title: How to know/limit static stack size in C program with GCC/Clang compiler?
body: <p>I'm writing an embedded program that uses a static limited stack area of a known size (in other words, I have X bytes for the stack, and there's no overlaying OS that can allocate more stack on demand for me). I want to avoid errors during runtime, and catch them in build time instead - to have some indication if I mistakenly declared too much variables in some function block that won't fit in the stack during the runtime.</p>
  <p>Given that I don't use recursive calls in my program, can I somehow know during compilation time how much space on stack all my local variables will take on the deepest function call path? Or at least know how much space my variables will take in a single block (function) if the compiler is not smart enough to analyze it on all the nested calls?</p>