title: -fno-omit-frame-pointer without optimization
body: <p>I was wondering what -fno-omit-frame-pointer will do without optimization?</p>
  
  <blockquote>
    <p>CXXFLAGS = -Wall -ggdb3 -DDEBUG -fno-omit-frame-pointer</p>
  </blockquote>
  
  <p>Isn't it that fomit-frame-pointer auto turned on at all levels of -O (except -O0)? I assume in my example it is -O0 by default.</p>
  
  <p>Thanks and regards!</p>