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  1. Qt
  2. QTBUG-117052

Condition of feature ipc_posix erroneously evaluates to FALSE

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    • QNX
    • 828770c60 (dev), 5c9fa4ca4 (6.6), 9b5c3d310 (6.6.0)

      As described in https://lists.qt-project.org/pipermail/development/2023-September/044469.html ipc_posix is off despite the conditions are met:

       -- Performing Test HAVE_sysv_shm
 -- Performing Test HAVE_sysv_shm - Failed
 -- Performing Test HAVE_sysv_sem
 -- Performing Test HAVE_sysv_sem - Failed
 -- Performing Test HAVE_posix_shm
 -- Performing Test HAVE_posix_shm - Success
 -- Performing Test HAVE_posix_sem
 -- Performing Test HAVE_posix_sem - Success
...
  Defaulting legacy IPC to POSIX ......... no

      the feature definition is 

      qt_feature("ipc_posix"
    LABEL "Defaulting legacy IPC to POSIX"
    CONDITION TEST_posix_shm AND TEST_posix_sem AND (
        FEATURE_ipc_posix OR (APPLE AND QT_FEATURE_appstore_compliant)
        OR NOT (TEST_sysv_shm AND TEST_sysv_sem)
    )
)

      The following part of the condition already evaluates to FALSE:

      NOT (TEST_sysv_shm AND TEST_sysv_sem)

      DeMorganizing the condition resolves the issue, but there's clearly a glitch in the condition evaluator: QTBUG-117053.

        For Gerrit Dashboard: QTBUG-117052
        # Subject Branch Project Status CR V
        503980,2 CMake: Fix condition of the ipc_posix feature dev qt/qtbase Status: MERGED +2 0
        504381,2 CMake: Fix condition of the ipc_posix feature 6.6 qt/qtbase Status: MERGED +2 0
        504545,2 CMake: Fix condition of the ipc_posix feature 6.6.0 qt/qtbase Status: MERGED +2 0

            jbornema Joerg Bornemann
            jbornema Joerg Bornemann
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              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes