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  1. Qt
  2. QTBUG-38720

SSE defines check build error for some Mac hardware configurations

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    • None
    • 4.8.6
    • Build System, Core: QString and Unicode
    • None
    • Mac OS X 10.6 - 10.9
    • macOS

      On some Mac hardware configurations, setting '-no-ssse3' or similar < sse4.x negative option, cascades up and turns off all greater sse* options.

      However, there are define checks in src/corelib/tools/qstring.cpp mergeQuestionMarks() that only check for _SSE4_x_, ignoring whether the associated option was turned off via a command line configure option.

      See https://github.com/Homebrew/homebrew/issues/28859#issuecomment-41865873 , where -no-ssse3 configure option is used, which should turn off SSE4 code, but _SSE4_x_ code is still executed.

      The attached patch ensures the QT_HAVE_SSE4_x defines are honored.

        1. qt-4.8.6-sse-defined.patch
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            thiago Thiago Macieira
            dakcarto Larry Shaffer
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