Feature request: LDF scan for a new entry "mcu"

[Jason2866]

• [x] Feature Request. Start by telling us what problem you’re trying to solve. Often a solution already exists! Don’t send pull requests to implement new features without first getting our support. Sometimes we leave features out on purpose to keep the project small.

---

Configuration

Operating system: All

PlatformIO Version (platformio --version): latest development

Description of problem

Add a option to the LDF to scan for mcu in librarary.properties or in library.json mcu is already a entry in Arduino ESP32 boards.txt Esp32 has different mcu cores now (ESP32-C3 soon too) which needs different libraries. At the moment there is no possibility to differentiate this or did i missed something? Maybe as new command strict+ ?

[ivankravets]

It should be implemented in dev-platform. See https://github.com/espressif/arduino-esp32/blob/master/tools/platformio-build.py#L177

[valeros]

HI @Jason2866 ! Could you please provide an example of any library that needs this feature?

[Jason2866]

Hi @valeros The ESPP3232-C3 is available. All libs which are compatible to core esp32 are used for the C3 too, as there is no possibility to handle the mcu variant with LDF. We have some optimized libs which are mcu dependent ( xtensa vs. riscv) it would be nice not to litter the code with many #ifdefs to take care of this. More elegant would be to have lib variants for every architecture

Examples: https://github.com/arendst/Tasmota/tree/development/lib/default/Ext-printf https://github.com/arendst/Tasmota/tree/development/lib/libesp32/Berry https://github.com/arendst/Tasmota/tree/development/lib/lib_ssl/bearssl-esp8266