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QLibraryInfo Class

The QLibraryInfo class provides information about the Qt library. More...

Header: #include <QLibraryInfo>
CMake: find_package(Qt6 REQUIRED COMPONENTS Core)
target_link_libraries(mytarget PRIVATE Qt6::Core)
qmake: QT += core

Public Types

enum LibraryPath { PrefixPath, DocumentationPath, HeadersPath, LibrariesPath, LibraryExecutablesPath, …, SettingsPath }

Static Public Members

bool isDebugBuild()
QString path(QLibraryInfo::LibraryPath p)
QVersionNumber version()

Detailed Description

Many pieces of information are established when Qt is configured and built. This class provides an abstraction for accessing that information. By using the static functions of this class, an application can obtain information about the instance of the Qt library which the application is using at run-time.

You can also use a qt.conf file to override the hard-coded paths that are compiled into the Qt library. For more information, see the Using qt.conf documentation.

See also QSysInfo and Using qt.conf.

Member Type Documentation

enum QLibraryInfo::LibraryPath

This enum type is used to query for a specific path:

Constant Value Description
QLibraryInfo::PrefixPath 0 The default prefix for all paths.
QLibraryInfo::DocumentationPath 1 The path to documentation upon install.
QLibraryInfo::HeadersPath 2 The path to all headers.
QLibraryInfo::LibrariesPath 3 The path to installed libraries.
QLibraryInfo::LibraryExecutablesPath 4 The path to installed executables required by libraries at runtime.
QLibraryInfo::BinariesPath 5 The path to installed Qt binaries (tools and applications).
QLibraryInfo::PluginsPath 6 The path to installed Qt plugins.
QLibraryInfo::QmlImportsPath 7 The path to installed QML extensions to import.
QLibraryInfo::Qml2ImportsPath QmlImportsPath This value is deprecated. Use QmlImportsPath instead.
QLibraryInfo::ArchDataPath 8 The path to general architecture-dependent Qt data.
QLibraryInfo::DataPath 9 The path to general architecture-independent Qt data.
QLibraryInfo::TranslationsPath 10 The path to translation information for Qt strings.
QLibraryInfo::ExamplesPath 11 The path to examples upon install.
QLibraryInfo::TestsPath 12 The path to installed Qt testcases.
QLibraryInfo::SettingsPath 100 The path to Qt settings. Not applicable on Windows.

See also path().

Member Function Documentation

[static, since 5.0] bool QLibraryInfo::isDebugBuild()

Returns true if this build of Qt was built with debugging enabled, or false if it was built in release mode.

This function was introduced in Qt 5.0.

[static, since 6.0] QString QLibraryInfo::path(QLibraryInfo::LibraryPath p)

Returns the path specified by p.

This function was introduced in Qt 6.0.

[static, since 5.8] QVersionNumber QLibraryInfo::version()

Returns the version of the Qt library.

This function was introduced in Qt 5.8.

See also qVersion().

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