-qlibansi
Category
Pragma equivalent
Purpose
Assumes that all functions with the name of an ANSI C library function are in fact the system functions.
When libansi is in effect, the optimizer can generate better code because it will know about the behavior of a given function, such as whether or not it has any side effects.
Defaults
-qnolibansi
Predefined macros
__LIBANSI__ is defined to 1 when libansi is in effect; otherwise, it is not defined.