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

f66

Tells the compiler to apply FORTRAN 66 semantics.

Syntax

Linux:

-f66

macOS:

-f66

Windows:

/f66

Arguments

None

Default

OFF

The compiler applies Fortran 2018 semantics.

Description

This option tells the compiler to apply FORTRAN 66 semantics when interpreting language features. This causes the following to occur:

  • DO loops are always executed at least once.

  • FORTRAN 66 EXTERNAL statement syntax and semantics are allowed.

  • If the OPEN statement STATUS specifier is omitted, the default changes to STATUS='NEW' instead of STATUS='UNKNOWN'.

  • If the OPEN statement BLANK specifier is omitted, the default changes to BLANK='ZERO' instead of BLANK='NULL'.

IDE Equivalent

Visual Studio: Language > Enable FORTRAN 66 Semantics

Alternate Options

None