What are some common linker errors in programming?

What are some common linker errors I might encounter in C++?

Common linker errors in C++ include 'undefined reference to', 'multiple definitions', and 'cannot find -l<library>'. Would you like examples?

Yes, can you give me an example of 'undefined reference to'?

Sure! This error occurs when you declare a function but forget to define it. For instance, if you declare void myFunction(); but don't provide a definition, you'll get this error during linking.

What about 'multiple definitions'?

The 'multiple definitions' error happens when the same function or variable is defined in multiple translation units. For example, if you define a function in a header file included in multiple source files, you'll encounter this error.

How can I fix these linker errors?

To fix these errors, ensure that all declared functions are defined, use extern for global variables in headers, and avoid defining functions in headers unless they're inline.