B.2.98 -xlibmil

Inlines some library routines for faster execution. This option selects the appropriate assembly language inline templates for the floating-point option and platform for your system.

-xlibmil inlines a function regardless of any specification of the function as part of the -xinline flag.

However, these substitutions can cause the setting of errno to become unreliable. If your program depends on the value of errno, avoid this option. See also 2.10 The Value of errno.