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    • UNSOLVED How to build a Windows 64-bit Qt app using MinGW-64-bit
      General and Desktop • mingw64 windows 7 64 bi 64-bit • • smoyertech  

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      Hi, You first have to build a 64bit Qt with MinGW. This wiki article might help you get started. Hope it helps
    • SOLVED Create 32 and 64bit Kits on windows
      Tools • windows 32bit kit 64-bit • • davecotter  

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      yes, specify 32 and 64 for msvc2015 i was able to ignore the warnings the kits i picked worked
    • SOLVED Qt MinGW 64-bit
      General and Desktop • mingw 64-bit • • satysin  

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      @yigene To add to @mrjj : does your app need that amount of memory? If not and it does not have memory leaks than there is no real reason to have it as 64bit.