Commits on Source (4)
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In practice, Qt was already using the system png by accident, because the png is almost always built and installed before Qt is configured.
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Recently, the contrib libjpeg was changed to libjpeg-turbo with some improvements over libjpeg [1]. While Qt also bundles libjpeg-turbo, it is better to only build one copy. [1]. 4a1bd36f
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d6495036
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This will prevent using the bundled "harfbuzz-ng" which is really harfbuzz 1.7.4. The bundled "harfbuzz", which a very old version, is still compiled and linked in however, and can't be disabled [1]. [1]. https://bugreports.qt.io/browse/QTBUG-104647
6ecdd0ac