Linking C executable zephyr/zephyr_pre0.elf FAILED: undefined reference to 'isUsingMagn'

The compilation process encountered a linking error with the following message: /n/n'FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map D:/0Document/HeadTracker/HeadTracker_ESP32/headtracker/build/zephyr/zephyr_pre0.map'/n/nThe specific error is:/n/n'c:/users/nineday/zephyr-sdk-0.16.0/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0/../../../../riscv64-zephyr-elf/bin/ld.bfd.exe: app/libapp.a(imu.c.obj): in function imu_Thread':/nD:/0Document/HeadTracker/HeadTracker_ESP32/headtracker/src/imu.c:141: undefined reference to isUsingMagn'/nc:/users/nineday/zephyr-sdk-0.16.0/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0/../../../../riscv64-zephyr-elf/bin/ld.bfd.exe: app/libapp.a(imu.c.obj): in function ms2_to_g':/nD:/0Document/HeadTracker/HeadTracker_ESP32/headtracker/src/imu.h:34: undefined reference to isUsingMagn'/nc:/users/nineday/zephyr-sdk-0.16.0/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0/../../../../riscv64-zephyr-elf/bin/ld.bfd.exe: app/libapp.a(imu.c.obj): in function calculate_Thread':/nD:/0Document/HeadTracker/HeadTracker_ESP32/headtracker/src/imu.c:283: undefined reference to isUsingMagn'/ncollect2.exe: error: ld returned 1 exit status/n.../nFATAL ERROR: command exited with status 1: 'C://Program Files//CMake//bin//cmake.EXE' --build 'D://0Document//HeadTracker//HeadTracker_ESP32//headtracker//build'/n/nThis error message indicates that the isUsingMagn function is being used in the imu.c.obj file, but it is not defined. This means the linker cannot find a definition for this function, resulting in the linking error./n/nTroubleshooting steps:/n/n1. Check the definition of isUsingMagn: Verify that the isUsingMagn function is correctly defined in your code. Ensure the function name, return type, and arguments are consistent with how it is used in imu.c.obj. /n2. Ensure the function is in the correct scope: Make sure the isUsingMagn function is accessible from where it is being called in imu.c.obj. This means it should be declared in a header file that is included in imu.c or defined in a source file that is linked with imu.c. /n3. Verify the linking process: Double-check the build system configuration to ensure that the source file containing the isUsingMagn function is correctly included in the linking process. Make sure the linker flags are correctly configured to include the necessary libraries and objects. /n/nIf you have reviewed and corrected these points and the issue persists, provide more context about the following:/n/n* The code snippet where the isUsingMagn function is defined and where it is used in imu.c. /n* The build system configuration, including linker flags and the structure of the project. /n/nThis additional information will help in providing more specific guidance for resolving the linking error.