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  1. Qt
  2. QTBUG-98279

-lasan recorded in Qt6Core.prl when building Qt with address sanitizer

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Details

    • Bug
    • Resolution: Unresolved
    • P2: Important
    • None
    • 6.2.1, 6.3
    • Build System: CMake
    • None

    Description

      When configuring Qt with -sanitize address, we use ECMEnableSanitizers.cmake to add sanitizer support.
      It runs 

      link_libraries(asan)

      which adds an -lasan flag to all built Qt libs.

      Accidentally, that adds those flags to the prl files too.

      lib/libQt6Core.prl
5:QMAKE_PRL_LIBS = -lasan -lpthread
6:QMAKE_PRL_LIBS_FOR_CMAKE = -lasan;-lpthread

      Those -lasan link flags get added to apps when they are built with qmake and link against Qt6Core.
      But qmake has it's own sanitizer.prf that handles sanitizer flags that need to be added.

      As such, we should NOT record those -lasan flags in the .prl files of modules. It could lead to issues with linking the wrong library. And usually fsanitize-address takes care of linking the proper libs.

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-116102 [Win] If Qt is built with ASAN then end-user applications must also be built with ASAN

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-96859 "ASan runtime does not come first in initial library list" when running empty console application built with qmake

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-97933 Building Qt with gcc and ASan fails with ASan linking error

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-87989 "ASan runtime does not come first in initial library list" when building Qt Quick application with Qt configured with -sanitize address

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-92083 Building console project fails with linker errors

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
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              qtbuildsystem Qt Build System Team
              alexandru.croitor Alexandru Croitor
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              Dates

                Created:
                Updated:

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