title: common.h: No such file or directory (Ubuntu gcc)
body: <p>When I was trying to compile a C program like this:</p>
  
  <pre><code>1 #include &lt;stdio.h&gt;
  2 #include &lt;stdlib.h&gt;
  3 #include &lt;sys/time.h&gt;
  4 #include &lt;assert.h&gt;
  5 #include "common.h"
  6
  7 int
  8 main(int argc, char *argv[])
  9 {
  10 if (argc != 2) {
  11 fprintf(stderr, "usage: cpu &lt;string&gt;\n");
  12 exit(1);
  13 }
  14 char *str = argv[1];
  15 while (1) {
  16 Spin(1);
  17 printf("%s\n", str);
  18 }
  19 return 0;
  20 }
  </code></pre>
  
  <p>and I received a error </p>
  
  <pre><code>CPU.c:5:19: fatal error: common.h: No such file or directory
  </code></pre>
  
  <p>I have update my gcc compiler, so I cannot figure out why there is a miss of  "Common.h"</p>