Go to: Microchip XC Compilers

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"configurations": [

| Problem | Solution | |---------|----------| | fatal error: xc.h: No such file or directory | You are using a generic gcc instead of the XC compiler. Ensure you’ve selected the XC toolchain in your IDE or build script. | | Undefined references like TRISB | You may need to specify the target device explicitly (e.g., -mcpu=atmega328p for AVR). | | Using xc.h with plain avr-gcc | It won’t work. Stick to avr/io.h if not using Microchip’s XC compiler. |