# Wmissing-prototypes

Determines whether warnings are issued for missing prototypes.

## Syntax

Linux: | -Wmissing-prototypes -Wno-missing-prototypes

macOS: | -Wmissing-prototypes -Wno-missing-prototypes

Windows: | None

## Arguments

None

## Default

-Wno-missing-prototypes | No warnings are issued for missing prototypes.

## Description

Determines whether warnings are issued for missing prototypes.

If -Wmissing-prototypes is specified, it tells the compiler to detect global functions that are defined without a previous prototype declaration.

## IDE Equivalent

None

## Alternate Options

None

Parent topic: Compiler Diagnostic Options