51 lines
2.3 KiB
ReStructuredText
51 lines
2.3 KiB
ReStructuredText
AUTOMOC
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-------
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Should the target be processed with automoc (for Qt projects).
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AUTOMOC is a boolean specifying whether CMake will handle the Qt ``moc``
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preprocessor automatically, i.e. without having to use the
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:module:`QT4_WRAP_CPP() <FindQt4>` or QT5_WRAP_CPP() macro. Currently Qt4 and Qt5 are
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supported.
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When this property is set ``ON``, CMake will scan the
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source files at build time and invoke moc accordingly.
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* If an ``#include`` statement like ``#include "moc_foo.cpp"`` is found,
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the ``Q_OBJECT`` class declaration is expected in the header, and
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``moc`` is run on the header file. A ``moc_foo.cpp`` file will be
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generated from the source's header into the
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:variable:`CMAKE_CURRENT_BINARY_DIR` directory. This allows the
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compiler to find the included ``moc_foo.cpp`` file regardless of the
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location the original source. However, if multiple source files
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in different directories do this then their generated moc files would
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collide. In this case a diagnostic will be issued.
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* If an ``#include`` statement like ``#include "foo.moc"`` is found,
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then a ``Q_OBJECT`` is expected in the current source file and ``moc``
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is run on the file itself. Additionally, header files with the same
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base name (like ``foo.h``) or ``_p`` appended to the base name (like
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``foo_p.h``) are parsed for ``Q_OBJECT`` macros, and if found, ``moc``
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is also executed on those files. ``AUTOMOC`` checks multiple header
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alternative extensions, such as ``hpp``, ``hxx`` etc when searching
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for headers. The resulting moc files, which are not included as shown
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above in any of the source files are included in a generated
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``<targetname>_automoc.cpp`` file, which is compiled as part of the
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target.
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This property is initialized by the value of the :variable:`CMAKE_AUTOMOC`
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variable if it is set when a target is created.
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Additional command line options for moc can be set via the
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:prop_tgt:`AUTOMOC_MOC_OPTIONS` property.
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By enabling the :variable:`CMAKE_AUTOMOC_RELAXED_MODE` variable the
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rules for searching the files which will be processed by moc can be relaxed.
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See the documentation for this variable for more details.
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The global property :prop_gbl:`AUTOGEN_TARGETS_FOLDER` can be used to group the
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automoc targets together in an IDE, e.g. in MSVS.
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See the :manual:`cmake-qt(7)` manual for more information on using CMake
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with Qt.
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