build.extra_flags replaces the esp32 core's platform-level flags, which include CONFIG_IDF_TARGET_ESP32S3 — required by Arduino_GFX for RGB panel support. compiler.cpp.extra_flags appends safely.
build.extra_flags replaces the esp32 core's platform-level flags, which include CONFIG_IDF_TARGET_ESP32S3 — required by Arduino_GFX for RGB panel support. compiler.cpp.extra_flags appends safely.