qt-select

TLDR

Show current Qt version

$ qtchooser -print-env

List available versions

$ qtchooser -l

Select Qt version

$ export QT_SELECT=[qt5]

Run tool with specific Qt

$ qtchooser -run-tool=[qmake] -qt=[5]

DESCRIPTION

qtchooser (or qt-select) allows switching between multiple Qt installations. It manages which Qt version's tools (qmake, moc, etc.) are used by default.

PARAMETERS

-l, --list-versions

List available Qt versions.

-print-env

Print environment settings.

-run-tool=tool

Run specific tool.

-qt=version

Select Qt version.

$ # List available
qtchooser -l

# Show current
qtchooser -print-env

# Use Qt 5
export QT_SELECT=qt5
qmake --version

# Use Qt 6
export QT_SELECT=qt6
qmake --version

# Run specific qmake
qtchooser -run-tool=qmake -qt=5 --version

CONFIGURATION

$ # System configs
/usr/share/qtchooser/

# User config
~/.config/qtchooser/

# Config file format (qt5.conf):
/usr/lib/qt5/bin
/usr/lib/qt5/lib

ENVIRONMENT

$ QT_SELECT=qt5 # Default version
QTCHOOSER_NO_GLOBAL_DIR=1 # Ignore system configs

CAVEATS

Not available on all distributions. May conflict with manually installed Qt. Use environment variable for persistent selection.

HISTORY

qtchooser was created to manage multiple Qt installations on Linux systems with distribution packaging.