This macro is used to enable -Wthread-safety annotations on libc++'s
``std::mutex`` and ``std::lock_guard``. By default these annotations are
disabled and must be manually enabled by the user.
+
+**_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS**:
+ This macro is used to disable all visibility annotations inside libc++.
+ Defining this macro and then building libc++ with hidden visibility gives a
+ build of libc++ which does not export any symbols, which can be useful when
+ building statically for inclusion into another library.
#ifdef _WIN32
-#if defined(_LIBCPP_DISABLE_DLL_IMPORT_EXPORT)
+#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# define _LIBCPP_DLL_VIS
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
#endif // _WIN32
#ifndef _LIBCPP_HIDDEN
+#if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
+#else
+#define _LIBCPP_HIDDEN
+#endif
#endif
#ifndef _LIBCPP_FUNC_VIS
+#if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
+#else
+#define _LIBCPP_FUNC_VIS
+#endif
#endif
#ifndef _LIBCPP_TYPE_VIS
-# if __has_attribute(__type_visibility__)
-# define _LIBCPP_TYPE_VIS __attribute__ ((__type_visibility__("default")))
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+# if __has_attribute(__type_visibility__)
+# define _LIBCPP_TYPE_VIS __attribute__ ((__type_visibility__("default")))
+# else
+# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
+# endif
# else
-# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
+# define _LIBCPP_TYPE_VIS
# endif
#endif
#endif
#ifndef _LIBCPP_EXCEPTION_ABI
+#if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
+#else
+#define _LIBCPP_EXCEPTION_ABI
+#endif
#endif
#ifndef _LIBCPP_ENUM_VIS
-# if __has_attribute(__type_visibility__)
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default")))
# else
# define _LIBCPP_ENUM_VIS
#endif
#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-# if __has_attribute(__type_visibility__)
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__type_visibility__("default")))
# else
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
#endif
#ifndef _LIBCPP_INLINE_VISIBILITY
+#if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__visibility__("hidden"), __always_inline__))
+#else
+#define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__always_inline__))
+#endif
#endif
#ifndef _LIBCPP_ALWAYS_INLINE
+#if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__visibility__("hidden"), __always_inline__))
+#else
+#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#endif
#endif
#ifndef _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
-# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__((__visibility__("default"), __always_inline__))
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__((__visibility__("default"), __always_inline__))
+# else
+# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__((__always_inline__))
+# endif
#endif
#ifndef _LIBCPP_PREFERRED_OVERLOAD