Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 3/31/2023
Public

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Document Table of Contents

inline-level, Ob

Specifies the level of inline function expansion.

Syntax

Linux:

-inline-level=n

macOS:

-inline-level=n

Windows:

/Obn

Arguments

n

Is the inline function expansion level. Possible values are 0, 1, and 2.

Default

-inline-level=2 or /Ob2

This is the default if option O2 is specified or is in effect by default. On Windows* systems, this is also the default if option O3 is specified.

-inline-level=0 or /Ob0

This is the default if option -O0 (Linux* and macOS) or /Od (Windows*) is specified.

Description

This option specifies the level of inline function expansion. Inlining procedures can greatly improve the runtime performance of certain programs.

Option

Description

-inline-level=0 or /Ob0

Disables inlining of user-defined functions. Note that statement functions are always inlined.

-inline-level=1 or /Ob1

Enables inlining when an inline keyword or an inline directive is specified.

-inline-level=2 or /Ob2

Enables inlining of any function at the compiler's discretion.

IDE Equivalent

Visual Studio: Optimization > Inline Function Expansion

Alternate Options

None

See Also