Introduction

After Qt5.5, the official Qt has no 32-bit installation package for Linux system. The development environment requires 32-bit Qt to be installed only through source code compilation. The system is 32-bit Linux Mint with Qt5.8 installed

Compile and install process

Download source code

Source Download Website: http://download.qt.io/archive/qt/

All versions of Qt installation packages and source code are available. I downloaded qt-everywhere-opensource-src-5.8.0.tar.gz.

To configure

After decompressing and entering the source directory, configure compilation options

View Help Documents

 $ cat README

The official help document is not very clear, but it gives a link to compile Qt5 from git, and the instructions are very detailed.

# Building Qt5 from git

 See http://wiki.qt.io/Building_Qt_5_from_Git and README.git
 for more information.
 See http://wiki.qt.io/Qt_5 for the reference platforms.

Installation of required tools

$ sudo apt-get install build-essential perl python

Install xcb Libraries

$ sudo apt-get install '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev

Install Multimedia Library

$ sudo apt-get install libasound2-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev

Additional installation is required if you need to use the libraries of WebEngine and WebKit

$ sudo apt-get install flex bison gperf libicu-dev libxslt-dev ruby

$ sudo apt-get install libssl-dev libxcursor-dev libxcomposite-dev libxdamage-dev libxrandr-dev libdbus-1-dev libfontconfig1-dev libcap-dev libxtst-dev libpulse-dev libudev-dev libpci-dev libnss3-dev libasound2-dev libxss-dev libegl1-mesa-dev gperf bison

configuration option

$ .\configure -confirm-license -opensource -prefix $PWD\qtbase -release -nomake tests -nomake examples -skip qtmacextras  -skip qtandroidextras

• - confirm-license-opensource uses open source protocols

• - prefix Specifies Installation Directory

• - release Install release Version

• - nomake tests-nomake examples do not install test and sample modules

• - Skp can skip some source modules for compilation, and here I skip apparently unused Apple and Android modules.

  Compile source code

  You can compile a base package first

  $ make -j4 module-qtbase
  

  After successful compilation, compile all

  $ make -j4	Long time, compiled with 4 threads
  

  install

  $ sudo make install
  

  Configuring Qt paths

  Terminal command open

  $ sudo vim /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf
  

  32-bit system

  $ sudo vim /usr/lib/i386-linux-gnu/qt-default/qtchooser/default.conf 
  

  Change the first line to the bin path of the Qt installation directory, and the second line to the Qt installation path.

  /home/dkw/qt-everywhere-opensource-src-5.8.0/qtbase/bin
  /home/dkw/qt-everywhere-opensource-src-5.8.0/qtbase
  

  Install qtCreator

  After entering the source directory

  $ qmake -r
  $ make -j4
  $ sudo make install INSTALL_ROOT=$INSTALL_DIRECTORY //INSTALL_DIRECTORY is your installation directory