# extfpp

Specifies file extensions to be recognized as a file to be preprocessed by the Fortran preprocessor.

## Syntax

Linux: | None

macOS: | None

Windows: | /extfpp:ext

## Arguments

ext | Are the file extensions to be preprocessed by the Fortran preprocessor.

## Default

OFF | Only the file extensions recognized by the compiler are preprocessed by fpp.

## Description

This option specifies file extensions (ext) to be recognized as a file to be preprocessed by the Fortran preprocessor (fpp). It is useful if your source file has a nonstandard extension.

You can specify one or more file extensions. A leading period before each extension is optional; for example, /extfpp:myfpp and /extfpp:.myfpp are equivalent.

## IDE Equivalent

None

## Alternate Options

None

Parent topic: Miscellaneous Options