title: How do I disable tailcall optimizations in gcc
body: <p>I wonder if anyone knows the flag for gcc to disable tailcall optimizations.  Basically in a tailcall optimization, gcc will replace a stack frame when the return value from a called function is passed through (via return) or nothing else happens in the function.</p>
  <p>That is, in</p>
  <pre><code> void main() {
       foo();
   }
  
   void foo() {
       bar();
   }
   
   void bar() {
       /* at this point in code, the foo() stack frame no longer exists! */    
   }
  </code></pre>
  <p>When foo calls bar, gcc emits code that replaces the stack frame for foo, rather than adding a new stack frame.</p>
  <p>My company has a stack unwinder that can print out a stack trace from any point in code.  tailcall optimization makes stack frames disappear, which can confuse the stack trace somewhat.</p>
  <p>I am compiling for x86-64 using GCC 4.3.</p>