GCC compiler flag "-DEVAL"

Question

On some programming judges I found that their default GCC call is with flags:

-DEVAL -static -O2 -o 

What does -DEVAL mean?

Answer 1

Just FYI: this is how to print all the available macro definitions:

gcc -E -dD -x c /dev/null -o -

Compare it with

gcc -E -DEVAL -dD -x c /dev/null -o -