Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 3/31/2023
Public

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Document Table of Contents

Attributes

Attributes are a way to provide additional information about a declaration to the compiler. The C+11 attribute syntax is consistent with the C2x standard.

Use Attributes

The compiler supports three ways to add attributes to your program:

  • Gnu Syntax
    __attribute__((attribute_name(arguments)))
  • Microsoft Syntax
    __declspec(attribute_name(argument))
  • C++11 Standardized Attribute Syntax (part of the C++11 language standard)
    [[attribute_name(arguments)]]
    [[attribute-namespace :: attribute_name(arguments)]]

Some attributes are available for both Intel® microprocessors and non-Intel microprocessors but they may perform additional optimizations for Intel® microprocessors than they perform for non-Intel microprocessors. Refer to the individual attribute name for a detailed description.