The simplest of makefile

The contents of hello.c are as follows:
#include <stdio.h>
int main ()
{
printf ("Hello world!\n");
return 0;
}
The contents of makefile are as follows:
hello.exe:hello.o
Gcc-o Hello.exe hello.o
Hello.o:hello.c
Gcc-c hello.c
Clean:
RM hello.o Hello.exe
Under Windows command Line (Cmd.exe), go to the directory where makefile is located and execute the make command.

The hello.exe will be generated.

Attention:
1, makefile file doesn't have a extension.
2, there must be a tab before the second, fourth, sixth line

The simplest of makefile