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cargo_without_cmake does not link with ld.bfd #223

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ahayzen-kdab opened this issue Aug 26, 2022 · 5 comments
Open

cargo_without_cmake does not link with ld.bfd #223

ahayzen-kdab opened this issue Aug 26, 2022 · 5 comments
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🪲 bug Something isn't working 🔨 build system Issues related to integrating CXX-Qt into CMake/Cargo ⬆️ upstream blocked on an upstream issue

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@ahayzen-kdab
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Using ld with the cargo_without_cmake fails to link on Linux.
@ahayzen-kdab ahayzen-kdab added the 🪲 bug Something isn't working label Aug 26, 2022
@Be-ing
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Be-ing commented Aug 26, 2022

I'm not sure there is anything we can do about this. I think it is a bug in GNU ld.

@ahayzen-kdab
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I'm not sure there is anything we can do about this. I think it is a bug in GNU ld.

Create a minimal example of the linking failure and report upstream to GNU ld to see if they have any ideas if it's a bug or something missing?

@Be-ing
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Be-ing commented Sep 28, 2022

Here are the link errors with GNU ld:

error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-m64" "/tmp/rustcgqm0nC/symbols.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.1h8iyrq9nc5hjy66.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.1mt9xfcj10qy0y9g.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.1p1hzdjc2rmly6l9.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.1s4h681khl34bihf.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.1tf27nqjrjt5j0ng.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.1wj1dekcgf8w2c45.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.22aucna89swqjopd.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.25yrgy7q1u9pfd7f.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2k5fbn8irlzyzvn0.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2k7h5yjw44hk98tq.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2lazy5h3nkfdby6t.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2nzpbe9qouas5qm2.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2ogbmglngedyeq0c.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2pd0t5lafhm5kbc7.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2wgzl85lh8s9wxw1.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2wx3auulnix3bv1q.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.2yglqylmth9rc7g6.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3426c2a9r2z62k7j.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.36lg7n2unkalf1ie.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.36wvnnlen3qcvhdh.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.384kclii0lc7tdi9.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.38mopze33m93h9s5.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.38yovcfeo4a22q7w.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3ci1td78pvpz25cr.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3g6tapi5ssy0ndot.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3gbj4a7fwvutt0t7.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3hfcnk4vryhaylr3.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3i36skgy7b7wo2ss.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3jp45zjn929guht8.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3mz6nwtmr0pfycxd.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3pgiunr8tsr3y6js.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3w7lioskb51iw9p6.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.3yom3hloykdzs1fl.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.430cjy60utrab8cc.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.46qxtbq9cbu5bere.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4eu1qg8b7n9r2m8c.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4g3b2wo4doeob1ph.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4ku17djk8wb68wez.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4opsjc4fj9r88icm.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4qb7ip65ebgmkwis.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4rkggtep58j58vb3.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4vn8aoufhsr6cve3.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.4xz2nlhapi2o5jkk.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.50hyl4r6c960q47o.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.51l3rv9ktmd4wpnf.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.51o8fa7d5juz3ni.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.52mv13g8782uhwm7.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.56ikzvsm4okhqqs0.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.5aql96veddgi8sm4.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.5c1m7euyx8l96qgb.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.5c1ypfefqmmji0jj.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.5e7cvoxvxlhit4ox.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.fsc0cwhhscsxh4p.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.ic47u0phy8uovcu.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.k7gwupop2wpyill.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.llk1dn2wan0kgqz.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.y403cnbuikq4mqg.rcgu.o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3.38pbifuqyjcwup6o.rcgu.o" "-Wl,--as-needed" "-L" "/home/be/sw/cxx-qt/target/debug/deps" "-L" "/usr/lib64" "-L" "/home/be/sw/cxx-qt/target/debug/build/qml-minimal-no-cmake-29c8de0c6f6e43e3/out" "-L" "/home/be/sw/cxx-qt/target/debug/build/cxx-3c36e17d3db42728/out" "-L" "/home/be/sw/cxx-qt/target/debug/build/link-cplusplus-d55b9af80b7e3623/out" "-L" "/usr/lib64" "-L" "/home/be/sw/cxx-qt/target/debug/build/cxx-qt-lib-307fa3930074bcd7/out" "-L" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lQt6Network" "-lQt6Qml" "-lQt6Gui" "-lQt6Core" "-Wl,-Bstatic" "-lcxx-qt-gen" "-Wl,-Bdynamic" "-lstdc++" "-Wl,-Bstatic" "/home/be/sw/cxx-qt/target/debug/deps/libcxx_qt_lib-d9853f3bf6e6f95b.rlib" "/home/be/sw/cxx-qt/target/debug/deps/libcxx-be808adb27e7e24d.rlib" "/home/be/sw/cxx-qt/target/debug/deps/liblink_cplusplus-b8eedc8afd5892f7.rlib" "-Wl,--start-group" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-5670385a2fe8b60b.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-fd56ba6dbf7aaecc.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-b8acf8e5c2e85baa.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-1706edefffdca0a2.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-f483302e0b13708e.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-725b0718fc18e1ed.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-de685fcf2157e6fb.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-f613ac3eda05b9ff.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-3de98a7d049af6a1.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-c12183655bdce152.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-0fc7beea925de7e3.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8c34825485bf59dc.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-ba5f7e926e729d81.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-643de0950163a839.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-539ea2f72ef89687.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-871432094bb4c885.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-ef1a8ee61f2e39bf.rlib" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-f1646747442c1c7b.rlib" "-Wl,--end-group" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ff283b4bf550fa1c.rlib" "-Wl,-Bdynamic" "-lQt6Core" "-lQt6Gui" "-lstdc++" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/home/be/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/home/be/sw/cxx-qt/target/debug/deps/qml_minimal_no_cmake-25e604b0524707e3" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
  = note: /usr/bin/ld: /home/be/sw/cxx-qt/target/debug/build/qml-minimal-no-cmake-29c8de0c6f6e43e3/out/libcxx-qt-gen.a(run.o): in function `run_cpp':
          /home/be/sw/cxx-qt/examples/cargo_without_cmake/src/cpp/run.cpp:40: undefined reference to `QQmlApplicationEngine::QQmlApplicationEngine(QObject*)'
          /usr/bin/ld: /home/be/sw/cxx-qt/examples/cargo_without_cmake/src/cpp/run.cpp:43: undefined reference to `QQmlApplicationEngine::objectCreated(QObject*, QUrl const&)'
          /usr/bin/ld: /home/be/sw/cxx-qt/examples/cargo_without_cmake/src/cpp/run.cpp:55: undefined reference to `QQmlApplicationEngine::load(QUrl const&)'
          /usr/bin/ld: /home/be/sw/cxx-qt/examples/cargo_without_cmake/src/cpp/run.cpp:58: undefined reference to `QQmlApplicationEngine::~QQmlApplicationEngine()'
          /usr/bin/ld: /home/be/sw/cxx-qt/examples/cargo_without_cmake/src/cpp/run.cpp:58: undefined reference to `QQmlApplicationEngine::~QQmlApplicationEngine()'
          /usr/bin/ld: /home/be/sw/cxx-qt/target/debug/build/qml-minimal-no-cmake-29c8de0c6f6e43e3/out/libcxx-qt-gen.a(run.o): in function `std::enable_if<(QtPrivate::FunctionPointer<run_cpp::$_0>::ArgumentCount==(-(1)))&&(!std::is_convertible_v<run_cpp::$_0, char const*>), QMetaObject::Connection>::type QObject::connect<void (QQmlApplicationEngine::*)(QObject*, QUrl const&), run_cpp::$_0>(QtPrivate::FunctionPointer<void (QQmlApplicationEngine::*)(QObject*, QUrl const&)>::Object const*, void (QQmlApplicationEngine::*)(QObject*, QUrl const&), QObject const*, run_cpp::$_0, Qt::ConnectionType)':
          /usr/include/qt6/QtCore/qobject.h:339: undefined reference to `QQmlApplicationEngine::staticMetaObject'
          /usr/bin/ld: /home/be/sw/cxx-qt/target/debug/build/qml-minimal-no-cmake-29c8de0c6f6e43e3/out/libcxx-qt-gen.a(run.o): in function `int qmlRegisterType<MyObject>(char const*, int, int, char const*)':
          /usr/include/qt6/QtQml/qqml.h:348: undefined reference to `QQmlPrivate::qmlregister(QQmlPrivate::RegistrationType, void*)'
          /usr/bin/ld: /home/be/sw/cxx-qt/target/debug/build/qml-minimal-no-cmake-29c8de0c6f6e43e3/out/libcxx-qt-gen.a(run.o): in function `~QQmlElement':
          /usr/include/qt6/QtQml/qqmlprivate.h:134: undefined reference to `QQmlPrivate::qdeclarativeelement_destructor(QObject*)'
          collect2: error: ld returned 1 exit status
          
  = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
  = note: use the `-l` flag to specify native libraries to link
  = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)

@ahayzen-kdab
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It has been found that ld.gold works but ld.bfd does not work, limiting the impact of this bug.

@Be-ing Be-ing mentioned this issue Dec 18, 2022
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@Be-ing Be-ing added the 🔨 build system Issues related to integrating CXX-Qt into CMake/Cargo label Jul 7, 2023
@Be-ing
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Be-ing commented Jul 7, 2023

The mitigation for this is to call setup_linker which tells Cargo to lld, ld.gold, or mold in preference to ld.bfd.

@Be-ing Be-ing changed the title cargo_without_cmake does not link with ld only ldd or mold on Linux cargo_without_cmake does not link with ld.bfd Jul 7, 2023
@Be-ing Be-ing added the ⬆️ upstream blocked on an upstream issue label Jul 7, 2023
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