-flteval

Controls floating point evaluation.

-fprecision

Initializes the rounding-precision mode bits in the Floating-point Control Word

-fstore

Causes the compiler to convert the value of a floating-point expression or function to the type on the left-hand side of an assignment

-nofstore

Does not convert the value of a floating-point expression or function to the type on the left-hand side of an assignment

-xmodel

Modifies the form of 64-bit objects for the Solaris x86 platforms

-xpentium

Optimizes for the Pentium processor.