Qt Core: Document CMake macros

Document public macros in Qt5CoreMacros.cmake. This will replace
the list in the current CMake Manual.

Task-number: QTBUG-72159
Change-Id: I377412fe0c1d0a9b232162bbab88ac830d2cac80
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

doc/global/externalsites/external-resources.qdoc

@@ -71,6 +71,11 @@
     \title CMake AUTOMOC Documentation
 */
 
+/*!
+    \externalpage https://cmake.org/cmake/help/latest/manual/cmake-qt.7.html#autorcc
+    \title CMake AUTORCC Documentation
+*/
+
 /*!
     \externalpage https://cmake.org/cmake/help/latest/prop_tgt/LOCATION.html
     \title CMake LOCATION Documentation

src/corelib/doc/snippets/cmake-macros/examples.cmake

@@ -0,0 +1,26 @@
+#! [qt5_wrap_cpp]
+set(SOURCES myapp.cpp main.cpp)
+qt5_wrap_cpp(SOURCES myapp.h)
+add_executable(myapp ${SOURCES})
+#! [qt5_wrap_cpp]
+
+#! [qt5_add_resources]
+set(SOURCES main.cpp)
+qt5_add_resources(SOURCES example.qrc)
+add_executable(myapp ${SOURCES})
+#! [qt5_add_resources]
+
+#! [qt5_add_big_resources]
+set(SOURCES main.cpp)
+qt5_add_big_resources(SOURCES big_resource.qrc)
+add_executable(myapp ${SOURCES})
+#! [qt5_add_big_resources]
+
+#! [qt5_add_binary_resources]
+qt5_add_binary_resources(resources project.qrc OPTIONS -no-compress)
+add_dependencies(myapp resources)
+#! [qt5_add_binary_resources]
+
+#! [qt5_generate_moc]
+qt5_generate_moc(main.cpp main.moc TARGET myapp)
+#! [qt5_generate_moc]

src/corelib/doc/src/cmake-macros.qdoc

@@ -0,0 +1,212 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+\page qtcore-cmake-qt5-wrap-cpp.html
+\ingroup cmake-macros-qtcore
+
+\title qt5_wrap_cpp
+
+\brief Creates \c{.moc} files from sources.
+
+\section1 Synopsis
+
+\badcode
+qt5_wrap_cpp(<VAR> src_file1 [src_file2 ...]
+             [TARGET target]
+             [OPTIONS ...]
+             [DEPENDS ...])
+\endcode
+
+\section1 Description
+
+Creates rules for calling \l{moc}{Meta-Object Compiler (moc)} on the given
+source files. For each input file, an output file is generated in the build
+directory. The paths of the generated files are added to\c{<VAR>}.
+
+\note This is a low-level macro. See the \l{CMake AUTOMOC Documentation} for a
+more convenient way to let source files be processed with \c{moc}.
+
+\section1 Options
+
+You can set an explicit \c{TARGET}. This will make sure that the target
+properties \c{INCLUDE_DIRECTORIES} and \c{COMPILE_DEFINITIONS} are also used
+when scanning the source files with \c{moc}.
+
+You can set additional \c{OPTIONS} that should be added to the \c{moc} calls.
+You can find possible options in the \l{moc}{moc documentation}.
+
+\c{DEPENDS} allows you to add additional dependencies for recreation of the
+generated files. This is useful when the sources have implicit dependencies,
+like code for a Qt plugin that includes a \c{.json} file using the
+Q_PLUGIN_METADATA() macro.
+
+\section1 Examples
+
+\snippet cmake-macros/examples.cmake qt5_wrap_cpp
+*/
+
+/*!
+\page qtcore-cmake-qt5-add-resources.html
+\ingroup cmake-macros-qtcore
+
+\title qt5_add_resources
+
+\brief Compiles binary resources into source code.
+
+\section1 Synopsis
+
+\badcode
+qt5_add_resources(<VAR> file1.qrc [file2.qrc ...]
+                  [OPTIONS ...])
+\endcode
+
+\section1 Description
+
+Creates source code from Qt resource files using the
+\l{Resource Compiler (rcc)}. Paths to the generated source files are added to
+\c{<VAR>}.
+
+\note This is a low-level macro. See the \l{CMake AUTORCC Documentation} for a
+more convenient way to let Qt resource files be processed with \c{rcc}.
+For embedding bigger resources, see \l qt5_add_big_resources.
+
+\section1 Arguments
+
+You can set additional \c{OPTIONS} that should be added to the \c{rcc} calls.
+You can find possible options in the \l{rcc}{rcc documentation}.
+
+\section1 Examples
+
+\snippet cmake-macros/examples.cmake qt5_add_resources
+*/
+
+/*!
+\page qtcore-cmake-qt5-add-big-resources.html
+\ingroup cmake-macros-qtcore
+
+\title qt5_add_big_resources
+
+\brief Compiles big binary resources into object code.
+
+\section1 Synopsis
+
+\badcode
+qt5_add_big_resources(<VAR> file1.qrc [file2.qrc ...]
+                      [OPTIONS ...])
+\endcode
+
+\section1 Description
+
+Creates compiled object files from Qt resource files using the
+\l{Resource Compiler (rcc)}. Paths to the generated files are added to
+\c{<VAR>}.
+
+This is similar to \l qt5_add_resources, but directly generates object
+files (\c .o, \c .obj) files instead of C++ source code. This allows to
+embed bigger resources, where compiling to C++ sources and then to
+binaries would be too time consuming or memory intensive.
+
+\section1 Arguments
+
+You can set additional \c{OPTIONS} that should be added to the \c{rcc} calls.
+You can find possible options in the \l{rcc}{rcc documentation}.
+
+\section1 Examples
+
+\snippet cmake-macros/examples.cmake qt5_add_big_resources
+*/
+
+/*!
+\page qtcore-cmake-qt5_add_binary_resources.html
+\ingroup cmake-macros-qtcore
+
+\title qt5_add_binary_resources
+
+\brief Creates an \c{RCC} file from a list of Qt resource files.
+
+\section1 Synopsis
+
+\badcode
+qt5_add_binary_resources(target file1.qrc [file2.qrc ...]
+                         [DESTINATION ...]
+                         [OPTIONS ...])
+\endcode
+
+\section1 Description
+
+Adds a custom \c target that compiles Qt resource files into a binary \c{.rcc}
+file.
+
+\section1 Arguments
+
+\c{DESTINATION} sets the path of the generated \c{.rcc} file. The default is
+\c{${CMAKE_CURRENT_BINARY_DIR}/${target}.rcc}.
+
+You can set additional \c{OPTIONS} that should be added to the \c{rcc} calls.
+You can find possible options in the \l{rcc}{rcc documentation}.
+
+\section1 Examples
+
+\snippet cmake-macros/examples.cmake qt5_add_binary_resources
+*/
+
+/*!
+\page qtcore-cmake-qt5-generate-moc.html
+\ingroup cmake-macros-qtcore
+
+\title qt5_generate_moc
+
+\brief Calls moc on an input file.
+
+\section1 Synopsis
+
+\badcode
+qt5_generate_moc(src_file dest_file
+                 [TARGET target])
+\endcode
+
+\section1 Description
+
+Creates a rule to call the \l{moc}{Meta-Object Compiler (moc)} on \c src_file
+and store the output in \c dest_file.
+
+\note This is a low-level macro. See the \l{CMake AUTOMOC Documentation} for a
+more convenient way to let source files be processed with \c{moc}.
+\l qt5_wrap_cpp is also similar, but automatically generates a temporary file
+path for you.
+
+\section1 Arguments
+
+You can set an explicit \c{TARGET}. This will make sure that the target
+properties \c{INCLUDE_DIRECTORIES} and \c{COMPILE_DEFINITIONS} are also used
+when scanning the source files with \c{moc}.
+
+\section1 Examples
+
+\snippet cmake-macros/examples.cmake qt5_generate_moc
+*/