Qt 6.12 LTS is out! See what's new in the release
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Qt4 anf Qt5 instalaltion on offline
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You might want to be a bit more specific.
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Qt 4 has reached end of life a long time ago so if you really want to use it, you better run a virtual machine with a previous version of RHL that stills supports it, build it yourself or port your application / library to at least Qt 5.
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Qt 4 has reached end of life a long time ago so if you really want to use it, you better run a virtual machine with a previous version of RHL that stills supports it, build it yourself or port your application / library to at least Qt 5.