Task

 verify the version/revision of your currently running (compiler/interpreter/byte-compiler/runtime environment/whatever your language uses) and exit if it is too old.
 check whether the variable "bloop" exists and whether the math-function "abs()" is available and if yes compute abs(bloop).


Extra credit

 Report the number of integer variables in global scope, and their sum.


requires("0.8.2")           -- crashes on 0.8.1 and earlier 
requires(WINDOWS)           -- crashes on Linux 
requires(64)                -- crashes on 32-bit
