Qt offline installer and compatible c++ compiler installation

Question

I ve been trying to download and install QT . I want to install the free version on multiple PC's and i want to use it for building very simple c++ desktop applications .

I tried to download and install the online free version installer but the internet speed stopped the installation process multiple times with the error

Please check your connection

Unfortunately WIFI connection and speed are weak because the institute i am teaching at is located in a small village. Adding to the previous please note that hard drive space is critical for these PC's because they are quite old (i3) 2GB of RAM and 256 HDD.

• what i tried to do ?

I ended up trying to install QT from the offline installer from this link : msvc2012_opengl-x86_64-offline.exe

It installed just fine , but then i get the following error :

qt creator needs a compiler set up to build. configure a compiler in the kit options

I found a lot of solutions here for adding a compiler from Tools>Options.... and also tried to configure MIN_GW compiler following the instructions from the QT documentation Adding a Compiler section.

When i add the compilers the compiler prompts an exclamation mark and a prompt saying that the compiler is not compatible to this version of QT .

• What i want to do ?

Ideally i would want to find a compatible compiler for the offline installer version OR maybe if someone could suggest any working links for an offline QT installer and a compatible c++ compiler for Windows 10.

Answer 1

The easiest way is to use the MinGW version of Qt, it includes the required MinGW compiler. It is available from the same link you provided. (However I would recommend you to use 5.9 or 5.6 which are both LTS versions.)

Otherwise you have to make sure that you have the matching MS Visual Studio version installed. For msvc2012_opengl-x86_64-offline.exe you need Visual Studio 2012. The express editions usually work, but not for 64 bit, which is what you downloaded. (The community editions of later Visual Studios do include a 64 bit compiler.)