6.9 Using Qt

6.9.1 Ports that require Qt

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}"

6.9.2 Component selection (Qt 4.x only)

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

6.9.3 Additional considerations

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:

For questions about the FreeBSD ports system, e-mail <[email protected]>.
For questions about this documentation, e-mail <[email protected]>.