| 1 | This is Qt version 4.7.3 for OS/2 and eCS. | 
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| 2 |  | 
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| 3 | This document contains a brief information on the OS/2 version of the Qt | 
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| 4 | library. Please read it carefully before starting your work. You may also | 
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| 5 | visit the project page at | 
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| 6 |  | 
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| 7 | http://svn.netlabs.org/qt4/wiki | 
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| 8 |  | 
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| 9 | to get more information and the latest news and also to report bugs. | 
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| 10 |  | 
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| 11 | To get a brief list of OS/2-specific changes from release to release | 
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| 12 | please see the CHANGES.OS2 file included in this distribution. | 
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| 13 |  | 
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| 14 | IMPORTANT NOTE: | 
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| 15 |  | 
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| 16 | Please consider reading section called "USING OFFICIAL BINARY QT ARCHIVES" | 
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| 17 | below before getting into details of the manual compilation of the | 
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| 18 | Qt toolkit -- to learn the easiest way of getting it work. | 
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| 19 |  | 
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| 20 |  | 
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| 21 |  | 
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| 22 | REQUIREMENTS | 
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| 23 |  | 
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| 24 | In order to compile the Qt library and Qt-based applications, you will need | 
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| 25 | the following tools: | 
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| 26 |  | 
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| 27 | - One of the OS/2 Warp 4, OS/2 Warp 4.5 or eComStation operating systems. | 
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| 28 |  | 
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| 29 | - GCC compiler version 4.4.5 for OS/2 or above, patched OpenWatcom linker and | 
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| 30 | GNU Make 3.81beta1 or above. The GCC compiler must be set up to use the | 
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| 31 | OpenWatcom linker for linking. | 
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| 32 |  | 
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| 33 | If you do not have a working GCC environment with the above requirements, it | 
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| 34 | is recommended to download a ready-to-use GCC 4.4.5 distribution from here: | 
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| 35 |  | 
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| 36 | ftp://ftp.netlabs.org/pub/qt4/gcc-4_4_5-complete-20110303.zip | 
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| 37 |  | 
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| 38 | This distribution includes all tools necessary to compile and build the Qt | 
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| 39 | library from the source code. Just follow the installation instructions | 
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| 40 | contained in the README file inside this ZIP archive to set up the GCC | 
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| 41 | environment. | 
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| 42 |  | 
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| 43 | Please note that starting from Qt 4.6.2, support for GCC 3.3.5 and earlier | 
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| 44 | versions of the compiler has been dropped and the Qt library will most | 
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| 45 | likely not build if you use one of these compilers. Later versions prior to | 
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| 46 | GCC 4.4.2 may work but they are not tested and not supported. | 
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| 47 |  | 
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| 48 | - IBM RC (Resource Compiler) Version 5.00.007 (comes with OS/2 Toolkit 4.5) | 
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| 49 | or Version 4.00.011 (comes with eCS 2.0). Other versions may not work | 
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| 50 | correctly. | 
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| 51 |  | 
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| 52 | There is also a set of optional tools which are necessary to enable the selected | 
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| 53 | features of the Qt library. If these tools are missing, the Qt configuration | 
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| 54 | script (discussed in section "COMPILING QT" below) will automatically disable | 
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| 55 | the corresponding feature: | 
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| 56 |  | 
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| 57 | - Perl 5.8.2 or above. This is required if you want to perform a shadow build | 
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| 58 | of the Qt library (which is a recommended way to go). Please refer to | 
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| 59 | section "COMPILING QT" for more information about shadow builds. Recent | 
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| 60 | builds of Perl for OS/2 are available here: | 
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| 61 |  | 
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| 62 | http://os2ports.smedley.info/index.php?page=perl | 
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| 63 |  | 
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| 64 | - MAPSYM 4.00.000 (Oct 4 2001) to enable generation of symbol (.SYM) files for | 
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| 65 | DLLs and executables. This tool comes with OS/2 Toolkit 4.5. Note that other | 
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| 66 | versions of this tool may not work correctly. | 
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| 67 |  | 
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| 68 | - LxLite 1.3.3 or above (not tested) to enable the compression of DLLs and | 
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| 69 | executables (which saves hard disk space and application startup time). If | 
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| 70 | you use a recent version of eComStation (e.g. 2.0 rc6) you will already have | 
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| 71 | LxLite installed. Otherwise, you may take it from here: | 
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| 72 |  | 
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| 73 | http://www.os2site.com/sw/util/archiver/lxlt133.zip | 
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| 74 |  | 
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| 75 | - CUPS 1.4.8 or later to support printing in Qt. The CUPS libraries are | 
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| 76 | available at: | 
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| 77 |  | 
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| 78 | http://sourceforge.net/projects/ecsports/files/CUPS/cups-1.4.8-os2-20110831.zip/download | 
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| 79 | http://svn.netlabs.org/ecups/wiki/CupsPort | 
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| 80 |  | 
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| 81 | - OpenSSL 0.9.8o or later to support OpenSSL in Qt. The OpenSSL libraries are | 
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| 82 | available at: | 
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| 83 |  | 
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| 84 | http://bauxite.sakura.ne.jp/tmp/os2/openssl-1.0.0a-os2knix-20100706-runtime.zip | 
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| 85 | http://bauxite.sakura.ne.jp/tmp/os2/openssl-1.0.0a-os2knix-20100706-dev.zip | 
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| 86 |  | 
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| 87 | - MySQL 5.1 or later for the MySQL Qt plugin. The MySQL libraries are | 
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| 88 | available at: | 
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| 89 |  | 
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| 90 | http://download.smedley.info/mysql-5.1.51-os2-20101001.zip | 
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| 91 |  | 
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| 92 | Linking against this MySQL build also requires pthread.lib: | 
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| 93 |  | 
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| 94 | http://web.os2power.com/download/lib/pthread-20100217-os2.zip | 
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| 95 |  | 
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| 96 | Note that you will also need the above OpenSSL libraries to be able to use | 
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| 97 | this MySQL build. The MySQL Qt plugin itself will require OpenSSL DLLs in | 
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| 98 | your LIBPATH at runtime. | 
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| 99 |  | 
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| 100 | - PostgersSQL 9.0.1 or later to support the PostgresSQL Qt plugin. The | 
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| 101 | PostgresSQL libraries are available at: | 
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| 102 |  | 
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| 103 | http://download.smedley.info/postgresql-9.0.1-os2-20101108.zip | 
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| 104 |  | 
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| 105 | Note that you will also need libc064x.dll for this PostgresSQL build: | 
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| 106 |  | 
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| 107 | http://download.smedley.info/libc064x.zip | 
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| 108 |  | 
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| 109 | Note that you will also need the above OpenSSL libraries and pthread.lib to | 
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| 110 | be able to use this PostgresSQL build. The PostgresSQL Qt plugin itself will | 
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| 111 | require OpenSSL DLLs in your LIBPATH at runtime. | 
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| 112 |  | 
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| 113 |  | 
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| 114 |  | 
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| 115 | SETTING UP THE ENVIRONMENT | 
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| 116 |  | 
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| 117 | First of all, make sure that your GCC environment is set up and meets the | 
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| 118 | specified requirements. To perform a quick check, you may run the following | 
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| 119 | command: | 
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| 120 |  | 
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| 121 | gcc --version && make --version && wl /version | 
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| 122 |  | 
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| 123 | If the setup is done properly, it will print the versions of the key tools | 
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| 124 | to the console. | 
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| 125 |  | 
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| 126 | The next step is to set up the Qt environment. If you installed the Qt | 
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| 127 | development libraries from the WPI archive (refer to section "USING OFFICIAL | 
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| 128 | BINARY QT ARCHIVES" below for more details about existing WPI archives), you | 
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| 129 | will only need to run the supplied "QtEnv.cmd" script which will do all the | 
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| 130 | setup job for you. The script is located in the directory where you installed | 
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| 131 | the developmnent libraries (or in the WPS folder created by the WPI installer). | 
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| 132 | Execute this script in a command line session to make it ready for building | 
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| 133 | Qt 4 applications (for example, using the "qmake" command follwed by "make" | 
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| 134 | for applications based on qmake project files which most of them are). If you | 
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| 135 | go that way, you may skip the rest of this section and proceed directly to | 
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| 136 | section "USING OFFICIAL BINARY QT ARCHIVES" below. | 
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| 137 |  | 
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| 138 | If you use the full source code ZIP distribution of the Qt library or work | 
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| 139 | directly with the Qt SVN tree, you will need to set up the environment yourself | 
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| 140 | by performing the following steps: | 
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| 141 |  | 
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| 142 | - Add the "bin" subdirectory of the directory where you unpacked the Qt4 | 
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| 143 | source tree to PATH and BEGINLIBPATH, like this: | 
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| 144 |  | 
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| 145 | set PATH=D:\Coding\Qt4\bin;%PATH% | 
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| 146 | set BEGINLIBPATH=D:\Coding\Qt4\bin;%BEGINLIBPATH% | 
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| 147 |  | 
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| 148 | - Add the system DLLs to the GCC library path with the following command: | 
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| 149 |  | 
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| 150 | set LIBRARY_PATH=C:\OS2\DLL;C:\MPTN\DLL;%LIBRARY_PATH% | 
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| 151 |  | 
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| 152 | where C: is your boot drive. | 
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| 153 |  | 
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| 154 | - Make sure CMD.EXE is your command line processor (the generated makefiles | 
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| 155 | will rely on its 'copy', 'if' and other commands). If you have a Unix shell | 
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| 156 | (SH.EXE) in your environment, you may need to force GNU make to use CMD.EXE | 
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| 157 | by executing the followingn command: | 
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| 158 |  | 
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| 159 | set MAKESHELL=C:\OS2\CMD.EXE | 
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| 160 |  | 
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| 161 | where C: is your boot drive. | 
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| 162 |  | 
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| 163 | Note that the QTDIR environment variable used in previous Qt versions is not | 
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| 164 | used in Qt4 anymore. Therefore, there is no need to set this variable | 
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| 165 | explicitly. | 
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| 166 |  | 
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| 167 | There is also no need to set the QMAKESPEC variable explicitly. If it is absent, | 
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| 168 | qmake will use the specification stored in the <Qt4_Home>/mkspecs/default | 
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| 169 | directory, which on OS/2 always refers to the "os2-g++" specification, the only | 
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| 170 | one supported at the present time. | 
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| 171 |  | 
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| 172 | NOTE: | 
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| 173 |  | 
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| 174 | It is especially important to make sure that there are no traces of any | 
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| 175 | other Watcom or OpenWatcom installation in the environment where you build | 
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| 176 | Qt as it will interfere with the patched OpenWatcom linker we use. This | 
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| 177 | basically means removing all environment variables containing "WATCOM" in | 
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| 178 | their names and also removing references to all those Watcom installations | 
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| 179 | from PATH. | 
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| 180 |  | 
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| 181 |  | 
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| 182 |  | 
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| 183 | SETTING UP OPTIONAL TOOLS | 
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| 184 |  | 
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| 185 | The following list describes the steps necessary to set up the optional tools | 
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| 186 | that the Qt library depends on: | 
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| 187 |  | 
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| 188 | - Unzip the CUPS libraries to some directory and set the following environment | 
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| 189 | variables to tell the Qt configure script its location: | 
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| 190 |  | 
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| 191 | set CUPS_INCLUDEPATH=<path_to_CUPS>\include | 
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| 192 | set CUPS_LIBS= | 
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| 193 |  | 
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| 194 | Note that you will also need to add the location of cups.dll to BEGINLIBPATH | 
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| 195 | (if it is not already in your LIBPATH) so that Qt applications can find it | 
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| 196 | at runtime: | 
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| 197 |  | 
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| 198 | set BEGINLIBPATH=<path_to_CUPS>\sbin;%BEGINLIBPATH% | 
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| 199 |  | 
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| 200 | - Unzip the OpenSSL libraries to some directory and set the following | 
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| 201 | environment variables to tell the Qt configure script its location: | 
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| 202 |  | 
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| 203 | set OPENSSL_INCLUDEPATH=<path_to_OpenSSL>\include | 
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| 204 | set OPENSSL_LIBS= | 
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| 205 |  | 
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| 206 | Note that you will also need to add the location of OpenSSL DLLs to | 
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| 207 | BEGINLIBPATH (if they are not already in your LIBPATH) so that Qt | 
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| 208 | applications can find them at runtime: | 
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| 209 |  | 
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| 210 | set BEGINLIBPATH=<path_to_OpenSSL>\dll;%BEGINLIBPATH% | 
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| 211 |  | 
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| 212 | - Unzip the MySQL archive to some directory and set the following environment | 
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| 213 | variables to tell the Qt configure script the library location: | 
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| 214 |  | 
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| 215 | set MYSQL_INCLUDEPATH=<path_to_MySQL>\include' | 
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| 216 | set MYSQL_LIBS=-L<path_to_MySQL>\lib -lmysqlclient_r -L<path_to_OpenSSL>\lib -llibssl -llibcrypto -L<path_to_pthread> -lpthread | 
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| 217 |  | 
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| 218 | Note that you will also need to place OpenSSL DLLs to BEGINLIBPATH (as | 
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| 219 | described above) because the MySQL plugin links statically to them and Qt | 
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| 220 | will not be able to load it otherwise. | 
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| 221 |  | 
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| 222 | - Unzip the PostgresSQL archive to some directory and set the following | 
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| 223 | environment variables to tell the Qt configure script the library location: | 
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| 224 |  | 
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| 225 | set PSQL_INCLUDEPATH=<path_to_PostgresSQL>\include' | 
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| 226 | set PSQL_LIBS=-L<path_to_PostgresSQL>\lib -llibpq -L<path_to_OpenSSL>\lib -llibssl -llibcrypto -L<path_to_pthread> -lpthread | 
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| 227 |  | 
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| 228 | Note that you will also need to place OpenSSL DLLs to BEGINLIBPATH (as | 
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| 229 | described above) because the PostgresSQL plugin links statically to them and | 
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| 230 | Qt will not be able to load it otherwise. | 
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| 231 |  | 
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| 232 | Note that you need to make sure that OpenSSL DLLs are in BEGINLIBPATH or in | 
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| 233 | LIBPATH before Qt attempts to load the SQL plugins for the first time. If it | 
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| 234 | fails to load them, it will cache a failure and will not retry even if the | 
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| 235 | plugins can be loaded later. To fix that, you need to delete the file | 
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| 236 | %HOME%\.config\Trolltech.ini where this cache is stored. | 
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| 237 |  | 
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| 238 |  | 
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| 239 |  | 
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| 240 | COMPILING QT | 
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| 241 |  | 
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| 242 | When the environment is set up as described above, you may build the Qt library. | 
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| 243 | There are two distinct ways of doing this: in the source tree or in a separate | 
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| 244 | directory of your choice. In the first case, all results of the build process | 
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| 245 | (intermediate object files as well as final executables and DLLs) will be placed | 
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| 246 | right in the source tree. In the second case, they will be placed in the | 
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| 247 | separate directory -- this is called a shadow build. | 
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| 248 |  | 
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| 249 | Shadow builds are the recommended way to go because they keep the source | 
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| 250 | directories clean and also allow to use the same source tree for creating any | 
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| 251 | number of builds, each with its own build options. | 
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| 252 |  | 
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| 253 | To perform a shadow build, do the following steps: | 
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| 254 |  | 
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| 255 | 1. Create a directory outside the Qt4 source tree. | 
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| 256 |  | 
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| 257 | 2. Go to that directory. | 
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| 258 |  | 
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| 259 | 3. Type: | 
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| 260 |  | 
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| 261 | <source_tree>\configure.cmd | 
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| 262 |  | 
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| 263 | where <source_tree> is the directory containing the Qt4 source tree. This | 
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| 264 | will create all necessary configuration files, headers, Makefiles and will | 
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| 265 | also build the qmake tool which is necessary to control the rest of the | 
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| 266 | build process (note that building qmake will take some time). | 
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| 267 |  | 
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| 268 | 4. Once the configure process is finished, type: | 
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| 269 |  | 
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| 270 | make | 
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| 271 |  | 
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| 272 | Note that by the default the shadow build will produce the release version of | 
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| 273 | the Qt library. This may be changed by passing command line options to | 
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| 274 | configure.cmd at step 3. For example, the debug build can be requested using | 
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| 275 | the '-debug' option. For a full list of options supported by configure.cmd, | 
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| 276 | type: | 
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| 277 |  | 
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| 278 | configure.cmd -h | 
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| 279 |  | 
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| 280 | To perform a normal build, you execute 'configure.cmd' followed by 'make' right | 
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| 281 | in the directory containing the Qt4 source tree. The default in this case is to | 
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| 282 | build both the debug and release versions of the Qt library. | 
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| 283 |  | 
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| 284 | Please keep in mind that in case of the dual debug and release build (where both | 
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| 285 | flavors are stored in the same build directory), only DLL and LIB files will be | 
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| 286 | separated (because the debug versions of them will have the 'd' suffix in the | 
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| 287 | file name). Executable files are normally taken from the release build but, | 
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| 288 | since the file names are identical, sometimes they may be overwritten by the | 
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| 289 | debug versions (e.g. when you rebuild parts of the library later). For this | 
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| 290 | reason, performing dual builds is not recommended. | 
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| 291 |  | 
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| 292 | The Qt library is huge so the build process will take several hours (or even | 
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| 293 | several dozen of hours) depending on your hardware and configure options. | 
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| 294 |  | 
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| 295 | Once the library is successfully built, you may try to compile the demos and | 
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| 296 | examples by visiting the individual example subdirectories in the source tree | 
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| 297 | and typing 'qmake' followed by 'make'. | 
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| 298 |  | 
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| 299 | NOTE: | 
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| 300 |  | 
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| 301 | This version of Qt for OS/2 includes the Extended system tray plugin for | 
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| 302 | XCenter/eCenter which is necessary to enable Qt support for the special | 
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| 303 | notification area on the XCenter/eCenter panel (called the "system tray") | 
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| 304 | which is used by many long-running applications to display their status. | 
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| 305 | In order to activate this support, you need to install this plugin to your | 
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| 306 | XCenter or eCenter. The plugin is split in two DLLs, the plugin DLL and | 
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| 307 | the API DLL. Both are built as part of the normal build process and can be | 
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| 308 | found in the "src\3rdparty\os2\xsystray\tmp\dist" subdirectory of the Qt | 
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| 309 | build tree. In order to install them, do the following: | 
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| 310 |  | 
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| 311 | a. Copy "plugin\xsystray.dll" to "<XWorkplace_install>\plugins\xcenter\" | 
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| 312 | (on eComStation, this will be "C:\ecs\system\ewps\plugins\xcenter\" | 
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| 313 | where C: is your boot drive). | 
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| 314 |  | 
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| 315 | b. Copy "apilib\xsystray.dll" to a directory listed in LIBPATH. | 
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| 316 |  | 
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| 317 | b. Restart WPS. | 
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| 318 |  | 
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| 319 | c. Add the "Extended system tray" widget to the XCenter/eCenter panel using | 
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| 320 | the XCenter context menu ('Create new widget'). | 
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| 321 |  | 
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| 322 | Note that if you upgrade from the previous version of the plugin then | 
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| 323 | please unlock xsystray.dll in the target folder using the UNLOCK.EXE | 
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| 324 | utility (which you can find in the LxLite package, for example) before | 
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| 325 | performing step a., otherwise the copy operation will fail. | 
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| 326 |  | 
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| 327 | IMPORTANT NOTE: | 
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| 328 |  | 
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| 329 | Please take into account that the Qt library you build on your own as | 
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| 330 | described above is NOT intended for wide distribution with Qt applications | 
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| 331 | you port or create. Such private Qt builds help you develop Qt applications | 
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| 332 | (because you can easily debug your program and parts of the Qt framework at | 
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| 333 | the source level) but being widely distributed they will create a so-called | 
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| 334 | DLL hell when a program running on a user computer crashes because it picks | 
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| 335 | up a wrong build of the Qt library. This will happen because even a single | 
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| 336 | change to Qt configuration options may make your build binary incompatible | 
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| 337 | with another build. And even if you convince the user to isolate different | 
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| 338 | DLLs (using LIBPATHSTRICT and BEGINLIBPATH) it will create another major | 
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| 339 | problem: two different Qt applications will load two different copies of Qt | 
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| 340 | into memory which will create an unnecessary overhead by doubling the | 
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| 341 | amount of used system resources. | 
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| 342 |  | 
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| 343 | In order to nicely solve this problem, netlabs.org provides the official | 
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| 344 | binary builds of the Qt library distributed as RPM packages which are | 
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| 345 | described in the next section. | 
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| 346 |  | 
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| 347 |  | 
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| 348 |  | 
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| 349 | USING OFFICIAL BINARY QT ARCHIVES | 
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| 350 |  | 
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| 351 | For your convenience, netlabs.org provides all components of the Qt toolkit in | 
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| 352 | the form of RPM packages. You may install latest versions of these packages | 
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| 353 | from the netlabs.org RPM repositories using the YUM tool. For example, this | 
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| 354 | command: | 
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| 355 |  | 
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| 356 | yum install qt4-devel-kit | 
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| 357 |  | 
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| 358 | will install the complete Qt development environment, including headers, | 
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| 359 | libraries, tools, examples and the Qt API documentaiton. | 
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| 360 |  | 
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| 361 | This environment is also a proper way to build Qt applications you want to | 
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| 362 | distribute because it guarantees that a proper version of the Qt runtime will | 
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| 363 | be used by your applications when they are installed on the end user's machine. | 
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| 364 |  | 
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| 365 | Buiding applications using this development environment is similar to using | 
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| 366 | your own build of Qt but it is simpler in many ways because you don't need to | 
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| 367 | set up paths to Qt tools and libraries and so on -- the RPM installation | 
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| 368 | procedure will do this for you. | 
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| 369 |  | 
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| 370 | If you don't have YUM or RPM installed, please visit the following page to | 
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| 371 | learn how to do that: | 
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| 372 |  | 
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| 373 | http://svn.netlabs.org/rpm | 
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| 374 |  | 
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| 375 |  | 
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| 376 |  | 
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| 377 |  | 
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| 378 | QMAKE CONFIG OPTIONS | 
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| 379 |  | 
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| 380 | The following CONFIG options of the qmake tool have a special meaning in OS/2: | 
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| 381 |  | 
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| 382 | windows           Turns on generation of PM (WINDOWAPI) executables. By | 
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| 383 | default, this option is set for release builds that link | 
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| 384 | to the Qt GUI library. | 
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| 385 |  | 
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| 386 | console           Turns on generation of text mode (WINDOWCOMPAT) executables. | 
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| 387 | By default, this option is set when setting the "windows" | 
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| 388 | option is not appropriate (see above). | 
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| 389 |  | 
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| 390 | In addition, qmake recognizes the following OS/2-specific CONFIG options: | 
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| 391 |  | 
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| 392 | map               Turns on generation of the .map files for executables and | 
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| 393 | DLLs. Note that this option is not set by default. | 
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| 394 |  | 
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| 395 | sym               Turns on generation of the .sym files for executables and | 
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| 396 | DLLs. The option is turned on by default if configure.cmd | 
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| 397 | is able to find the MAPSYM tool in PATH. | 
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| 398 |  | 
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| 399 | exepack           Turns on compression for executables and DLLs. The option is | 
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| 400 | turned on by default for release builds if configure.cmd | 
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| 401 | is able to find a compression tool (LxLite) in PATH. | 
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| 402 |  | 
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| 403 | highmem           Turns on high memory usage for dynamically allocated memory | 
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| 404 | in DLLs and executables. When this option is set, a special | 
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| 405 | compiler flag (-Zhigh-mem for GCC) is used to enable high | 
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| 406 | memory support in the C library (LIBC). This option is set | 
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| 407 | by default so that all Qt DLLs and Qt applications built | 
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| 408 | with qmake are enabled for high memory. Note that high | 
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| 409 | memory support must be enabled for all LIBC-based DLLs | 
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| 410 | linked to the executable as well as for the executable | 
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| 411 | itself: high memory usage will be disabled if one of them | 
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| 412 | votes against it. | 
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| 413 |  | 
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| 414 | export_all        Cause the linker to export all public symbols in a generated | 
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| 415 | DLL. By default (when this option is absent), only the | 
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| 416 | symbols marked with the __declspec(dllexport) compiler | 
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| 417 | directive in the source files. | 
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| 418 |  | 
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| 419 |  | 
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| 420 |  | 
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| 421 | PRINTING SUPPORT | 
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| 422 |  | 
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| 423 | Starting with version 4.6.2, Qt for OS/2 supports printing through the CUPS | 
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| 424 | framework (provided that this support is enabled when building Qt, see the | 
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| 425 | respective sections in the beginning of this document). The OS/2 implementation | 
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| 426 | of the CUPS framework is provided by the eCUPS package available at | 
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| 427 | http://svn.netlabs.org/ecups/. | 
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| 428 |  | 
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| 429 | The Qt Runtime detects the presence of eCUPS in the system on the fly and talks | 
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| 430 | to the CUPS daemon directly, bypassing the standard OS/2 printing subsystem. | 
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| 431 | This means that in order to print from Qt applications, you don't need to create | 
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| 432 | and configure printer objects using the standard OS/2 system printer setup | 
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| 433 | procedure -- you only need to install eCUPS and configure your printers in | 
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| 434 | there. Please refer to the eCUPS user manual to obtain the detailed instructions | 
|---|
| 435 | on how to configure CUPS printers. | 
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| 436 |  | 
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| 437 |  | 
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| 438 |  | 
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| 439 | FILE WATCHING FUNCTION | 
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| 440 |  | 
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| 441 | Qt supports a mechanism of notifying Qt applications about changes to the file | 
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| 442 | system, such as creating files or directories, changing their attributes or | 
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| 443 | deleting them, even if these changes are performed outside Qt applications. In | 
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| 444 | particular, this is used in standard Qt open file dialogs where you can | 
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| 445 | instantly observe changes made to the directory contents by third-party | 
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| 446 | applications running in the background. | 
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| 447 |  | 
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| 448 | In order to support this functionality on OS/2, Qt relies on the file watching | 
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| 449 | mechanism provided by the Presentation Manager. This mechanism is a global | 
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| 450 | system resource so that only one process may use it at a time. In a standard | 
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| 451 | installation of OS/2 or eComStation this resource is exclusively used by the | 
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| 452 | Workplace Shell and is not available to other applications. In order to overcome | 
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| 453 | this limitation, a respective function was included to xWorkplace, the famous | 
|---|
| 454 | WPS extension (which lives inside the WPS process), starting with version 1.0.8. | 
|---|
| 455 | This function allows any number of other processes to receive notifications | 
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| 456 | about file system changes and it gets utilized by Qt as well. | 
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| 457 |  | 
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| 458 | If an earlier version of xWorkplace is installed on the user system, or if no | 
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| 459 | xWorkplace extension is present at all, Qt uses its own method of detecting | 
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| 460 | file system changes which is based on polling the directory contents in regular | 
|---|
| 461 | intervals. While this method works well for a small number of watched | 
|---|
| 462 | directories with just few files in them, it may significantly slow down the | 
|---|
| 463 | system if you work with a directory containing thousands of files. | 
|---|
| 464 |  | 
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| 465 | Therefore, is strongly recommended to install or upgrade to xWorkplace version | 
|---|
| 466 | 1.0.8 or above to make sure that you will not suffer from the described problem. | 
|---|
| 467 | You will also need to make sure that the "Enable folder auto-refresh" check box | 
|---|
| 468 | located on the "Folder Views" page in the Workplace Shell settings notebook is | 
|---|
| 469 | turned on in order to enable the notification mechanism (note that you may need | 
|---|
| 470 | to reboot after changing its state). | 
|---|
| 471 |  | 
|---|
| 472 |  | 
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| 473 |  | 
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| 474 | ENVIRONMENT VARIABLES | 
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| 475 |  | 
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| 476 | The Qt library recognizes a number of OS/2-specific environment variables that | 
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| 477 | affect its functionality at runtime. The table below lists these variables and | 
|---|
| 478 | their meaning: | 
|---|
| 479 |  | 
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| 480 | QT_PM_NO_DIVE             If set, Qt will not use DIVE (direct interface video | 
|---|
| 481 | extensions) for painting widgets even if DIVE (which | 
|---|
| 482 | provides a much faster painting speed than the | 
|---|
| 483 | regular GPI approach) is available. Currently, this | 
|---|
| 484 | is the default setting if the Panorama video driver | 
|---|
| 485 | is detected because its DIVE implementation contains | 
|---|
| 486 | a number of bugs. | 
|---|
| 487 |  | 
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| 488 | QT_PM_DIVE=<mode>         Enables using DIVE for painting widgets. <mode> is | 
|---|
| 489 | one of: | 
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| 490 |  | 
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| 491 | - FB (direct framebuffer access, which is the | 
|---|
| 492 | fastest mode but causes the curruption of the | 
|---|
| 493 | screen under the software mouse pointer due to | 
|---|
| 494 | the limitation of DIVE). If this mode is not | 
|---|
| 495 | available, BLIT will be used (see below). | 
|---|
| 496 |  | 
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| 497 | - FBSWM (the same FB but hides the mouse pointer | 
|---|
| 498 | before painting which introduces mouse flicker | 
|---|
| 499 | and may be a bit slower than the raw FB). | 
|---|
| 500 |  | 
|---|
| 501 | - BLIT (slower than both FB and FBSWM but prevents | 
|---|
| 502 | screen corruption under the mouse pointer and | 
|---|
| 503 | does not produce the mouse pointer flicker | 
|---|
| 504 | effect). | 
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| 505 |  | 
|---|
| 506 | This variable is ignored if QT_PM_NO_DIVE is set. If | 
|---|
| 507 | neither this nor the QT_PM_NO_DIVE variable is set, | 
|---|
| 508 | the FBSWM mode is used by default (unless the | 
|---|
| 509 | current video driver is Panorama, see above). | 
|---|
| 510 |  | 
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| 511 | QT_PM_NO_SOUND_SHARE      If set, Qt will open the audio device in exclusive | 
|---|
| 512 | only one sound may be played on the computer at a | 
|---|
| 513 | time. This mode is necessary for some sound cards | 
|---|
| 514 | when using the Uniaud audio driver as it is known to | 
|---|
| 515 | have problems with simultaneous playback. | 
|---|
| 516 | Qt builds, | 
|---|
| 517 |  | 
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| 518 | QT_PM_SOUND_SHARE         The opposite to the above. If set, Qt will open the | 
|---|
| 519 | audio device in shared mode. This is the default | 
|---|
| 520 | behavior if neither this nor the | 
|---|
| 521 | QT_PM_NO_SOUND_SHARE variable is set. This variable | 
|---|
| 522 | is ignored if QT_PM_NO_SOUND_SHARE is set. | 
|---|
| 523 |  | 
|---|
| 524 | QT_PM_NO_REGISTRY         If set, Qt will not use the Open32 registry to store | 
|---|
| 525 | application settings with QSettings. Instead, plain | 
|---|
| 526 | text INI files will be used for both NativeFormat | 
|---|
| 527 | and IniFormat. Due to a number of problems in the | 
|---|
| 528 | Open32 registry implementation (that may easily lead | 
|---|
| 529 | to registry corruption), this is the default | 
|---|
| 530 | behavior if neither this nor the QT_PM_REGISTRY | 
|---|
| 531 | variable is set. | 
|---|
| 532 |  | 
|---|
| 533 | QT_PM_REGISTRY            The opposite to the above. If set, Qt will use the | 
|---|
| 534 | Open32 registry to store application settings. This | 
|---|
| 535 | variable is ignored if QT_PM_NO_REGISTRY is set. | 
|---|
| 536 |  | 
|---|
| 537 | QT_PM_NO_SYSTEM_LOCALE    If set, Qt will ignore the regional settings from | 
|---|
| 538 | the system locale object found in the Country | 
|---|
| 539 | Palette located in the System Setup folder and will | 
|---|
| 540 | take them from the internal Qt locale database | 
|---|
| 541 | according to the current country and language | 
|---|
| 542 | settings. Due to the fact that this internal Qt | 
|---|
| 543 | database usually has a better representation of the | 
|---|
| 544 | regional settings, this is the default behavior if | 
|---|
| 545 | neither this nor the QT_PM_SYSTEM_LOCALE variable is | 
|---|
| 546 | set. | 
|---|
| 547 |  | 
|---|
| 548 | QT_PM_SYSTEM_LOCALE       The opposite to the above. If set, Qt will use the | 
|---|
| 549 | regional settings as found in the default locale | 
|---|
| 550 | object set the Country Palette.  This variable is | 
|---|
| 551 | ignored if QT_PM_NO_SYSTEM_LOCALE is set. | 
|---|
| 552 |  | 
|---|
| 553 | LANG                      This variable can be used to override the default | 
|---|
| 554 | country and language used in the Qt application both | 
|---|
| 555 | for regional settings and for translations. The | 
|---|
| 556 | format of the value is "ll_CC" where <ll> is the | 
|---|
| 557 | two-letter ISO language code and <CC> is the two- | 
|---|
| 558 | letter ISO country code. Note that if this variable | 
|---|
| 559 | is not set, Qt will derive the language and country | 
|---|
| 560 | from the system country code specified in the | 
|---|
| 561 | COUNTRY statement of CONFIG.SYS. | 
|---|
| 562 |  | 
|---|
| 563 |  | 
|---|
| 564 |  | 
|---|
| 565 | COMMAND LINE OPTIONS | 
|---|
| 566 |  | 
|---|
| 567 | Any Qt executable recognizes a number of command line options that may change | 
|---|
| 568 | the behavior of the Qt application. Here are the most interesting ones: | 
|---|
| 569 |  | 
|---|
| 570 | -style <name>             Changes the default Qt widget style (theme) to a | 
|---|
| 571 | style with the given name. The buiil-in styles which | 
|---|
| 572 | are always available in the official build include: | 
|---|
| 573 | "windows" (currently, the default on OS/2), "motif", | 
|---|
| 574 | "cde", "plastique" and "cleanlooks". Other styles | 
|---|
| 575 | may be also provided by the style plugins. | 
|---|
| 576 |  | 
|---|
| 577 | -graphicssystem <name>    Changes the graphics system used to paint widgets. | 
|---|
| 578 | On OS/2, only two values are supported: "native" | 
|---|
| 579 | (the default one) and "raster". The "native" system | 
|---|
| 580 | uses DIVE (direct interface video extensions) when | 
|---|
| 581 | it is available. If DIVE is not available or if it | 
|---|
| 582 | is disabled (see the QT_PM_NO_DIVE environment | 
|---|
| 583 | variable description for details), the "raster" | 
|---|
| 584 | system will be automatically selected as a fallback. | 
|---|
| 585 |  | 
|---|
| 586 |  | 
|---|
| 587 |  | 
|---|
| 588 | CURRENT LIMITATIONS | 
|---|
| 589 |  | 
|---|
| 590 | 1. configure.cmd does not understand all command line options understood by | 
|---|
| 591 | configure scripts on other platforms. If you want to customize your build | 
|---|
| 592 | of the Qt library (which is normally not recommended and not supported), | 
|---|
| 593 | you may try to modify configure.cmd itself. | 
|---|
| 594 |  | 
|---|
| 595 | 2. OS/2 bitmap fonts are not supported. Use TTF or Type1 (PFB) fonts with Qt. | 
|---|
| 596 |  | 
|---|
| 597 | 3. No support for widget masks and trapsparency in top-level widgets and in | 
|---|
| 598 | child widgets with native window IDs (Presentation Manager limitation). | 
|---|
| 599 |  | 
|---|
| 600 | 4. No native PM style, but Qt will use fonts and colors from the current | 
|---|
| 601 | OS/2 theme. Hint: if your default OS/2 font is "WarpSans", install the | 
|---|
| 602 | "Workplace Sans" TTF font from Alex Taylor to get more native look & feel. | 
|---|
| 603 | It is recommended to install version 0.7 of the Normal face and version 0.3 | 
|---|
| 604 | of the Bold face which you can find here: | 
|---|
| 605 |  | 
|---|
| 606 | http://users.socis.ca/~ataylo00/creative/fonts/workplace/ | 
|---|
| 607 |  | 
|---|
| 608 | 5. QProcess: when starting PM applications from text-mode applications, the | 
|---|
| 609 | returned PID is a PID of the intermediate cmd.exe process, not the target | 
|---|
| 610 | application. | 
|---|
| 611 |  | 
|---|
| 612 | 6. The following classes are not available due to their rare usage or low | 
|---|
| 613 | importance on the OS/2 platform: QSharedMemory, QSystemSemaphore, | 
|---|
| 614 | QInputContext. On the source level, a number of macros is defined to | 
|---|
| 615 | reflect this, respectively: QT_NO_SYSTEMSEMAPHORE, QT_NO_SHAREDMEMORY, | 
|---|
| 616 | QT_NO_IM. Normally, Qt applications use these macros in the form of | 
|---|
| 617 | "#fndef QT_NO_SOMEFEATURE" to isolate the relevant parts of the code that | 
|---|
| 618 | uses these classes so that the application still builds when the | 
|---|
| 619 | corresponding feature is missing. | 
|---|
| 620 |  | 
|---|
| 621 | 7. No qt3support module. This functionality is rarely necessary in mature | 
|---|
| 622 | real life Qt applications and has low priority. In the code, it is | 
|---|
| 623 | reflected by the absense of the QT3_SUPPORT macro. | 
|---|
| 624 |  | 
|---|
| 625 | 8. The following features are missing (either because of the lack of the | 
|---|
| 626 | required support from the system side or because of the rare usage): | 
|---|
| 627 |  | 
|---|
| 628 | - IPV6 support in the network module (QT_NO_IPV6 is defined). | 
|---|
| 629 | - phonon module (QT_NO_PHONON is defined). | 
|---|
| 630 | - multimedia module (QT_NO_MULTIMEDIA is defined). | 
|---|
| 631 | - OpenGL module (QT_NO_OPENGL is defined). | 
|---|
| 632 | - tablet support (QT_NO_TABLET is defined). | 
|---|
| 633 |  | 
|---|
| 634 | See the project roadmap for more information on the current progress and | 
|---|
| 635 | future plans: | 
|---|
| 636 |  | 
|---|
| 637 | http://svn.netlabs.org/qt4/roadmap | 
|---|
| 638 |  | 
|---|
| 639 | Feel free to request new features and report bugs using the project bug | 
|---|
| 640 | tracker abaialble at: | 
|---|
| 641 |  | 
|---|
| 642 | http://svn.netlabs.org/qt4/report | 
|---|
| 643 |  | 
|---|
| 644 |  | 
|---|
| 645 |  | 
|---|
| 646 | CREDITS | 
|---|
| 647 |  | 
|---|
| 648 | Dmitriy Kuminov (development) | 
|---|
| 649 | Silvan Scherrer (management) | 
|---|
| 650 |  | 
|---|
| 651 | netlabs.org (hosting & support) | 
|---|
| 652 |  | 
|---|
| 653 | Nokia Corporation (original Qt library) | 
|---|
| 654 |  | 
|---|
| 655 | We also want to THANK all individuals and organizations who made the donations | 
|---|
| 656 | to this project and helped to make it happen. Please visit | 
|---|
| 657 |  | 
|---|
| 658 | http://qt.netlabs.org/en/site/index.xml | 
|---|
| 659 |  | 
|---|
| 660 | to get the full list of sponsors and to find information on how you can support | 
|---|
| 661 | the project. | 
|---|
| 662 |  | 
|---|
| 663 |  | 
|---|
| 664 | Qt is a trademark of Nokia Corporation and/or its subsidiary(-ies). | 
|---|
| 665 | OS/2 and OS/2 Warp are trademarks of the IBM Corporation and/or its subsidiary(-ies). | 
|---|
| 666 | eComStation is a trademark of Serenity Systems International and/or its subsidiary(-ies). | 
|---|
| 667 | Etc. | 
|---|