CheckAttribute.md

• Source code: cmake/modules/PHP/CheckAttribute.cmake

PHP/CheckAttribute

This module checks if GNU C function or variable attribute is supported by the C compiler:

include(PHP/CheckAttribute)

Commands

This module provides the following commands:

php_check_function_attribute(<attribute> <result-var>)
php_check_variable_attribute(<attribute> <result-var>)

• <attribute> Name of the attribute to check.

• <result-var> Cache variable name to store the result of whether the C compiler supports the attribute <attribute>.

Supported function attributes:

• ifunc
• target
• visibility

Supported variable attributes:

• aligned

Examples

Basic usage:

# CMakeLists.txt
include(PHP/CheckAttribute)

php_check_function_attribute(ifunc HAVE_FUNC_ATTRIBUTE_IFUNC)
php_check_variable_attribute(aligned HAVE_ATTRIBUTE_ALIGNED)