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  1. Qt
  2. QTBUG-86879

Cannot build Qt sources with Clang-10 on Ubuntu 18 when ASan is enabled

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Details

    • Bug
    • Resolution: Done
    • P3: Somewhat important
    • None
    • 6.0
    • Build System: CMake
    • None
    • 303178748595f487cffc7249c8dc9bd46432253b (qt/qtbase/dev)

    Description

      Running make on Ubuntu fails to build Qt from sources with address sanitizer on. The messages I see:

      qt5/qtbase/src/corelib/kernel/qmetatype.cpp:115: undefined reference to `__asan_option_detect_stack_use_after_return'
qt5/qtbase/src/corelib/kernel/qmetatype.cpp:115: undefined reference to `__asan_stack_malloc_2'
qt5/qtbase/src/corelib/kernel/qmetatype.cpp:115: undefined reference to `__asan_report_store8'
qt5/qtbase/src/corelib/kernel/qmetatype.cpp:118: undefined reference to `__asan_report_load8'

      So it looks like something is not linked to binaries when building.

      At the same time, GCC 7 with address sanitizer works without issues, so it seems that clang/llvm is problematic.

      My setup:

      Ubuntu 18.04

      Clang-10 (with LLVM 10 tools)

      CMake arguments to enable the ASan build:

      -DCMAKE_LINKER=lld-10 -DECM_ENABLE_SANITIZERS=address -DCMAKE_CXX_COMPILER=clang++-10 -DFEATURE_sanitize_address=ON -DCMAKE_C_COMPILER=clang-10

       

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-83929 Scan through and port all defines, compile and link flags from mkspecs/foo/bar.conf files to relevant Qt::Platform or Qt::PlatformCommonInternal targets

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-86879
          # Subject Branch Project Status CR V
          315282,2 CMake: Fix sanitizer build when using Clang on Linux dev qt/qtbase Status: MERGED +2 0

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              alexandru.croitor Alexandru Croitor
              agolubev Andrei Golubev
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              Dates

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                Updated:
                Resolved:

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