# VK_NO_STDDEF_H(3) Manual Page

## Name

VK_NO_STDDEF_H - Control definition of types

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## Description

If the `VK_NO_STDDEF_H` macro is defined by the application at compile time, `size_t`, must also be defined by the application. Otherwise, the Vulkan headers will not compile. If `VK_NO_STDDEF_H` is not defined, the system `<stddef.h>` is used to define this type.

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0