Getting clang: error: linker command failed with exit code 1 (use -v to see invocation) when using code runner in VSCode on Ubuntu System

Question

The program is structured as follows:

main.c:

#include <stdio.h>
#include "../include/test.h"

int main(){
    moo();
    return 0;
}

test.c:

#include <stdio.h>
#include "../include/test.h"

void moo(){
    printf("moo\n");
}

test.h:

#ifndef MOO_HEADER
#define  MOO_HEADER

void moo();

#endif

The directory structure is as follows: 1)proj2 1.1)include 1.1.1)test.h 1.2)src 1.2.1)main.c 1.2.2)test.c

The command that is executed on running using code runner is:

cd "/home/saumya/Desktop/cProj/proj2/src/" && clang-12 main.c -o main && "/home/saumya/Desktop/cProj/proj2/src/"main

The error message looks like:

/usr/bin/ld: /tmp/main-6d60a6.o: in function `main':
main.c:(.text+0x12): undefined reference to `moo'
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Not sure what I am doing wrong here. Would be grateful for any inputs.

The code works completely fine if instead of including the test.h header file I directly include the test.c file but if I am not wrong that is not the best method to use #include while coding.