Error “ld: symbol not found for architecture x86_64”

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This error indicates that your code, usually from the C family language, has imported a header but has not yet been linked to it’s implementation.

For example, there is a header SimpleMath.h

// SimpleMath.h
int divide_by_zero(int i);

Then we import it intomain.c

// main.c
#include "SimpleMath.h"
int main() {
    int result = divide_by_zero(100);
    printf("Result is %d", result);
}

When we compile it without implementation of SimpleMath.h then we we’ll get ld: symbol not ... (bla-bla-bla)

The solution is to compile it with SimpleMath.c

clang main.c SimpleMath.c -o program

Or to link it with system implementation if there any.

clang main.c -LSimpleMath -o program

Fixed? Not yet. You’ll want to read more about C language then.

Oh yes, our SimpleMath.c implementation is

// SimpleMath.c
#include "SimpleMath.h"
int divide_by_zero(int i) {
   exit(1);
}

Happy fixing error!