Warning esp32-hal-uart.c function returning non-void

I’m new to platform-io. In my first attempt to program an ESP32 I tried a simple blinky program. I’m getting a warning, but why? Would like to build without any glitches.

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platform = espressif32
board = lolin32
framework = arduino

Hi @chriskuku, this warning originates from the Arduino framework itself, so you can ignore it.