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[libc++] Remove conditional for attributes that are always available #126879

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merged 1 commit into from
Feb 12, 2025
Merged

[libc++] Remove conditional for attributes that are always available #126879

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55 changes: 11 additions & 44 deletions libcxx/include/__config
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Original file line number Diff line number Diff line change
Expand Up @@ -1119,18 +1119,23 @@ typedef __char32_t char32_t;

// Optional attributes - these are useful for a better QoI, but not required to be available

# define _LIBCPP_NOALIAS __attribute__((__malloc__))
# define _LIBCPP_NODEBUG [[__gnu__::__nodebug__]]
# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__)))
# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100)))
# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \
__attribute__((__format__(archetype, format_string_index, first_format_arg_index)))
# define _LIBCPP_PACKED __attribute__((__packed__))

// Use a function like macro to imply that it must be followed by a semicolon
# define _LIBCPP_FALLTHROUGH() [[fallthrough]]

# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
# else
# define _LIBCPP_NO_CFI
# endif

# if __has_attribute(__malloc__)
# define _LIBCPP_NOALIAS __attribute__((__malloc__))
# else
# define _LIBCPP_NOALIAS
# endif

# if __has_attribute(__using_if_exists__)
# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__))
# else
Expand All @@ -1149,15 +1154,6 @@ typedef __char32_t char32_t;
# define _LIBCPP_DIAGNOSE_WARNING(...)
# endif

// Use a function like macro to imply that it must be followed by a semicolon
# if __has_cpp_attribute(fallthrough)
# define _LIBCPP_FALLTHROUGH() [[fallthrough]]
# elif __has_attribute(__fallthrough__)
# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
# else
# define _LIBCPP_FALLTHROUGH() ((void)0)
# endif

# if __has_cpp_attribute(_Clang::__lifetimebound__)
# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]]
# else
Expand All @@ -1170,8 +1166,6 @@ typedef __char32_t char32_t;
# define _LIBCPP_NOESCAPE
# endif

# define _LIBCPP_NODEBUG [[__gnu__::__nodebug__]]

# if __has_cpp_attribute(_Clang::__no_specializations__)
# define _LIBCPP_NO_SPECIALIZATIONS \
[[_Clang::__no_specializations__("Users are not allowed to specialize this standard library entity")]]
Expand All @@ -1191,33 +1185,6 @@ typedef __char32_t char32_t;
# define _LIBCPP_PREFERRED_NAME(x)
# endif

# if __has_attribute(__no_sanitize__)
# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__)))
# else
# define _LIBCPP_NO_SANITIZE(...)
# endif

# if __has_attribute(__init_priority__)
# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100)))
# else
# define _LIBCPP_INIT_PRIORITY_MAX
# endif

# if __has_attribute(__format__)
// The attribute uses 1-based indices for ordinary and static member functions.
// The attribute uses 2-based indices for non-static member functions.
# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \
__attribute__((__format__(archetype, format_string_index, first_format_arg_index)))
# else
# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */
# endif

# if __has_attribute(__packed__)
# define _LIBCPP_PACKED __attribute__((__packed__))
# else
# define _LIBCPP_PACKED
# endif

# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases)
# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
# else
Expand Down