optimization enables compiler optimizations. corresponds to {$o}.
stack frames forces compiler to generate stack frames on all procedures and functions. corresponds to {$w}.
pentium-safe fdiv delphi only. generates delphi code that detects a faulty floating-point division instruction. corresponds to {$u}.
record field alignment aligns elements in structures to the specified number of bytes (1, 2, 4, or 8). choose the alignment type from the drop-down list. corresponds to {$a}. note: in older versions of delphi, this option could be checked on or off. choosing 1 is the equivalent of off and 8 is the equivalent of on.
runtime errors effect
range checking checks that array and string subscripts are within bounds. corresponds to {$r}.
i/o checking checks for i/o errors after every i/o call. corresponds to {$i}.
overflow checking checks overflow for integer operations. corresponds to {$q}.
syntax options effect
strict var-strings sets up string parameter error checking. corresponds to {$v}. (if the open parameters option is selected, this option is not applicable.)
complete boolean eval evaluates every piece of an expression in boolean terms, regardless of whether the result of an operand evaluates as false. corresponds to {$b}.
extended syntax enables you to define a function call as a procedure and to ignore the function result. also enables pchar support. corresponds to {$x}.
typed @ operator controls the type of pointer returned by the @ operator. corresponds to {$t}.
open parameters enables open string parameters in procedure and function declarations. corresponds to {$p}. open parameters are generally safer, and more efficient.
huge strings enables new garbage collected strings. the string keyword corresponds to the ansistring type with this option enabled. otherwise the string keyword corresponds to the shortstring type. corresponds to {$h}.
assignable typed constants enable this for backward compatibility with delphi 1.0 on windows. when enabled, the compiler allows assignments to typed constants. corresponds to {$j}.
debugging effect
