Add support for Arduino Core 3.0.0

[everslick]

It's this time of year when major changes in the Arduino Core break makeEspArduino. But maybe this needs only a small fix. I believe the build breaks because the IDF headers are now in tools/esp32-arduino-libs/esp32/ instead of tools/sdk/esp32/. But maybe the linking stage needs a fix too. I didn't come that far. ;-)

[everslick]

~changing SDK_ROOT to SDK_ROOT = $(ESP_ROOT)/tools/esp32-arduino-libs gets me further:~

SDK_ROOT is not used anywhere, so my initial build issues have been unrelated (i.e. old object files in the build dir). Anyway...

Arduino-ESP32-3.0.0/cores/esp32/chip-debug-report.cpp:212:67: error: expected primary-expression before ')' token
  212 |   chip_report_printf("  Compile Host OS   : %s\n", ARDUINO_HOST_OS);

Arduino-ESP32-3.0.0/cores/esp32/chip-debug-report.cpp:224:64: error: expected primary-expression before ')' token
  224 |   chip_report_printf("  Arduino FQBN      : %s\n", ARDUINO_FQBN);

I guess it's missing defines for ARDUINO_HOST_OS and ARDUINO_FQBN.

[everslick]

Adding:

DEFINES += -DARDUINO_HOST_OS=\"$(OS)\" -DARDUINO_FQBN=\"generic\"

helps, but should probably done in makeEspArduino.mk.

[plerup]

Thanks for reporting. Fix coming tonight.

[plerup]

Fixed in latest commit

[everslick]

Thanks!