These error occurs when after compilation we link the different object files with main’s object using Ctrl+F9 key(RUN). These are errors generated when the executable of the program cannot be generated. This may be due to wrong function prototyping, incorrect header files. One of the most common linker error is writing Main() instead of main().
// C program to illustrate
// linker error
#include<stdio.h>
void Main() // Here Main() should be main()
{
int a = 10;
printf("%d", a);
}
Error:
(.text+0x20): undefined reference to `main
