125 lines
5.2 KiB
Groff
125 lines
5.2 KiB
Groff
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Qt 5.4.2 is a bug-fix release. It maintains both forward and backward
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compatibility (source and binary) with Qt 5.4.1. Compatibility with Qt
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5.4.0 is also retained, except on Windows when using MSVC 2012 or MSVC
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2013. See note below.
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For more details, refer to the online documentation included in this
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distribution. The documentation is also available online:
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http://doc.qt.io/qt-5.4/
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The Qt version 5.4 series is binary compatible with the 5.3.x series.
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Applications compiled for 5.3 will continue to run with 5.4 with the
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exception of on Windows when using MSVC 2012 or MSVC 2013. See note
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below.
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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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* Important Behavior Changes *
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****************************************************************************
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- Restored binary compatibility with Qt 5.3.2 on Windows when using MSVC
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2012 or MSVC 2013. This means that Qt 5.4.1 and 5.4.2 are no longer
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binary compatible with Qt 5.4.0 when using either of those compilers.
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- [QTBUG-42594] OS X binary package: fixed incorrect linking to libraries in
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/opt/local/lib
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- EXIF orientation is no longer applied to JPEG images on read. EXIF
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orientation on JPEG was introduced in 5.4.0, but due to a bug the most
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common EXIF-format (big-endian) was not working until 5.4.1. 5.4.2 restores the
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behavior of 5.4.0 and earlier for most EXIF-tagged JPEGs.
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EXIF orientation will be an opt-in starting with Qt 5.5.
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- On x86 and x86-64 systems with ELF binaries (especially Linux), due to
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a new optimization in GCC 5.x in combination with a recent version of
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GNU binutils, compiling Qt applications with -fPIE is no longer
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enough with GCC 5.x. Applications now need to be compiled with
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the -fPIC option if Qt's option "reduce relocations" is active. For
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backward compatibility only, Qt accepts the use of -fPIE for GCC 4.x
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versions.
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Note that Clang is known to generate incompatible code even with -fPIC if
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the -flto option is active.
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Applications using qmake or cmake >= 2.8.12 as their build system will
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adapt automatically. Applications using an older release of cmake in
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combination with GCC 5.x need to change their CMakeLists.txt to add
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Qt5Core_EXECUTABLE_COMPILE_FLAGS to CMAKE_CXX_FLAGS. In particular,
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applications using cmake >= 2.8.9 and < 2.8.11 will continue to build
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with the -fPIE option and invoke the special compatibility mode if using
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GCC 4.x.
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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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- [QTBUG-43893] Fixed memory leak in qSetMessagePattern
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- [QTBUG-43513] QXmlStreamReader: Correctly parse XML containing NUL bytes
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in the input stream
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- [QTBUG-43352] QTemporaryDirectory: Properly clean up in case of a failure
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- [QTBUG-43827] Fixed regression in QSortFilterProxyModel which crashed when
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sorting a tree model
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QtGui
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-----
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- [QTBUG-44273] Fixed misplacement of outlined text with native text rendering
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- [QTBUG-44147] Fixed VNC not working on some VNC servers
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- [QTBUG-43850] Fixed crash with multi-threaded font usage
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- [QTBUG-43850] Made the old harfbuzz fallback available at runtime
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- Improvements to the experimental high-dpi support
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- [QTBUG-43318] Better resolution of GLES 3 functions to avoid issues when
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deploying on systems with GLES 2.0 only
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QtWidgets
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---------
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- [QTBUG-43830] Fixed crash in stylesheets when styling QProgressBar
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- [QTBUG-43663] QColorDialog: Don't lose focus while color picking
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QtNetwork
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---------
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- [QTBUG-43793] Fixed disconnects of QSSLSocket after starting encryption
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QtPrintSupport
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--------------
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- [QTBUG-43124] Fixed QPrinter::{width,height} return values
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****************************************************************************
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* Platform Specific Changes *
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****************************************************************************
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Android
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-------
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- [QTBUG-44648] Fixed rendering Chinese text on Android 5
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Linux/XCB
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---------
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- [QTBUG-45071] Don't crash when resizing windows to bigger than 3840x2160
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****************************************************************************
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* Tools *
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****************************************************************************
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configure & build system
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------------------------
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- CMake-based projects using Qt will now always be built with -fPIE,
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which fixes function pointer based QObject::connect() on ARM. This
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is consistent with qmake
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- [Android] Fixed compilation on armv5 with 4.9 toolchain
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qmake
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-----
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- [VS] Fixed handling of files that are excluded from build
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- [QTBUG-44413][VS] Fixed vcxproj generation for CONFIG-=flat, again
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- [QTBUG-44595] Restored Qt 4 behavior of qtLibraryTarget()
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- [QTBUG-45118][Windows] Fixed parallel build when using TYPELIBS
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- [OS X/iOS] Fixed QMAKE_INFO_PLIST path resolution for shadow builds
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