インテル® Fortran コンパイラー XE 13.1 ユーザー・リファレンス・ガイド
Statement: Overrides or confirms the compiler options in effect for a program unit.
OPTIONS option[option...]
The OPTIONS statement must be the first statement in a program unit, preceding the PROGRAM, SUBROUTINE, FUNCTION, MODULE, and BLOCK DATA statements.
OPTIONS statement options override compiler options, but only until the end of the program unit for which they are defined. If you want to override compiler options in another program unit, you must specify the OPTIONS statement before that program unit.
For details on compiler options, see your Compiler Options reference