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  1. Qt
  2. QTBUG-104112

Document potential pitfalls of using versionless targets and packages in CMake project code

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    • 603d986eb (dev), 4dc6c2843 (6.7), f32b5dfff (6.6), 01c09bcce (tqtc/lts-6.5)

    Description

      If an installed CMake project provides imported targets that depend on / link against versionless Qt targets, these targets can cause issues when used in another project that mixes both Qt5 and Qt6 libraries.

      See example here https://bugreports.qt.io/browse/QTBUG-83774?focusedCommentId=665429&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-665429

      There are also some other cases that might not work as expected (the original QTBUG-83774 description).

      We should consider documenting these cases and provide some recommendations.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-97097 Calling find_package Qt 5 before Qt 6 in CMakeLists.txt causes CMake Generate step failed

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-114706 exported cmake targets link versionless targets when they shouldn't

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

          Task - A task that needs to be done. QTBUG-113277 CMake: Make all examples use Qt6:: instad of Qt:: in target_link_libraries

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • In Progress
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-83774 Versionless CMake config files and targets create an incompatible dialect

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-104112
          # Subject Branch Project Status CR V
          525058,2 Doc: Document pitfalls of using versionless Qt targets dev qt/qtdoc Status: MERGED +2 0
          525165,2 Doc: Document pitfalls of using versionless Qt targets 6.7 qt/qtdoc Status: MERGED +2 0
          525261,2 Doc: Document pitfalls of using versionless Qt targets 6.6 qt/qtdoc Status: MERGED +2 0
          525400,2 Doc: Document pitfalls of using versionless Qt targets tqtc/lts-6.5 qt/tqtc-qtdoc Status: MERGED +2 0

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              jbornema Joerg Bornemann
              alexandru.croitor Alexandru Croitor
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              Dates

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                Updated:
                Resolved:

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