This revision was automatically updated to reflect the committed changes. Closed by commit rGa1f4e48c4aca: [clang][docs] Add note about using `-flto` with `-g` on macOS (authored by phil-blain, committed by JDevlieghere).
Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D82733/new/ https://reviews.llvm.org/D82733 Files: clang/docs/CommandGuide/clang.rst Index: clang/docs/CommandGuide/clang.rst =================================================================== --- clang/docs/CommandGuide/clang.rst +++ clang/docs/CommandGuide/clang.rst @@ -474,6 +474,16 @@ optimization. With "thin", :doc:`ThinLTO <../ThinLTO>` compilation is invoked instead. + .. note:: + + On Darwin, when using :option:`-flto` along with :option:`-g` and + compiling and linking in separate steps, you also need to pass + ``-Wl,-object_path_lto,<lto-filename>.o`` at the linking step to instruct the + ld64 linker not to delete the temporary object file generated during Link + Time Optimization (this flag is automatically passed to the linker by Clang + if compilation and linking are done in a single step). This allows debugging + the executable as well as generating the ``.dSYM`` bundle using :manpage:`dsymutil(1)`. + Driver Options ~~~~~~~~~~~~~~
Index: clang/docs/CommandGuide/clang.rst =================================================================== --- clang/docs/CommandGuide/clang.rst +++ clang/docs/CommandGuide/clang.rst @@ -474,6 +474,16 @@ optimization. With "thin", :doc:`ThinLTO <../ThinLTO>` compilation is invoked instead. + .. note:: + + On Darwin, when using :option:`-flto` along with :option:`-g` and + compiling and linking in separate steps, you also need to pass + ``-Wl,-object_path_lto,<lto-filename>.o`` at the linking step to instruct the + ld64 linker not to delete the temporary object file generated during Link + Time Optimization (this flag is automatically passed to the linker by Clang + if compilation and linking are done in a single step). This allows debugging + the executable as well as generating the ``.dSYM`` bundle using :manpage:`dsymutil(1)`. + Driver Options ~~~~~~~~~~~~~~
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