error in build

[RunDebugCode]

Processing airm2m_core_esp32c3 (platform: espressif32; board: airm2m_core_esp32c3; framework: arduino)

Verbose mode can be enabled via -v, --verbose option CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/airm2m_core_esp32c3.html PLATFORM: Espressif 32 (6.4.0) > AirM2M CORE ESP32C3 HARDWARE: ESP32C3 160MHz, 320KB RAM, 4MB Flash DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-builtin, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa) PACKAGES:

• framework-arduinoespressif32 @ 3.20011.230801 (2.0.11)
• tool-esptoolpy @ 1.40501.0 (4.5.1)
• toolchain-riscv32-esp @ 8.4.0+2021r2-patch5 LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf LDF Modes: Finder ~ chain, Compatibility ~ soft Found 35 compatible libraries Scanning dependencies... No dependencies Building in release mode Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduinoVariant\variant.cpp.o Building .pio\build\airm2m_core_esp32c3\bootloader.bin Generating partitions .pio\build\airm2m_core_esp32c3\partitions.bin Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\Esp.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\FirmwareMSC.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\FunctionalInterrupt.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\HWCDC.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\HardwareSerial.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\IPAddress.cpp.o esptool.py v4.5.1 Creating esp32c3 image... Merged 1 ELF section Successfully created esp32c3 image. Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\IPv6Address.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\MD5Builder.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\Print.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\Stream.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\StreamString.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\Tone.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\USB.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\USBCDC.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\USBMSC.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\WMath.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\WString.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\base64.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\cbuf.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-adc.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-bt.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-cpu.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-dac.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-gpio.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-i2c-slave.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-i2c.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-ledc.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-matrix.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-misc.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-psram.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-rgb-led.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-rmt.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-sigmadelta.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-spi.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-time.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-timer.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-tinyusb.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-touch.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\esp32-hal-uart.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\firmware_msc_fat.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\libb64\cdecode.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\libb64\cencode.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\main.cpp.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\stdlib_noniso.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\wiring_pulse.c.o Compiling .pio\build\airm2m_core_esp32c3\FrameworkArduino\wiring_shift.c.o Archiving .pio\build\airm2m_core_esp32c3\libFrameworkArduino.a Indexing .pio\build\airm2m_core_esp32c3\libFrameworkArduino.a Linking .pio\build\airm2m_core_esp32c3\firmware.elf c:/users/26900/.platformio/packages/toolchain-riscv32-esp/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: .pio\build\airm2m_core_esp32c3\libFrameworkArduino.a(main.cpp.o): in function loopTask(void*)': C:/Users/26900/.platformio/packages/framework-arduinoespressif32/cores/esp32/main.cpp:47: undefined reference tosetup()' c:/users/26900/.platformio/packages/toolchain-riscv32-esp/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: C:/Users/26900/.platformio/packages/framework-arduinoespressif32/cores/esp32/main.cpp:47: undefined reference to `loop()' collect2.exe: error: ld returned 1 exit status *** [.pio\build\airm2m_core_esp32c3\firmware.elf] Error 1