gcc -Wunreachable-code option

[Vijayaraghavan Murali]

I'm trying to make gcc generate warnings for detecting unreachable code
in a program using -Wunreachable-code. But it simply doesn't seem to
work, even for a simple program such as:
int main() { return 1; return 0; }

I don't find -Wunreachable-code in man gcc, but it doesn't complain if I
pass the option to it.

I must be clearly missing something trivial here and would appreciate
any help. I'm using gcc 4.5.2 and installed gcc-opt, if it matters.

Thank you!

--------
Vijayaraghavan Murali
http://www.comp.nus.edu.sg/~mvijayar
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