gnu::aligned(3attr)                                        gnu::aligned(3attr)

NAME
       gnu::aligned - set alignment of an object

SYNOPSIS
       [[gnu::aligned(alignment)]]
       [[gnu::aligned]]

DESCRIPTION
       This attribute can be applied to a type or a variable, and sets its
       alignment in bytes.

       If the alignment is not specified, the maximum alignment is used.  This
       is equivalent to

           [[gnu::aligned(alignof(max_align_t))]]

VERSIONS
       __attribute__((aligned(alignment)))

       __declspec(align(alignment))

       C11 provides the _Alignas() type specifier, which has similar
       semantics.

STANDARDS
       GNU.

HISTORY
       gcc, g++, clang 11, clang++ 2.8.0.

CAVEATS
       This attribute can increase the natural alignment of a type, but it
       can't decrease it.

       The linker may limit the maximum alignment that can be applied.

Linux man-pages 6.15              2025-06-28               gnu::aligned(3attr)