $HOME/.arduino15/packages/esp32/hardware/esp32/major.minor.revision/tools
  • copying the platform.txt causes errors because the paths to the compiling tools and esptool are incorrect in the generated platform.txt

not the most intuitive process but it works...