source: trunk/README.OS2@ 296

This is Beta 3 of Qt version 4.5.1 for OS/2 and eCS.

This document contains a brief information on the OS/2 version of the Qt library
plus a brief list of OS/2-specific changes from release to release (section
CHANGES below). Please visit the project page at

  http://svn.netlabs.org/qt4/wiki

to get more information and the latest news and also to report bugs.



REQUIREMENTS

In order to compile the Qt library, you will need the following tools:

  - One of the OS/2 Warp 4, OS/2 Warp 4.5 or eComStation operating systems.

  - InnoTek GCC compiler version 3.3.5 CSD3 or above (not tested).
    You can download a copy of the compiler using the following link:

      ftp://ftp.netlabs.org/pub/gcc/GCC-3.3.5-csd3.zip

  - Patched OpenWatcom linker which you can download from here:

      ftp://ftp.netlabs.org/pub/gcc/wl-hll-r1.zip

    Note that if you use IBM ILINK (no matter what version), you will
    not be able to build the debug version of the library due to
    bugs/limitations of ILINK.

  - GNU Make 3.81beta1 or above (not tested) available at:

      http://unix.os2site.com/pub/binary/make/make-3_81beta1-bin-static.zip

After unpacking the GCC archive, you will have to set up the compiler
environment by invoking gccenv.cmd from the bin subdirectory with the
correct arguments (type gccenv.cmd -? for help). For the OpenWatcom
linker, specify WLINK as the second argument.

You will also need to perform the following steps:

  - Make sure the selected linker and the make utility are in PATH.

  - Make sure CMD.EXE is your command line processor (the generated makefiles
    will rely on its 'copy', 'if' and other commands). If you have a Unix shell
    (SH.EXE) in your environment, you may need to force GNU make to use CMD.EXE
    by doing 'set MAKESHELL=C:\OS2\CMD.EXE' where C: is your boot drive.

  - set LIBRARY_PATH=C:\OS2\DLL;C:\MPTN\DLL where C: is your boot drive.

  - Make sure that there are no traces of any other Watcom or OpenWatcom
    installation in the environment where you build Qt as it will most likely
    interfere with the patched OpenWatcom linker we use. This basically means
    removing all *WATCOM* environment variables and removing references to those
    Watcom installations from PATH.

Note that the QTDIR environment variable used by previous Qt versions is not
used by Qt4 anymore (except two rare cases that do not affect the OS/2 platform
anyway and are probably leftovers after the migration of the qmake feature
specifications to Qt4). Therefore, there is no need to set this variable
explicitly. See also a note below about hard-coded paths to the source tree.

There is also no need to set the QMAKESPEC variable explicitly. If it is absent,
qmake will use the specification stored in the <Qt4_Home>/mkspecs/default
directory, which on OS/2 always refers to the "os2-g++" specification, the only
one supported at the present time.

When the environment is set up, go to the directory where you unpacked the
Qt4 source tree and type:

  configure.cmd

This will set up the library (by creating necessary configuration and include
files and a bunch of Makefiles for variuos components) and build the qmake
utility.

The next step is to go to the src subdirectory and type:

  make

This will compile and link the library. Note that by default both the release
and the debug version of the library are built (please be patient, it may take
quite some time depending on your hardware). The release and debug libraries can
co-exist in the same source tree and may be used in parallel: all the debug DLLs
get a 'd' letter in their name preceeding the Qt major version number and use
separate directories for object files.

To save time, you may also build the release and the debug versions of the
library separately by typing 'make release' or 'make debug' accordingly
instead of just 'make'.

Once the library is successfully built, you may try to compile the demos
and examples by visiting the individual example subdirectories in the source
tree and typing 'qmake' followed by one of 'make', 'make release' or
'make debug' in that subdirectory.

NOTE:

  Please keep in mind that due to dropping the QTDIR variable recognition,
  qmake.exe now unconditionally uses hard-coded paths to locate various Qt4
  components (such as the include or source directory) during the makefile
  generation process and therefore if you move the Qt source tree to another
  location you will need to run configure.cmd again in order to update these
  hard-coded paths and rebuild qmake and other dependent parts of the library.



CURRENT LIMITATIONS

  1. configure.cmd is not yet capable to generate individual Makefiles for demos
     and examples, it only generates the main Makefile that builds the library
     and the necessary tools. Demos and examples can be compiled by hand
     (as described above).

  2. OS/2 bitmap fonts are not yet supported. Use TTF or Type1 (PFB) fonts with
     Qt.

  3. Make sure you have the LANG environment variable properly set. The format
     is 'set LANG=ll_CC[.encoding]' where <ll> is the language code, <CC> is the
     country code and <encoding> is the optional encoding to use. If LANG is
     missing or invalid, string conversion operations may work incorrectly
     resulting in distorted text input or output. Note that for most languages
     you will have to specify the encoding number explicitly because Qt and OS/2
     usually disagree about the default encoding for the given language.

     To specify the correct encoding for Qt you need to know your system code
     page number. You can find this number in the COUNTRY statement of your
     CONFIG.SYS. Note however that the code page number from CONFIG.SYS and the
     encoding name you specify in LANG are different things. Qt doesn't
     understand IBM code page numbers directly. In most cases, you can get the
     encoding name by prepending 'cp' to the code page number (for example,
     'cp850' for code page 850) but sometimes this will not work because not all
     encodings have 'cp'-like aliases. In this case, you should google around to
     find the correct encoding name for your code page number. Here is a couple
     of examples of the proper LANG specification:

       set LANG=de_DE.cp850             - for the German OS/2 locale
       set LANG=ru_RU.cp866             - for the Russian OS/2 locale

     Later, the correct encoding for the system code page will be detected
     automatically and specifying it in LANG will not be necessary.

  4. Some functionality of the already available Qt classes may be limited or
     unimplemented. If you find such a case and there is no ticket for it
     in the bug tracker, feel free to add one.

  5. No qt3support module. This functionality is rarely necessary in mature
     real life applications and has low priority.

  6. No native PM style, but Qt will use fonts and colors from the current
     OS/2 theme (hint: if your default OS/2 font is "WarpSans", install the
     "Workplace Sans" TTF font from Alex Taylor to get more native look & feel).
     Note that v0.5 of the font has known sizing and spacing problems and also
     supports only the Latin1 code page. To avoid these problems, use v0.4 which
     you can download here:

       http://users.socis.ca/~ataylo00/creative/fonts/wpsu_ttf_04.zip

  7. QProcess: when starting PM applications from text-mode applications and
     when detaching applications with startDetached(), the returned PID is a
     PID of the intermediate cmd.exe process, not the target application.

  8. No QDesigner, no QAssistant.

  9. No Drag&Drop, no printer support, no sound. See the project roadmap for
     more information on the progress and current limitations:

       http://svn.netlabs.org/qt4/roadmap



CHANGES

Beta 3 (17-10-2009)

  Improvements:

  - Added proper font support. All outline (scalable) fonts visible in the Font
    Palette should be now recognized by Qt. The fonts are hinted and antialiased
    using the Freetype2 library when drawing text.

  - System fonts and colors are now used by default for Qt widgets.

  - configure.cmd now generates the main Makefile to simplify building of Qt.

  - corelib: QProcess: Implemented child termination detection.

  - corelib: QProcess: Implemented redirection to another QProcess.

  - corelib: QProcess now uses native pipes for stream redirection. This fixes
    various issues like 'Socket operation on non-socket' errors during
    parent-child communication.

  - corelib: QProcess: Make sure that the directory containing the executable
    file is always searched (first) for DLLs needed by this executable. This
    makes it unnecessary to change the current directory to the executable's
    directory or add it to LIBPATH before starting the Qt application.

  - corelib: QProcess can now start applications of different type (e.g. PM
    applications from text-mode applications) directly.
    QProcess::startDetached() also works.

  - qmake: In debug_and_release mode, 'release-(all|clean|distclean|install|
    uninstall)' and 'debug-(all|clean|distclean|install|uninstall)' make
    targets are now available.

  Fixes:

  - Doing 'make clean' could result into a hang due to CMD.EXE command line
    length limitation.

  - corelib: Fixed: QProcess: Lost data during stream redirection.

  - corelib: QSettings could sometimes distort data when saving it to the
    registry (by replacing some characters with codes 0x80 and above with '?').

Beta 2 (17-09-2009)

  Improvements:

  - Ported the network module (QtNetwork4.dll) and added to the default build.

  - Added modules sql, svg, xmlpatterns, scripttools, plugins to the default
    build.

  - gui: Added recognition of dead keys which makes it possible to type
    umlauts and other accented characters that require composition.

  - gui: Implemented standard cursor shapes in Qt applications.

  Fixes:

  - qmake: Fixed the trailing slash problem which caused qmake to generate
    incorrect makefiles and fail to build the Qt library on some platforms.

  - configure.cmd: Return to the root source tree directory after building
    qmake.

  - qmake: Automatically use different link flags when linking qmake with WLINK.

  - qmake: Recognize TARGET_SHORT that allows to specify a short DLL name
    (vital for OS/2 which reqires DLL names to be in 8x3 format).

  - build: Set short DLL names for Qt modules on OS/2 using TARGET_SHORT.

  - corelib: Various fixes to file system classes that deal with the file name
    case (which should be ignored on OS/2) and forward and back slashes.

  - corelib: Fixed: QMutex could let more than one thread access the protected
    resource.

  - corelib: Standard stream redirection in QProcess should now work for
    kLIBC-based child processes. Redirection for all other applications
    (such as CMD.EXE) will be added later (seems to be a kLIBC bug/feature).

  - gui: Fixed erroneous QFileDialog behavior (duplicate entires in the list,
    incomplete contents of the root directory of the current drive).

  - gui: Fixed: Ctrl+A..Z should generate characters with codes 0x01-0x1F.

  - gui: Fixed: Close popups when resizing/moving the top level window.

  - gui: Enabled actual enforcing min/max Qt widget constraints for top-level windows.

  - gui: Fixed child widget duplication when resizing top level widgets after
    showing a popup; moving native child widgets should now work correctly.
    This also fixed a number of redraw problems (for example, drawing the main
    menu and tool bars in smplayer, moving tool bars around in other
    applications such as textedit from the demo folder).

Beta 1 (29-08-2009)

  - First public release.



CREDITS

Dmitry A. Kuminov (development)
Silvan Scherrer (management)

netlabs.org (hosting & support)

Nokia Corporation (original Qt library)

We also want to THANK all individuals and organizations who made the donations
to this project and helped to make it happen. Please visit

  http://qt.netlabs.org/en/site/index.xml

to get the full list of sponsors and to find information on how you can support
the project.


Qt is a trademark of Nokia Corporation and/or its subsidiary(-ies).
OS/2 and OS/2 Warp are trademarks of the IBM Corporation and/or its subsidiary(-ies).
eComStation is a trademark of Serenity Systems International and/or its subsidiary(-ies).
Etc.