Compilation error related to WinMain

//////////// LinkedList.h ////////////
#pragma once

typedef struct LINKEDLIST {
    Node* head;
    Node* cur;
    Node* before;
    int numOfData;
    int(*comp)(LData d1, LData d2);
}LinkedList;

typedef LinkedList List;
void ListInit(List* plist);


//////////// //////////// LinkedList.c ////////////
#include <stdio.h>
#include "LinkedList.h"

void ListInit(List* plist) {
    plist->head = (Node*)malloc(sizeof(Node));
    plist->head->next = NULL;
    plist->comp = NULL;
    plist->numOfData = 0;
}


//////////// //////////// main.c /////////////
#include <stdio.h>
#include "LinkedList.h"

int main() {
    List list;
    ListInit(&list);
    return 0;
}

c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../libmingw32.a(main.o):(.text.startup+0xa0): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status