[Android] How to install under Linux QtSdk-offline-linux-x86_64-v1.2.1.run

An installation according to the official description : chmod u + x QtSdk-offline-linux-x86_64-v1.2.1.run
I use Terminal commander , run the above , suggesting that no such file or directory
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1. first into your SDK installation file directory . For example cd / home / ..
2. modify file attributes sudo chmod u + x QtSdk-offline-linux-x86_64-v1.2.1.run
3. execute sudo ./QtSdk-offline-linux-x86_64-v1.2.1.run. Graphical installer .

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/ usr / lib / libstdc + +. so.6: version `GLIBCXX_3.4.9 'not found

I downloaded a libstdc + +. so.6.0.13, regenerate a libstdc + +. s
but / usr / lib / libstdc + +. so.6: version `GLIBCXX_3.4.9 'not found
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halo is the path wrong, is under lib64
but another problem
execute sudo ./QtSdk-offline-linux-x86_64-v1.2.1.run

error while loading shared libraries: libstdc + +. so.6: wrong ELF class: ELFCLASS32
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I also encountered the same error , get the two days have not done it , please big Xia help solve it ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
------ eference --------------------------------------- < br> I also met this problem , heroes lie . . .
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same question landlord Xie Jue yet error while loading shared libraries: libstdc + +. so.6: wrong ELF class: ELFCLASS32
I am also the problem is the operating system 64 problem?
QQ897425998
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look at your installed software and your operating system , machine -digit ( 64/ 32 ) is not consistent ?