Building from source is often required on modern distributions since binary installers for Qt 4 are largely unavailable. Detailed build instructions are provided by projects like Linux From Scratch. Using Personal Package Archives (PPAs)
sudo add-apt-repository ppa:rock-core/qt4 sudo apt update sudo apt install libqtcore4 libqtgui4 qt4-dev-tools Use code with caution. qt 4 download linux
Some Linux ecosystems still provide community-maintained versions of legacy libraries. Qt - ArchWiki Building from source is often required on modern