This revision was automatically updated to reflect the committed changes. Closed by commit rG72bdb41a06a2: [Docs] Document --lto-whole-program-visibility (authored by tejohnson).
Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D75655/new/ https://reviews.llvm.org/D75655 Files: clang/docs/LTOVisibility.rst Index: clang/docs/LTOVisibility.rst =================================================================== --- clang/docs/LTOVisibility.rst +++ clang/docs/LTOVisibility.rst @@ -35,6 +35,16 @@ (e.g. classes declared in unnamed namespaces) also receive hidden LTO visibility. +During the LTO link, all classes with public LTO visibility will be refined +to hidden LTO visibility when the ``--lto-whole-program-visibility`` lld linker +option is applied (``-plugin-opt=whole-program-visibility`` for gold). This flag +can be used to defer specifying whether classes have hidden LTO visibility until +link time, to allow bitcode objects to be shared by different LTO links. +Due to an implementation limitation, symbols associated with classes with hidden +LTO visibility may still be exported from the binary when using this flag. It is +unsafe to refer to these symbols, and their visibility may be relaxed to hidden +in a future compiler release. + A class defined in a translation unit built without LTO receives public LTO visibility regardless of its object file visibility, linkage or other attributes.
Index: clang/docs/LTOVisibility.rst =================================================================== --- clang/docs/LTOVisibility.rst +++ clang/docs/LTOVisibility.rst @@ -35,6 +35,16 @@ (e.g. classes declared in unnamed namespaces) also receive hidden LTO visibility. +During the LTO link, all classes with public LTO visibility will be refined +to hidden LTO visibility when the ``--lto-whole-program-visibility`` lld linker +option is applied (``-plugin-opt=whole-program-visibility`` for gold). This flag +can be used to defer specifying whether classes have hidden LTO visibility until +link time, to allow bitcode objects to be shared by different LTO links. +Due to an implementation limitation, symbols associated with classes with hidden +LTO visibility may still be exported from the binary when using this flag. It is +unsafe to refer to these symbols, and their visibility may be relaxed to hidden +in a future compiler release. + A class defined in a translation unit built without LTO receives public LTO visibility regardless of its object file visibility, linkage or other attributes.
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