Table 6-7. Variables for ports that use Qt
| USE_QT_VER | The port uses the Qt toolkit. Possible values are 3 and 4; each specify the major version of Qt to use. Appropriate parameters are passed to configure script and make. |
| QT_PREFIX | Set to the path where Qt installed to (read-only variable). |
| MOC | Set to the path of moc (read-only variable). Default set according to USE_QT_VER value. |
| QTCPPFLAGS | Additional compiler flags passed via CONFIGURE_ENV for Qt toolkit. Default set according to USE_QT_VER. |
| QTCFGLIBS | Additional libraries for linking passed via CONFIGURE_ENV for Qt toolkit. Default set according to USE_QT_VER. |
| QTNONSTANDARD | Suppress modification of CONFIGURE_ENV, CONFIGURE_ARGS, and MAKE_ENV. |
Table 6-8. Additional variables for ports that use Qt 4.x
| QT_COMPONENTS | Specify tool and library dependencies for Qt4. See below for details. |
| UIC | Set to the path of uic (read-only variable). Default set according to USE_QT_VER value. |
| QMAKE | Set to the path of qmake (read-only variable). Default set according to USE_QT_VER value. |
| QMAKESPEC | Set to the path of configuration file for qmake (read-only variable). Default set according to USE_QT_VER value. |
When USE_QT_VER is set, some useful settings are passed to configure script:
CONFIGURE_ARGS+= --with-qt-includes=${QT_PREFIX}/include \
--with-qt-libraries=${QT_PREFIX}/lib \
--with-extra-libs=${LOCALBASE}/lib \
--with-extra-includes=${LOCALBASE}/include
CONFIGURE_ENV+= MOC="${MOC}" CPPFLAGS="${CPPFLAGS} ${QTCPPFLAGS}" LIBS="${QTCFGLIBS}" \
QTDIR="${QT_PREFIX}" KDEDIR="${KDE_PREFIX}"
If USE_QT_VER is set to 4, the following settings are also deployed:
CONFIGURE_ENV+= UIC="${UIC}" QMAKE="${QMAKE}" QMAKESPEC="${QMAKESPEC}"
MAKE_ENV+= QMAKESPEC="${QMAKESPEC}"
When USE_QT_VER is set to 4, individual Qt4 tool and library dependencies can be specified in the QT_COMPONENTS variable. Every component can be suffixed by either _build or _run, the suffix indicating whether the component should be depended on at buildtime or runtime, respectively. If unsuffixed, the component will be depended on at both build- and runtime. Usually, library components should be specified unsuffixed, tool components should be specified with the _build suffix and plugin components should be specified with the _run suffix. The most commonly used components are listed below (all available components are listed in _QT_COMPONENTS_ALL in /usr/ports/Mk/bsd.qt.mk):
Table 6-9. Available Qt4 library components
| Name | Description |
|---|---|
| corelib | core library (can be omitted unless the port uses nothing but corelib) |
| gui | graphical user interface library |
| network | network library |
| opengl | OpenGL library |
| qt3support | Qt3 compatibility library |
| qtestlib | unit testing library |
| script | script library |
| sql | SQL library |
| xml | XML library |
You can determine which libraries the application depends on, by running ldd on the main executable after a successful compilation.
Table 6-10. Available Qt4 tool components
| Name | Description |
|---|---|
| moc | meta object compiler (needed for almost every Qt application at buildtime) |
| qmake | Makefile generator / build utility |
| rcc | resource compiler (need if the application comes with *.rc or *.qrc files) |
| uic | user interface compiler (needed if the application comes with *.ui files created by Qt Designer - in practice, every Qt application with a GUI) |
Table 6-11. Available Qt4 plugin components
| Name | Description |
|---|---|
| iconengines | SVG icon engine plugin (if the application ships SVG icons) |
| imageformats | imageformat plugins for GIF, JPEG, MNG and SVG (if the application ships image files) |
Example 6-3. Selecting Qt4 components
In this example, the ported application uses the Qt4 graphical user interface library, the Qt4 core library, all of the Qt4 code generation tools and Qt4's Makefile generator. Since the gui library implies a dependency on the core library, corelib does not need to be specified. The Qt4 code generation tools moc, uic and rcc, as well as the Makefile generator qmake are only needed at buildtime, thus they are specified with the _build suffix:
USE_QT_VER= 4 QT_COMPONENTS= gui moc_build qmake_build rcc_build uic_build
If the application does not provide a configure file but a .pro file, you can use the following:
HAS_CONFIGURE= yes
do-configure:
@cd ${WRKSRC} && ${SETENV} ${CONFIGURE_ENV} \
${QMAKE} -unix PREFIX=${PREFIX} texmaker.pro
Note the similarity to the qmake line from the provided BUILD.sh script. Passing CONFIGURE_ENV ensures qmake will see the QMAKESPEC variable, without which it cannot work. qmake generates standard Makefiles, so it is not necessary to write our own build target.
Qt applications often are written to be cross-platform and often X11/Unix isn't the platform they are developed on, which in turn often leads to certain loose ends, like:
Missing additional includepaths. Many applications come with system tray icon support, but neglect to look for includes and/or libraries in the X11 directories. You can tell qmake to add directories to the include and library searchpaths via the command line, for example:
${QMAKE} -unix PREFIX=${PREFIX} INCLUDEPATH+=${LOCALBASE}/include \
LIBS+=-L${LOCALBASE}/lib sillyapp.pro
Bogus installation paths. Sometimes data such as icons or .desktop files are by default installed into directories which aren't scanned by XDG-compatible applications. editors/texmaker is an example for this - look at patch-texmaker.pro in the files directory of that port for a template on how to remedy this directly in the Qmake project file.