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diff --git a/doc/src/platform-notes-rtos.qdoc b/doc/src/platform-notes-rtos.qdoc new file mode 100644 index 000000000..8a52d84fb --- /dev/null +++ b/doc/src/platform-notes-rtos.qdoc @@ -0,0 +1,220 @@ +/*! + \page platform-notes-vxworks.html + \title Platform Notes - VxWorks + \contentspage Platform Notes + \target VxWorks + + \note VxWorks is a community supported platform. See the + \l{Supported Platforms} page for more information. + + This page contains information about the Qt for VxWorks port. More + information about the combinations of platforms and compilers supported + by Qt can be found on the \l{Supported Platforms} page. + + \tableofcontents + + \section1 Supported Versions + + Qt has been tested on WindRiver VxWorks 6.7 in kernel mode using the + vendor supplied GCC compiler, targetting both the x86 simulator + (simpentium) and Power-PC devices (ppc). + VxWorks' RTP mode is currently not supported. + + \section1 Limitations + + The VxWorks kernel has an optional POSIX compatibility layer, but this + layer does not implement all POSIX functionality needed for a complete + Qt port. + + \table + \header \o Function \o Notes + \row \o QProcess + \o Not available - VxWorks has no concept of processes. + \row \o QSharedMemory + \o Not available - VxWorks has only a global, flat address space. + \row \o QSystemSemaphore + \o Not available - VxWorks has no concept of processes. + \row \o QLibrary + \o QLibrary is only a small stub to make it possible to build + static plugins. + \row \o QCoreApplication + \o Can only be instantiated once. Qt's Q(CoreE)Application is + tightly coupled to one address space and process, while VxWorks + only supports one global address space and has no concept of + processes. + \row \o Phonon + \o There is no standard audio backend, which could be integrated into Phonon. + \row \o Qt3Support + \o The Qt3Support library is not available on QNX. + + \endtable + + \section1 Build Instructions + + Qt for VxWorks needs to be \l{Cross-Compiling Qt for Embedded Linux + Applications}{cross-compiled} on a Linux host. \c configure and \c make + the build like you would with a standard \l{Cross-Compiling Qt for + Embedded Linux Applications}{embedded Linux cross build}. Building the + VxWorks simulator would be done like this: + + \code + <path/to/qt/sources>/configure -xplatform unsupported/vxworks-simpentium-g++ -embedded vxworks -exceptions -no-gfx-linuxfb -no-mouse-linuxtp -no-mouse-pc -no-kbd-tty + make + \endcode + + \list + \o \c{-xplatform unsupported/qws/vxworks-simpentium-g++} - selects the x86 simulator mkspec for VxWorks + \o \c{-embedded vxworks} - builds the embedded version of Qt and sets the architecture to VxWorks + \o \c{-exceptions} - see General Notes below + \o \c{-no-gfx-linuxfb}, \c{-no-mouse-linuxtp}, \c{-no-mouse-pc} and \c{-no-kbd-tty} are Linux specific and won't work on VxWorks + \endlist + + \section1 General Notes + + \list + + \o Configuring with \c{-exceptions} is necessary, because the VxWorks + 6.7 g++ headers require exceptions to be enabled when compiling C++ + code. + + \o Configure's \c{-xplatform} can be any of + \c{unsupported/vxworks-(simpentium|ppc)-(g++|dcc)}, but \c{dcc} + (WindRiver DIAB compiler) has not yet tested been tested with Qt 4.6 and + VxWorks 6.7. + + \o Building shared libraries with \c{-shared} (the default) doesn't + really build shared libraries, like e.g. on Linux, since these are not + supported by VxWorks. Instead, qmake will created partially linked + objects, that can be loaded at runtime with \c{ld}. + + \o Creating static builds with \c{-static} is fully supported. + + \o "Munching" (generating constructors/destructors for static C++ + objects) is done automatically by a special qmake extension (for both + shared libraries and executables) + + \o VxWorks does not have a file system layer, but the low level storage + drivers have to supply a file system like interface to the applications. + Since each driver implements a different subset of the functionality + supported by this interface, Qt's file system auto-tests show wildly + differing results running on different "file systems". The best results + can be achieved when running on a (writable) NFS mount, since that + provides the most Unix-ish interface. The worst results come from the + FTP file system driver, which may crash when accessed by a + \c{QFileInfo}. + + \o Keep in mind that VxWorks doesn't call your \c{main()} function with + the standard \c{argc}/\c{argv} parameters. So either add a special + \c{vxmain()} function or use a tool like \c{callmain} to translate + VxWorks' commandline arguments to an \c{argc}/\c{argv} array. + + \o Some example will fail to build, due to some missing dependencies + (e.g. shared memory) - this will be fixed in a later release. + + \endlist +*/ + +/*! + \page platform-notes-qnx.html + \title Platform Notes - QNX + \contentspage Platform Notes + \target QNX + + \note QNX is a community supported platform. See the + \l{Supported Platforms} page for more information. + + This page contains information about the Qt for QNX port. More + information about the combinations of platforms and compilers supported + by Qt can be found on the \l{Supported Platforms} page. + + Note that Qt for QNX is currently based on \l{Qt for Embedded Linux}, which + contains its own windowing system. Mixing QNX's Photon environment with + Qt for QNX is currently not possible. Building Qt for QNX with Photon's + X11 embedded server is not recommended due to missing support for X11 extensions, + resulting in poor rendering quality. + + Qt for QNX contains experimental screen and input drivers based on QNX's + \c devi-hid and \c io-display. For more information, check the class documentation + for QQnxScreen, QWSQnxKeyboardHandler and QQnxMouseHandler. See the + \l{Porting Qt for Embedded Linux to a New Architecture} document for information + on how to add custom screen or input drivers. + + \tableofcontents + + \section1 Supported Versions + + Qt has been tested on QNX 6.4 on i386 and PowerPC targets with QNX's default + gcc compiler. + + \section1 Limitations + + Some of Qt's functionality is currently not available on QNX: + + \table + \header \o Function \o Notes + \row \o QProcess + \o Not available - QNX doesn't support mixing threads and processes. + \row \o QSharedMemory + \o Not available - QNX doesn't support SYSV style shared memory. + \row \o QSystemSemaphore + \o Not available - QNX doesn't support SYSV style system semaphores. + \row \o QWS Multi Process + \o QT_NO_QWS_MULTIPROCESS is always on due to missing shared memory support. + \row \o Phonon + \o There is no standard audio backend, which could be integrated into Phonon. + \row \o Qt3Support + \o The Qt3Support library is not available on QNX. + \endtable + + \section1 Build Instructions + + Qt for QNX needs to be built either on a QNX system, or \l{Cross-Compiling Qt + for Embedded Linux Applications}{cross-compiled} on a Linux host. In either + case, The QNX Software Development Platform must be installed. + + Example configure line for cross-compiling Qt for QNX on a Linux host for an + i386 QNX target: + + \code + configure -xplatform unsupported/qws/qnx-i386-g++ -embedded i386 -no-gfx-linuxfb -no-mouse-linuxtp -no-kbd-tty -no-qt3support -qt-gfx-qnx -qt-mouse-qnx -qt-kbd-qnx -no-exceptions + \endcode + + \list + \o \c{-xplatform unsupported/qws/qnx-i386-g++} - selects the i386-g++ mkspec for QNX + \o \c{-embedded i386} - builds the embedded version of Qt and sets the architecture to i386 + \o \c{-no-gfx-linuxfb}, \c{-no-mouse-linuxtp} and \c{-no-kbd-tty} are Linux specific and won't work on QNX + \o \c{-no-qt3support} - required since the Qt3 support classes are not supported on QNX + \o \c{-no-exceptions} - reduces the size of the library by disabling exception support + \o \c{-qt-gfx-qnx} - enables the experimental \c{io-graphics} based display driver + \o \c{-qt-mouse-qnx} - enables the experimental \c{devi-hig} based mouse driver + \o \c{-qt-kbd-qnx} - enables the experimental \c{devi-hig} based keyboard driver + \endlist + + \section1 General Notes + + \list + \o To enable the experimental QNX display and input drivers, \c{io-display} needs to be + up and running. The \c devi-hid based Qt input drivers require \c devi-hid to run + in resource mode without Photon support. To enable a standard mouse and keyboard + combination, run \c devi-hid as follows: \c{/usr/photon/bin/devi-hid -Pr kbd mouse}. + Note that your current shell will not accept keyboard and mouse input anymore after + running that command, so run it either from a script that launches a Qt application + afterwards, or make sure to have remote login available to launch a Qt application. + In addition, the \c QWS_DISPLAY, \c QWS_MOUSE_PROTO and \c QWS_KEYBOARD environment + variables should all be set to \c{qnx} before running a Qt application. + + \o The 3rd party TIFF library currently doesn't build due to the missing \c inflateSync + symbol from QNX's \c{libz.so.2}. Workarounds would be to manually replace QNX's libz + with a newer version, or disable the TIFF plugin entierly by appending + \c{QT_CONFIG += no-tiff} to \c{.qmake.cache} after configuring Qt. + + \o Some of the tools, examples and demos do not compile due to dependencies on QProcess + or other classes that are not available on QNX. + \endlist + + \section1 Platform Regressions + + Qt for QNX's behavior is mostly identical with \l{Qt for Embedded Linux}. However, + some regressions were spotted in QDateTime computation around year 0 and year 1970, + which have been tracked back to faulty time zone data on some QNX versions. +*/ |