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doc: Document __attribute keyword [PR87591]

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	PR c/87591
	* doc/extend.texi (Attributes): Document __attribute keyword.
	(Attribute Syntax): Here too.
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Sandra Loosemore
2026-02-27 03:46:27 +00:00
parent 43c5f5d767
commit 9a100f0525
1 changed files with 5 additions and 0 deletions
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@@ -1777,6 +1777,9 @@ and suffixed by two underscores; for example, the alternate name of
library header files in case they are included into files that have
redefined the base name of the attribute as a preprocessor macro.
GCC also accepts the keyword @code{__attribute} as a synonym for
@code{__attribute__}.
Some function attributes take one or more arguments that refer to
the function's parameters by their positions within the function parameter
list. Such attribute arguments are referred to as @dfn{positional arguments}.
@@ -9859,6 +9862,8 @@ This allows you to use them in header files without
being concerned about a possible macro of the same name. For example,
you may use the attribute name @code{__noreturn__} instead of @code{noreturn}.
GCC also accepts the keyword @code{__attribute} as a synonym for
@code{__attribute__}.
@subsubheading Label Attributes