Name clash of `const char *TAG` with Arduino core macro `TAG`.

[everslick]

Easy to fix by renaming TAG to e.g. tag in:

nimble/esp_port/esp-hci/src/esp_nimble_hci.c nimble/nimble/host/store/config/src/ble_store_nvs.c

[h2zero]

I've never heard of this issue before, this must be something to do with the new arduino core?

[everslick]

Not really, this is a feature that was implemented with PR https://github.com/espressif/arduino-esp32/pull/4845 in 2021.

It allows redirecting logs from IDF and Arduino to your own logging mechanism by calling esp_log_set_vprintf() and defining USE_ESP_IDF_LOG. Additionally it allows setting the TAG define to give logs from IDF a unique tag name which then clashes with the TAG const in NimNLE-Arduino.

I also first thought it was CORE 3.0.0 that broke my build and reported this in Arduino CORE https://github.com/espressif/arduino-esp32/issues/9704.

[everslick]

Please note that renaming TAG to something else does fix the build when a user defines USE_ESP_IDF_LOG, so at least the firmware compiles. But to make the LOG redirection work also for Nimble-Arduino, I had to make a small change in NimBLELog.h:

#if defined(CONFIG_NIMBLE_CPP_IDF) || defined(CONFIG_NIMBLE_CPP_LOG_IDF) // using esp-idf
#  include "esp_log.h"
#  ifndef CONFIG_NIMBLE_CPP_LOG_LEVEL
#    define CONFIG_NIMBLE_CPP_LOG_LEVEL 0
#  endif

#  define NIMBLE_CPP_LOG_PRINT(level, tag, format, ...) do { \
    if (CONFIG_NIMBLE_CPP_LOG_LEVEL >= level) \
      ESP_LOG_LEVEL(level, tag, format, ##__VA_ARGS__); \
    } while(0)

I introduced the new CONFIG_NIMBLE_CPP_LOG_IDF define and I had to replace ESP_LOG_LEVEL_LOCAL with ESP_LOG_LEVEL. Now I could add:

#define CONFIG_NIMBLE_CPP_LOG_IDF
#define CONFIG_NIMBLE_CPP_LOG_LEVEL CORE_DEBUG_LEVEL

to nimconfig.h and all is good. ;-)

I'm not sure if this is the cleanest or correct way to do it, but now NimBLE logs also get logged correctly via my own logging mechanism.

[h2zero]

Okay, that makes sense now, thanks!. I will make that change shortly.

[everslick]

Thank you very much! Also for maintaining this NimBLE fork! (which should be the canonical BLE lib in Ardunio, IMHO!)