◆ErrorOracle
unknown

undefined reference to 'function_name'

Error message

undefined reference to 'function_name'

What broke

'function_name' was declared but not defined, leading to a linker error. This typically occurs when the function is either missing or not linked correctly in the build process.

Why it broke

Linker errors like this happen when the function is declared in a header file or source file but the corresponding implementation is not found during the linking stage. This can occur if the source file containing the function definition is not included in the build.

How to fix

To resolve this, ensure that the function 'function_name' is defined in one of your source files. Additionally, check that all relevant source files are included in your build configuration.

Code fix

// Ensure this function is defined somewhere in your code
void function_name() {
    // function implementation
}

Explained by ErrorOracle

Prevention tip

Additionally, check that all relevant source files are included in your build configuration.

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