520 lines
21 KiB
Plaintext
520 lines
21 KiB
Plaintext
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Qt 5.6 introduces many new features and improvements along with bug fixes
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over the 5.5.x series. For more details, refer to the online documentation
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included in this distribution. The documentation is also available online:
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http://doc.qt.io/qt-5.6
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The Qt version 5.6 series is binary compatible with the 5.5.x series.
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Applications compiled for 5.5 will continue to run with 5.6.
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Some of the changes listed in this file include issue tracking numbers
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corresponding to tasks in the Qt Bug Tracker:
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http://bugreports.qt.io/
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Each of these identifiers can be entered in the bug tracker to obtain more
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information about a particular change.
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****************************************************************************
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* Deprecation Notice *
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****************************************************************************
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The following platforms or toolchains are deprecated and will be
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removed as of Qt 5.7:
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* Apple OS X 10.7 (Lion)
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* GNU Compiler Collection (GCC) versions 4.6 and earlier
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* Microsoft Visual Studio compiler versions 2008, 2010 and 2012
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* Microsoft Windows XP, Windows Vista
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* Microsoft Windows Embedded Compact 7
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* Microsoft Windows Embedded Compact 2013
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Deprecated platforms and toolchains continue to work until removed.
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- The QtScript module is deprecated and will be removed from Qt's binary
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packages starting with version 5.7. The 5.6 releases of QtScript
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should continue to work along with Qt 5.7 and future versions.
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****************************************************************************
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* Future Direction Notice *
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****************************************************************************
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- In Qt 6, QCoreApplication::notify() will not be called for events being
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delivered to objects outside the main thread. The reason for that is
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that the main application object may begin destruction while those
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threads are still delivering events, which is undefined behavior.
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Applications that currently override notify() and use that function
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outside the main thread are advised to find other solutions in the mean
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time.
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- Qt 5.7 will begin requiring certain C++11 features in order to
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compile. The minimum compiler versions for that release will be:
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* Clang 3.4 (included in XCode 5.1)
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* GCC 4.7
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* Intel C++ Composer XE 2013 SP1 (compiler version 14.0)
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* Microsoft Visual Studio 2013 (compiler version 19.0)
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****************************************************************************
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* Important Behavior Changes *
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****************************************************************************
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- SecureTransport is the default SSL backend on OS X. Use the
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-no-securetransport configure option to use OpenSSL.
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- [QTBUG-34611] Arrow indicator is now consistent with platform styles
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- QtDBus now uses threads to implement processing of incoming and outgoing
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messages. This solves a number of thread safety issues and fixes an
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architectural problem that would cause all processing to stop if a
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particular thread (usually the main thread) is blocked in any
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operation. On the flip side, application developers need to know that
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modifications to a QDBusConnection may be visible immediately on the
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connection, so they should be done in an order that won't allow for
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incomplete states to be observed (for example, register all objects
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before acquiring service names).
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configure & build system
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------------------------
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- [Unix] Qt's .prl files do not expose private dependencies any more.
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Projects must explicitly name their dependencies.
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- [Windows] Enabling link-time code generation in Qt does not enable
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it in user applications as well any more.
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- [FreeBSD] The "freebsd-clang" mkspec is no longer in the unsupported/
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subdir. If you use scripts to build Qt, you'll need to update them to
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include "-platform freebsd-clang" or remove the -platform argument.
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qmake
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-----
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- qmake now enables C++11 support by default if the compiler supports
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it (unless the compiler defaults to C++14 or a later edition).
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To disable this (not possible with Microsoft Visual Studio), add
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"CONFIG -= c++11" to your .pro file. Note that Qt 5.7 requires C++11
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support, so it is a good idea to ensure your code works with that
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compiler setting.
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- [Windows] The .prl files written by earlier versions of Qt cannot
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be used any more. This will affect you if you depend on 3rd party
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libraries which come with .prl files. Patch up QMAKE_PRL_TARGET to
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contain the complete file name of the library, and replace any
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/LIBPATH: in QMAKE_PRL_LIBS with -L.
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- [Windows] QMake is now a lot stricter about what may appear in LIBS.
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Use -L instead of the Windows-specific /LIBPATH. Put flags other
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than -l and -L into QMAKE_LFLAGS.
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- The library lookup has been simplified. This includes the removal of
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support for the QMAKE_<lib>_SUFFIX variables, and the removal of
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attempts to locate libraries under slightly different names than
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specified.
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- [Unix] QMAKE_POST_LINK steps of static libraries are now required
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to operate on $(TARGET) in $(DESTDIR) instead of $$OUT_PWD.
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This matches the Windows backends.
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- Makespecs must now define QMAKE_{PREFIX,EXTENSION}_{SH,STATIC}LIB.
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Accessibility
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-------------
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- [QTBUG-44479] We now report text attributes correctly on Linux, so
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ORCA+F now works properly in QTextEdit and other text controls.
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Widgets
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-------
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- [QTBUG-1049][QTBUG-2295][QTBUG-4532][QTBUG-18883][QTBUG-35148] The
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tabs for the tabified docks can be moved by the user.
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QtTest
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------
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- [QTBUG-47370] Crash/exception information is now logged to standard
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output on Windows.
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****************************************************************************
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* Library *
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****************************************************************************
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QtCore
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------
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- Types in the Q_PROPERTY macro can now contain commas (for example,
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QMap<Foo, Bar>)
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- Added QVersionNumber.
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- All generic containers (with the exception of QVarLengthArray, but
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including QSharedPointer) destroy the previous state as part of a
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move-assignment. Previously, they would dump it into the
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right-hand-side object. Note that this is only true for the generic
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containers. Other implicitly-shared types, as well as the non-generic
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containers such as QString, QByteArray, etc. still swap the contents with
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the right-hand-side object when move-assigned into, and for performance
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reasons, this does not change in the foreseeable future.
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- All containers (with the exception of QVarLengthArray, but including
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QSharedPointer) are now nothrow_default_constructible,
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nothrow_move_constructible, nothrow_move_assignable, and
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nothrow-swappable.
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- [QTBUG-25919] Added rbegin(), crbegin(), rend(), crend(), and
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reverse_iterator and const_reverse_iterator typedefs to
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QByteArray, QString, QList, QLinkedList, QVector, QVarLengthArray,
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and QSet.
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- [QTBUG-46026] Added the convenience constFirst() and constLast()
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functions to QList and QVector.
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- Added relational operators <, <=, >, >= to QList, QVector, and
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QVarLengthArray if the element type supports operator<.
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- Added qHash() overloads for QList, QVector, QLocale, QMatrix, QTransform,
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QMimeType, QRegExp, QRegularExpression, and QUrlQuery.
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- Unicode data updated to v8.0
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- Logging:
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* QT_LOGGING_RULES now supports multiple rules separated by semicolons
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* Systems with syslog may now pass -syslog to configure to send logging
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output to syslog.
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- QCommandLineParser:
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* [QTBUG-44298] Added support for hiding options from the --help output,
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with QCommandLineOption::setHidden(true).
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* Added parsing mode for options after arguments, to allow treating them
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as more arguments.
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- QDebug:
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* How verbose a single debug output should be can now be fine-tuned by
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setting a verbosity on the debug stream.
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* When streaming QWindow, QScreen, QWidget instances to a debug stream
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that has increased verbosity set, detailed information about
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geometries, states etc. is printed.
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- QDir:
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* Added listSeparator().
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- QHash/QMap:
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* Added key iterators, accessible through keyBegin() and keyEnd().
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- QLatin1String:
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* Added default constructor.
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- QLocale:
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* [QTBUG-4044][QTBUG-3068] The C locale does not use group separators
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to format numbers any more.
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* [QTBUG-49031] Fixed a bug that caused QLocale::textDirection() to
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always return Qt::LeftToRight and QLocale::script() to return
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QLocale::AnyScript for the Windows system locale.
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- QMap:
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* Added const equal_range() overload.
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- QMetaProperty:
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* write() now resets the property if an empty QVariant is given, or set
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a default constructed object if the property is not resettable.
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- QPluginLoader:
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* Fixed the search order of Qt plugins so that paths specified by the
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QT_PLUGIN_PATH environment variable are searched before built-in
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paths.
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- QProcess:
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* [QTBUG-47271] Fixed a bug that caused QProcess to launch a child
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process on Unix even if the directory specified with
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setWorkingDirectory did not exist.
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* Deprecated QProcess::error() signal in favor of the new
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QProcess::errorOccurred() signal.
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- QProcessEnvironment:
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* Fixed a bug in operator== involving different empty states.
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- QSet:
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* Added intersects().
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- QSharedPointer:
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* [QTBUG-49748] Fixed a problem that causes a compilation error
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when constructing a QSharedPointer of a const type that derives
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from QEnableSharedFromThis.
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- QStorageInfo:
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* Added QStorageInfo::blockSize(), which returns the optimal block size
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for transferring data to and from the storage.
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- QString:
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* fromLatin1(), fromAscii(), fromUtf8() and fromLocal8Bit() now return a
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null QString when called with a null QByteArray.
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* Added insert(int, QStringRef), insert(int, const char*), and
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insert(int, QByteArray) overloads.
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* Added prepend(QStringRef) and prepend(const QChar *, int) overloads.
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* resize() no longer shrinks the capacity. That means resize(0) now
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reliably preserves capacity().
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- QStringRef:
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* Added truncate(int).
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- QTemporaryDir:
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* Added errorString() method that returns the string explaining why
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creating the temporary directory failed.
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- QTextStream:
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* Can now stream QStringRef without converting to a QString first.
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- QThread:
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* [QTBUG-49870] Fixed a bug that would cause debug-mode applications to
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live-lock on exit if they had a global static containing a QThread
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that wasn't exited properly.
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- QVariant:
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* [QTBUG-40644] Fixed crash when setting a QVariant of a different type to
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a property of a custom type by attempting to do a conversion instead.
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* [QTBUG-37851] QVariant(QColor)::toString() now uses QColor::HexArgb format
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when the alpha component is different from 1.
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- QVector:
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* [QTBUG-39293] resize() will no longer shrink the capacity. That means
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resize(0) now reliably preserves capacity().
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- QtAlgorithms:
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* Added qFindFirstSetBit() and qFindLastSetBit().
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QtDBus
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------
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- [QTBUG-14131] The QtDBus library now links directly to the libdbus-1
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system library if it was detected at configure time. To force linking to
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the library, pass option -dbus-linked to configure; to force dynamic
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loading at runtime, use -dbus-runtime.
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QtGui
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-----
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- [QTBUG-43674] Linux accessibility (using XCB) works for
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applications launched as root.
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- Added ReturnKeyType enum that emulates the native return key press on
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different mobile platforms, to indicate actions such as search, move to
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next field, and so on.
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- Painting:
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* Internal precision of solids and gradients is up to 16bit per color.
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- QFont:
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* [QTBUG-15214] QFont now serializes the capitalization setting.
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- QGuiApplication:
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* [QTBUG-47690] Fixed a regression where both sessionId and sessionKey were
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empty on Windows.
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- QIcon:
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* [QTBUG-42109] Added the ability for QIcons to be marked as template images.
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This allows end users to create QSystemTrayIcons that are properly
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displayed as monochrome images on OS X, which is especially important
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on Yosemite and above when Dark Mode is turned on.
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- QKeySequence:
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* Added qHash(QKeySequence).
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- QTextLayout:
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* Added QVector-based alternatives setFormat(), format(), and
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clearFormat() to setAdditionalFormats(), additionalFormats(), and
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clearAdditionalFormats(), resp.
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* [QTBUG-41197] Fixed an uncommon rendering error with fonts containing
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overlapping contours.
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* [QTBUG-47547] Fixed some instances of missing glyphs when drawing large
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fonts.
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* [QTBUG-47547] Fixed problem where fallback fonts for text with certain
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styles would be reported as unscalable.
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* Freetype:
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* [QTBUG-45963] Fixed a divide-by-zero exception when accessing bitmap
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fonts.
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* [QTBUG-50715] QTextLayout::glyphRuns() now returns united bounding
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rects for glyph runs that are merged.
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- OpenGL:
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* [QTBUG-46161] Added QOpenGLExtraFunctions providing OpenGL ES 3.0 and
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3.1 function wrappers in a cross-platform manner.
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* [QTBUG-39235] Added support for multiple render targets in
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QOpenGLFramebufferObject.
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* [QTBUG-42444] Made QInputMethod's visible more accurate.
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QtNetwork
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---------
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- QSslServer:
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* In an SSL connection, the client socket now uses the server's cipher
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preferences by default. This can be disabled using the QSslConfiguration.
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- QUdpSocket:
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* [QTBUG-47011] Fixed a bug that caused the QAbstractSocket::ShareAddress
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option not to work on Linux.
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QtPlatformSupport
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-----------------
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- QKdeTheme:
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* Added support for KDE Plasma 5, which is also the default theme now.
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QtSql
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-----
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- [QTBUG-3500] SSL support for MySQL database connections has been added.
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Option CLIENT_SSL replaced by SSL_KEY, SSL_CERT, SSL_CA, SSL_CAPATH and
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SSL_CIPHER, so that the keys, certificates and cipher can be specified.
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- Improved performance when reading integer values from MySQL databases via
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prepared statements.
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QtTest
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||
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------
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||
|
|
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||
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- [QTBUG-47370] A stack trace is output on standard error if a test
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||
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crashes.
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||
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- Added macros QTRY_VERIFY2_WITH_TIMEOUT() and QTRY_VERIFY2(), making it
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possible to output a message after the timeout has expired.
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||
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QtWidgets
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---------
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- QComboBox:
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* QComboBox::setView() no longer deletes the old view directly. It now
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|
|
checks the ownership first.
|
||
|
|
|
||
|
|
- QListView:
|
||
|
|
* [QTBUG-37007] Horizontal scrolling with a vertical mouse wheel
|
||
|
|
is now possible.
|
||
|
|
|
||
|
|
- QMainWindow:
|
||
|
|
* Added GroupedDragging as a DockOption which allow users to drag all
|
||
|
|
the tabs together when dragging the title of a QDockWidget which is
|
||
|
|
tabbed with others.
|
||
|
|
|
||
|
|
- QSizePolicy:
|
||
|
|
* Added qHash(QSizePolicy).
|
||
|
|
|
||
|
|
- QTabBar:
|
||
|
|
* [QTBUG-45173][QTBUG-15128] Fixed moving tab when a stylesheet is
|
||
|
|
applied.
|
||
|
|
|
||
|
|
- QFontDialog:
|
||
|
|
* Added supportedSchemes property.
|
||
|
|
|
||
|
|
****************************************************************************
|
||
|
|
* Platform-specific Changes *
|
||
|
|
****************************************************************************
|
||
|
|
|
||
|
|
Android
|
||
|
|
-------
|
||
|
|
|
||
|
|
- [QTBUG-38379] Stylus devices such as S Pen will generate QTabletEvents now.
|
||
|
|
- [QTBUG-40731] Implemented QInputMethod::keyboardRectangle.
|
||
|
|
- [QTBUG-45585] Fixed the opening of a local file using
|
||
|
|
QDesktopServices::openUrl().
|
||
|
|
|
||
|
|
Windows
|
||
|
|
-------
|
||
|
|
|
||
|
|
- [QTBUG-41309][QTBUG-41883][QTBUG-42410] Add a function to
|
||
|
|
QWindowsWindowFunctions to enable working around a limitation with
|
||
|
|
showing other top level windows while showing a fullscreen OpenGL-based
|
||
|
|
window.
|
||
|
|
- DirectWrite support is now the default if available.
|
||
|
|
|
||
|
|
- DirectWrite:
|
||
|
|
* [QTBUG-48546] Added differentiation between vertical hinting and no
|
||
|
|
hinting in DirectWrite font engine.
|
||
|
|
* [QTBUG-49562] Fixed clipping bug when rendering unhinted text with
|
||
|
|
grayscale antialiasing.
|
||
|
|
* [QTBUG-49562] Added transformation support to DirectWrite engine when
|
||
|
|
using grayscale antialiasing.
|
||
|
|
* [QTBUG-50009] Fixed transformed text when using the DirectWrite font
|
||
|
|
engine.
|
||
|
|
|
||
|
|
- Text:
|
||
|
|
* [QTBUG-47141] Made it possible to disable antialiasing for text when
|
||
|
|
drawing into images.
|
||
|
|
* [QTBUG-48546] Fixed uneven kerning for some fonts.
|
||
|
|
|
||
|
|
X11/XCB
|
||
|
|
-------
|
||
|
|
|
||
|
|
- [QTBUG-42985] In case there are no physical screens attached,
|
||
|
|
QGuiApplication::screens() and QGuiApplication::primaryScreen() will
|
||
|
|
now return a placeholder QScreen object.
|
||
|
|
- [QTBUG-49071] Fixed focusIn event on hide/show being not delivered.
|
||
|
|
- Harmonized input context selection. QT_IM_MODULE environment variable
|
||
|
|
is taken into account now.
|
||
|
|
|
||
|
|
QPA
|
||
|
|
---
|
||
|
|
|
||
|
|
- EGLFS/KMS:
|
||
|
|
* It is now possible to set the DPMS mode and get the current value for
|
||
|
|
each screen.
|
||
|
|
|
||
|
|
- WinRT:
|
||
|
|
* Windows Store apps are now composited inside a XAML container,
|
||
|
|
allowing for tighter integration with the native UI layer.
|
||
|
|
* Application status bar is visible by default now.
|
||
|
|
|
||
|
|
****************************************************************************
|
||
|
|
* Tools *
|
||
|
|
****************************************************************************
|
||
|
|
|
||
|
|
configure & build system
|
||
|
|
------------------------
|
||
|
|
|
||
|
|
- Qt's build system now detects whether the compiler supports C++14 and
|
||
|
|
experimental support for C++1z. If the compiler supports it, Qt is
|
||
|
|
compiled using that. This does not apply to user applications built
|
||
|
|
using qmake: those are still built with C++11 support only. To build
|
||
|
|
your application with C++14 support, add "CONFIG += c++14"
|
||
|
|
(similarly for C++1z) to your .pro file.
|
||
|
|
- [GCC][ELF] The Qt libraries now contain ELF versions.
|
||
|
|
- [QTBUG-48958][OS X] Configure with -no-rpath now yields dynamic Qt
|
||
|
|
libraries and frameworks with an absolute install name (based in
|
||
|
|
-libdir). This restores Qt 4 behavior.
|
||
|
|
- [MinGW] Fixed detection of DirectWrite.
|
||
|
|
- [iOS] The build process was significantly changed in several ways.
|
||
|
|
This doesn't matter unless you're doing Something Very Special.
|
||
|
|
- [Unix] -force-pkg-config is now just an alias for -pkg-config.
|
||
|
|
- [QTBUG-47840] Fixed pointer size detection when cross-building.
|
||
|
|
- [QTBUG-47920] GStreamer 1.0 is now preferred over 0.10.
|
||
|
|
- [QTBUG-48041][WinRT] Fixed -no-opengl not bailing out despite the
|
||
|
|
configuration causing a build error later on.
|
||
|
|
- [Linux] Qt is now built with relative rpaths, as was already the
|
||
|
|
case on OS X.
|
||
|
|
- [Windows] Configure now supports the -verbose option, like on Unix.
|
||
|
|
- [Unix] Added configure option to enable link-time code generation.
|
||
|
|
- Introduced the -optimized-tools option; supersedes -optimized-qmake.
|
||
|
|
Tools are by default not optimized in debug builds any more.
|
||
|
|
- Non-prefix builds don't have install targets any more.
|
||
|
|
|
||
|
|
qmake
|
||
|
|
-----
|
||
|
|
|
||
|
|
- By default, GNU extensions are now enabled with Clang, GCC, and ICC
|
||
|
|
even in C++11 and C++14 modes. To disable the GNU extensions, add
|
||
|
|
CONFIG+=strict_c++ to your .pro file.
|
||
|
|
- In addition to .qrc files, it is now possible to list standalone files
|
||
|
|
and directories, and collections of files in RESOURCES.
|
||
|
|
- [QTBUG-17533] Fixed dependency scan being confused by directly adjacent
|
||
|
|
string literals without intermediate whitespace. The parser also got more
|
||
|
|
C++ compliant and now understands C++11 raw strings.
|
||
|
|
- [QTBUG-21854] Deprecated DEPLOYMENT in favor of INSTALLS.
|
||
|
|
- [QTBUG-30813] Makefile output no longer contains implicit suffix rules,
|
||
|
|
as all sources are built using explicit rules.
|
||
|
|
- [QTBUG-36575] Fixed handling of QMAKE_OBJECTIVE_CFLAGS for Objective-C
|
||
|
|
(as opposed to Objective-C++). OBJECTIVE_SOURCES was obsoleted; use just
|
||
|
|
SOURCES. This behavior matches Xcode.
|
||
|
|
- [QTBUG-44184][Windows] Added RC_DEFINES to allow overriding DEFINES.
|
||
|
|
This is a workaround for incompatible quoting requirements of rc.exe
|
||
|
|
compared to cl.exe.
|
||
|
|
- [QTBUG-46910][Unix] Fixed infinite recursion with link_prl (the default)
|
||
|
|
and .la files in a .libs/ subdirectory.
|
||
|
|
- [QTBUG-47951] Fixed QMAKE_CXX/CROSS_COMPILE verification with ccache.
|
||
|
|
- [QTBUG-48287][Unix] Fixed race in debug_and_release builds of static libs.
|
||
|
|
- [QTBUG-48648][VS2013] Fixed creation of empty (and thus invalid)
|
||
|
|
<Dependencies> sections in manifest files.
|
||
|
|
- [QTBUG-49665][VS] Fixed shadow builds of subdirs projects.
|
||
|
|
- [QTBUG-50442][VS] Added support for precompiled headers without (or with
|
||
|
|
an uncommon) file extension.
|
||
|
|
- 'make check' targets will now extend QT_PLUGIN_PATH instead of
|
||
|
|
overwriting it.
|
||
|
|
- Fixed support for certain versions of (f)lex and yacc.
|
||
|
|
- [Darwin] Info.plist is now correctly placed also in plugin bundles.
|
||
|
|
- [Darwin] CONFIG+=plugin_bundle now actually creates Mach-O bundles.
|
||
|
|
- [Unix] Added support for paths relative to the target in QMAKE_RPATHDIR.
|
||
|
|
- [Unix] Support for CONFIG+=compile_libtool was removed. Use
|
||
|
|
CONFIG+=create_libtool and/or custom compilers instead.
|
||
|
|
- [Windows] Libraries coming with .prl files can now have non-standard file
|
||
|
|
extensions and a major version of zero.
|
||
|
|
- [WEC2013][VS] Fixed support for VS2013 SDKs.
|
||
|
|
- [MSys] Added workaround for MinGW-make's magic handling of paths.
|
||
|
|
Prepend @msyshack@ to INSTALL_ROOT to prevent MSys root prefixing.
|