| Syntax: | Default: |
| /qlibansi | /qnolibansi |
| /qnolibansi |
Use /qlibansi to instruct the compiler that all functions with the name of an ANSI C library function are the system functions, not user-defined functions.
With /qlibansi, the optimizer may generate code that performs better because it already knows the behavior of a system function (for example, whether or not it causes side effects).
By default, the compiler does not assume that functions with the same name as ANSI C library functions are system functions.