Hi ESP_Angus, thanks very much for your help, I will look into rtags, I have not used that. In any case I can always just fix up any errors when compiling.

My trouble is getting flycheck-mode (in emacs) to properly work for ESP32 development. For example, if I have #include "esp_log.h" at the top of my file, flycheck-mode reports esp_log.h: No such file or directory . The real problem is that flycheck-mode (at least for c) stops at the first error, and...