forcing make hello

hello.c

#include <stdio.h>
int main(int argc, char *args[])
{
    printf("Hello, world!\n");
    return 0;
}

Rakefile

require 'rake/clean'
CLOBBER.include('hello')
SRC_DISTDIR = './helloworld'
directory SRC_DISTDIR
CC = 'gcc'
str = <<EOS
#{CC} -o hello hello.c
./hello
EOS

desc 'compile C langueage'
task 'default' => 'hello'

task 'hello' => 'hello.c' do
  sh str
end

desc 'Create hello world in your directory'
task 'make_hello_package' => [SRC_DISTDIR, 'hello.c'] do
  cp ['hello.c'], SRC_DISTDIR
  cd SRC_DISTDIR
  sh str
end