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  1. Qt
  2. QTBUG-56813

Build with gcc-7 fails due to removed __builtin_clzs/__builtin_ctzs functions

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Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 5.8.0
    • 5.7.0
    • Core: Containers and Algorithms
    • None
    • Linux, x86_64, gcc-6.3, qt-5.7, haswell cpu with bmi1/bmi2 support
    • bb0f29f82b934b489f1679b7b72f094aa287be3c

    Description

      upcoming GCC-6.3 and 7 removed the "_builtin_clzs" and "_builtin_ctzs" functions, which leads to build errors in all qtcore modules, src/corelib/tools/qalgorithms.h

      I've attached a patch which seems to work (KDE-5 still runs just fine).

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            allan.jensen Allan Sandfeld Jensen
            mlauss Manuel Lauss
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            Dates

              Created:
              Updated:
              Resolved:

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