Refactor CMake build scripts

1. Use FeatureSummary module to show configuration results.

2. Invert option()/find_package() relationship: instead of
calling find_package(... REQUIRED) when option is set, rely on optional
find package call and PackageName_FOUND variable.

3. Refactor handling options that result in simple preprocessor defines
(actually copy the snippet from libtorrent) so that everything is done
in a single function call.

4. Populate target properties in order to get rid of
include_directories() calls.

.travis.yml

@@ -166,7 +166,10 @@ script:
     if [ "$build_system" = "cmake" ]; then
       mkdir build
       cd build
-      cmake -DGUI=${gui} -DCMAKE_INSTALL_PREFIX="$qbt_path" "$MY_CMAKE_OPENSSL_HINT" \
+      if [ "$gui" = "false" ]; then
+        DISABLE_GUI_OPTION="-DCMAKE_DISABLE_FIND_PACKAGE_Qt5Widgets=ON"
+      fi
+      cmake $DISABLE_GUI_OPTION -DCMAKE_INSTALL_PREFIX="$qbt_path" "$MY_CMAKE_OPENSSL_HINT" \
         -G "Ninja" -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=TRUE ..
       BUILD_TOOL="ninja"
     fi

CMakeLists.txt

@@ -1,5 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
-cmake_policy(VERSION 3.5)
+cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
 
 message(WARNING "No official support for cmake build system. If it is broken, please submit patches!")
 
@@ -27,32 +26,29 @@ add_definitions(-DQBT_VERSION_BUILD=${VER_BUILD})
 add_definitions(-DQBT_VERSION="v${PROJECT_VERSION}")
 add_definitions(-DQBT_VERSION_2="${PROJECT_VERSION}")
 
-if (UNIX AND NOT APPLE)
-    include(GNUInstallDirs)
-endif (UNIX AND NOT APPLE)
+include(GNUInstallDirs)
+include(FeatureSummary)
+
+# version requirements
+set(requiredBoostVersion 1.35)
+set(requiredQtVersion 5.5.1)
 
 if(WIN32)
     include(winconf)
 endif(WIN32)
 
-# we need options here, because they are used not only in "src" subdir, but in the "dist" dir too
-include(CMakeDependentOption)
-
-option(SYSTEM_QTSINGLEAPPLICATION
-    "Use the system qtsingleapplication library or shipped one otherwise")
-
-option(GUI "Allows to disable GUI for headless running. Disables QtDBus and the GeoIP Database" ON)
 
-option(WEBUI "Allows to disable the WebUI." ON)
-
-option(STACKTRACE "Enable stacktrace feature" ON)
-
-if (UNIX)
-    cmake_dependent_option(SYSTEMD "Install the systemd service file (headless only)" OFF
-        "NOT GUI" OFF)
-    cmake_dependent_option(DBUS "Enable use of QtDBus (GUI only)" ON "GUI" OFF)
-endif(UNIX)
+# we need options here, at the top level, because they are used not only in "src" subdir, but in the "dist" dir too
+include(CompileFeature)
 
+optional_compile_definitions(COUNTRIES_RESOLUTION FEATURE DESCRIPTION "Enable resolving peers IP addresses to countries"
+    DEFAULT ON DISABLED DISABLE_COUNTRIES_RESOLUTION)
+optional_compile_definitions(STACKTRACE FEATURE DESCRIPTION "Enable stacktraces"
+    DEFAULT ON ENABLED STACKTRACE)
+optional_compile_definitions(WEBUI FEATURE DESCRIPTION "Enables built-in HTTP server for headless use"
+    DEFAULT ON DISABLED DISABLE_WEBUI)
 
 add_subdirectory(src)
 add_subdirectory(dist)
+
+feature_summary(DESCRIPTION "\nConfiguration results:" WHAT ALL)

cmake/Modules/CompileFeature.cmake

@@ -0,0 +1,22 @@
+# Helper function for coupling add_feature_info(), option(), and add_definitions()
+
+function(optional_compile_definitions _name)
+    set(options FEATURE)
+    set(oneValueArgs DESCRIPTION DEFAULT)
+    set(multiValueArgs ENABLED DISABLED)
+    cmake_parse_arguments(OCD "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+    option(${_name} "${OCD_DESCRIPTION}" ${OCD_DEFAULT})
+    if (${${_name}})
+        set_property(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" APPEND PROPERTY COMPILE_DEFINITIONS ${OCD_ENABLED})
+    else()
+        set_property(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" APPEND PROPERTY COMPILE_DEFINITIONS ${OCD_DISABLED})
+    endif()
+    if(${OCD_FEATURE})
+        add_feature_info(${_name} ${_name} "${OCD_DESCRIPTION}")
+    endif()
+endfunction()
+
+macro(feature_option _name _description _default)
+    option(${_name} "${_description}" ${_default})
+    add_feature_info(${_name} ${_name} "${_description}")
+endmacro()

cmake/Modules/FindLibtorrentRasterbar.cmake

@@ -99,6 +99,7 @@ list(FIND LibtorrentRasterbar_DEFINITIONS -DTORRENT_USE_OPENSSL LibtorrentRaster
 if(LibtorrentRasterbar_ENCRYPTION_INDEX GREATER -1)
     find_package(OpenSSL REQUIRED)
     set(LibtorrentRasterbar_LIBRARIES ${LibtorrentRasterbar_LIBRARIES} OpenSSL::SSL OpenSSL::Crypto)
+    list(APPEND LibtorrentRasterbar_INCLUDE_DIRS "${OPENSSL_INCLUDE_DIR}")
     set(LibtorrentRasterbar_OPENSSL_ENABLED ON)
 endif()
 
@@ -113,10 +114,10 @@ mark_as_advanced(LibtorrentRasterbar_INCLUDE_DIR LibtorrentRasterbar_LIBRARY
     LibtorrentRasterbar_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES
     LibtorrentRasterbar_ENCRYPTION_INDEX)
 
-if (LibtorrentRasterbar_FOUND AND NOT TARGET LibtorrentRasterbar::LibTorrent)
-    add_library(LibtorrentRasterbar::LibTorrent UNKNOWN IMPORTED)
+if (LibtorrentRasterbar_FOUND AND NOT TARGET LibtorrentRasterbar::torrent-rasterbar)
+    add_library(LibtorrentRasterbar::torrent-rasterbar UNKNOWN IMPORTED)
 
-    set_target_properties(LibtorrentRasterbar::LibTorrent PROPERTIES
+    set_target_properties(LibtorrentRasterbar::torrent-rasterbar PROPERTIES
         IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
         IMPORTED_LOCATION "${LibtorrentRasterbar_LIBRARY}"
         INTERFACE_INCLUDE_DIRECTORIES "${LibtorrentRasterbar_INCLUDE_DIRS}"

cmake/Modules/FindQtSingleApplication.cmake

@@ -1,20 +1,20 @@
 # - Try to find the QtSingleApplication includes and library
 # which defines
 #
-# QTSINGLEAPPLICATION_FOUND - system has QtSingleApplication
-# QTSINGLEAPPLICATION_INCLUDE_DIR - where to find header QtSingleApplication
-# QTSINGLEAPPLICATION_LIBRARIES - the libraries to link against to use QtSingleApplication
-# QTSINGLEAPPLICATION_LIBRARY - where to find the QtSingleApplication library (not for general use)
+# QtSingleApplication_FOUND - system has QtSingleApplication
+# QtSingleApplication_INCLUDE_DIR - where to find header QtSingleApplication
+# QtSingleApplication_LIBRARIES - the libraries to link against to use QtSingleApplication
+# QtSingleApplication_LIBRARY - where to find the QtSingleApplication library (not for general use)
 
 # copyright (c) 2013 TI_Eugene ti.eugene@gmail.com
 #
 # Redistribution and use is allowed according to the terms of the FreeBSD license.
 
-SET(QTSINGLEAPPLICATION_FOUND FALSE)
+SET(QtSingleApplication_FOUND FALSE)
 
 IF(QT4_FOUND)
     message(STATUS "Looking for Qt4 single application library")
-    FIND_PATH(QTSINGLEAPPLICATION_INCLUDE_DIR QtSingleApplication
+    FIND_PATH(QtSingleApplication_INCLUDE_DIR QtSingleApplication
                 # standard locations
                 /usr/include
                 /usr/include/QtSolutions
@@ -24,71 +24,71 @@ IF(QT4_FOUND)
                 ${FRAMEWORK_INCLUDE_DIR}/QtSolutions
     )
 
-    SET(QTSINGLEAPPLICATION_NAMES ${QTSINGLEAPPLICATION_NAMES}
+    SET(QtSingleApplication_NAMES ${QtSingleApplication_NAMES}
         QtSolutions_SingleApplication-2.6 libQtSolutions_SingleApplication-2.6)
-    FIND_LIBRARY(QTSINGLEAPPLICATION_LIBRARY
-        NAMES ${QTSINGLEAPPLICATION_NAMES}
+    FIND_LIBRARY(QtSingleApplication_LIBRARY
+        NAMES ${QtSingleApplication_NAMES}
         PATHS ${QT_LIBRARY_DIR}
     )
 ELSEIF(Qt5Core_FOUND)
     message(STATUS "Looking for Qt5 single application library")
     FOREACH(TOP_INCLUDE_PATH in ${Qt5Core_INCLUDE_DIRS} ${FRAMEWORK_INCLUDE_DIR})
-        FIND_PATH(QTSINGLEAPPLICATION_INCLUDE_DIR QtSingleApplication ${TOP_INCLUDE_PATH}/QtSolutions)
+        FIND_PATH(QtSingleApplication_INCLUDE_DIR QtSingleApplication ${TOP_INCLUDE_PATH}/QtSolutions)
 
-        IF(QTSINGLEAPPLICATION_INCLUDE_DIR)
+        IF(QtSingleApplication_INCLUDE_DIR)
             BREAK()
         ENDIF()
     ENDFOREACH()
 
-    SET(QTSINGLEAPPLICATION_NAMES ${QTSINGLEAPPLICATION_NAMES}
+    SET(QtSingleApplication_NAMES ${QtSingleApplication_NAMES}
         Qt5Solutions_SingleApplication-2.6 libQt5Solutions_SingleApplication-2.6
         QtSolutions_SingleApplication-2.6 libQtSolutions_SingleApplication-2.6)
     GET_TARGET_PROPERTY(_QT5_CORELIBRARY Qt5::Core LOCATION)
     GET_FILENAME_COMPONENT(_QT5_CORELIBRARYPATH ${_QT5_CORELIBRARY} PATH)
 
-    FIND_LIBRARY(QTSINGLEAPPLICATION_LIBRARY
-        NAMES ${QTSINGLEAPPLICATION_NAMES}
+    FIND_LIBRARY(QtSingleApplication_LIBRARY
+        NAMES ${QtSingleApplication_NAMES}
         PATHS ${_QT5_CORELIBRARYPATH}
     )
 ENDIF()
 
-IF (QTSINGLEAPPLICATION_LIBRARY AND QTSINGLEAPPLICATION_INCLUDE_DIR)
+IF (QtSingleApplication_LIBRARY AND QtSingleApplication_INCLUDE_DIR)
 
-    SET(QTSINGLEAPPLICATION_LIBRARIES ${QTSINGLEAPPLICATION_LIBRARY})
-    SET(QTSINGLEAPPLICATION_FOUND TRUE)
+    SET(QtSingleApplication_LIBRARIES ${QtSingleApplication_LIBRARY})
+    SET(QtSingleApplication_FOUND TRUE)
 
     IF (CYGWIN)
         IF(BUILD_SHARED_LIBS)
-        # No need to define QTSINGLEAPPLICATION_USE_DLL here, because it's default for Cygwin.
+        # No need to define QtSingleApplication_USE_DLL here, because it's default for Cygwin.
         ELSE(BUILD_SHARED_LIBS)
-        SET (QTSINGLEAPPLICATION_DEFINITIONS -DQTSINGLEAPPLICATION_STATIC)
+        SET (QtSingleApplication_DEFINITIONS -DQTSINGLEAPPLICATION_STATIC)
         ENDIF(BUILD_SHARED_LIBS)
     ENDIF (CYGWIN)
 
-ENDIF (QTSINGLEAPPLICATION_LIBRARY AND QTSINGLEAPPLICATION_INCLUDE_DIR)
+ENDIF (QtSingleApplication_LIBRARY AND QtSingleApplication_INCLUDE_DIR)
 
-IF (QTSINGLEAPPLICATION_FOUND)
+IF (QtSingleApplication_FOUND)
     IF (NOT QtSingleApplication_FIND_QUIETLY)
-    MESSAGE(STATUS "Found QtSingleApplication: ${QTSINGLEAPPLICATION_LIBRARY}")
-    MESSAGE(STATUS "         includes: ${QTSINGLEAPPLICATION_INCLUDE_DIR}")
+        MESSAGE(STATUS "Found QtSingleApplication: ${QtSingleApplication_LIBRARY}")
+        MESSAGE(STATUS "         includes: ${QtSingleApplication_INCLUDE_DIR}")
     ENDIF (NOT QtSingleApplication_FIND_QUIETLY)
-ELSE (QTSINGLEAPPLICATION_FOUND)
-  IF (QtSingleApplication_FIND_REQUIRED)
-    MESSAGE(FATAL_ERROR "Could not find QtSingleApplication library")
-  ENDIF (QtSingleApplication_FIND_REQUIRED)
-ENDIF (QTSINGLEAPPLICATION_FOUND)
-
-MARK_AS_ADVANCED(QTSINGLEAPPLICATION_INCLUDE_DIR QTSINGLEAPPLICATION_LIBRARY)
-
-if(NOT TARGET QtSingleApplication::QtSingleApplication)
+    if(NOT TARGET QtSingleApplication::QtSingleApplication)
         add_library(QtSingleApplication::QtSingleApplication UNKNOWN IMPORTED)
         set_target_properties(QtSingleApplication::QtSingleApplication PROPERTIES
-        INTERFACE_INCLUDE_DIRECTORIES "${QTSINGLEAPPLICATION_INCLUDE_DIR}"
-        INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "${QTSINGLEAPPLICATION_INCLUDE_DIR}"
+            INTERFACE_INCLUDE_DIRECTORIES "${QtSingleApplication_INCLUDE_DIR}"
+            INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "${QtSingleApplication_INCLUDE_DIR}"
         )
-    if(EXISTS "${QTSINGLEAPPLICATION_LIBRARY}")
+        if(EXISTS "${QtSingleApplication_LIBRARY}")
         set_target_properties(QtSingleApplication::QtSingleApplication PROPERTIES
             IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
-        IMPORTED_LOCATION "${QTSINGLEAPPLICATION_LIBRARY}")
+            IMPORTED_LOCATION "${QtSingleApplication_LIBRARY}")
         endif()
-endif(NOT TARGET QtSingleApplication::QtSingleApplication)
+    endif(NOT TARGET QtSingleApplication::QtSingleApplication)
+
+ELSE (QtSingleApplication_FOUND)
+  IF (QtSingleApplication_FIND_REQUIRED)
+    MESSAGE(FATAL_ERROR "Could not find QtSingleApplication library")
+  ENDIF (QtSingleApplication_FIND_REQUIRED)
+ENDIF (QtSingleApplication_FOUND)
+
+MARK_AS_ADVANCED(QtSingleApplication_INCLUDE_DIR QtSingleApplication_LIBRARY)

cmake/Modules/QbtTargetSources.cmake

@@ -1,16 +1,17 @@
-# a helper function which appends source to the main qBt target
-# sources file names are relative to the the ${qBittorrent_SOURCE_DIR}
+# a helper function which appends source to the target
+# sources file names are relative to the the target source dir
 
-function (qbt_target_sources)
-    set (_sources_rel "")
-    foreach (_source IN ITEMS ${ARGN})
-        if (IS_ABSOLUTE "${_source}")
-            set(source_abs "${_source}")
+function (qbt_target_sources _target _scope)
+    get_target_property(targetSourceDir ${_target} SOURCE_DIR)
+    set(sourcesRelative "")
+    foreach(source IN ITEMS ${ARGN})
+        if(IS_ABSOLUTE "${source}")
+            set(sourceAbsolutePath "${source}")
         else()
-            get_filename_component(_source_abs "${_source}" ABSOLUTE)
+            get_filename_component(sourceAbsolutePath "${source}" ABSOLUTE)
         endif()
-        file (RELATIVE_PATH _source_rel "${qbt_executable_SOURCE_DIR}" "${_source_abs}")
-        list (APPEND _sources_rel "${_source_rel}")
+        file(RELATIVE_PATH sourceRelativePath "${targetSourceDir}" "${sourceAbsolutePath}")
+        list(APPEND sourcesRelative "${sourceRelativePath}")
     endforeach()
-    target_sources (qBittorrent PRIVATE "${_sources_rel}")
-endfunction (qbt_target_sources)
+    target_sources(${_target} ${_scope} "${sourcesRelative}")
+endfunction(qbt_target_sources)

dist/CMakeLists.txt

@@ -1,3 +1,5 @@
+find_package(Qt5Widgets ${requiredQtVersion}) # to conditionally install desktop-related files
+
 if (APPLE)
     add_subdirectory(mac)
 else (APPLE)

dist/unix/CMakeLists.txt

@@ -1,26 +1,32 @@
-if (SYSTEMD)
+if (NOT Qt5Widgets_FOUND)
+    feature_option(SYSTEMD "Install systemd service file (headless only)" OFF)
+    if (SYSTEMD)
+        if (NOT Systemd_SERVICES_INSTALL_DIR)
             find_package(Systemd)
-    if (SYSTEMD_FOUND)
+            if (NOT Systemd_FOUND)
+                message(FATAL_ERROR "Could not locate systemd services install dir."
+                " Either pass -DSystemd_SERVICES_INSTALL_DIR=/path/to/systemd/services option or install systemd pkg-config")
+            endif(NOT Systemd_FOUND)
+        endif(NOT Systemd_SERVICES_INSTALL_DIR)
         set(EXPAND_BINDIR ${CMAKE_INSTALL_FULL_BINDIR})
         configure_file(systemd/qbittorrent-nox@.service.in ${CMAKE_CURRENT_BINARY_DIR}/qbittorrent-nox@.service @ONLY)
         install(FILES ${CMAKE_CURRENT_BINARY_DIR}/qbittorrent-nox@.service
-            DESTINATION ${SYSTEMD_SERVICES_INSTALL_DIR}
+            DESTINATION ${Systemd_SERVICES_INSTALL_DIR}
             COMPONENT data)
-    endif(SYSTEMD_FOUND)
-endif(SYSTEMD)
-
+    endif(SYSTEMD)
+endif()
 
-if (GUI)
+if (Qt5Widgets_FOUND)
     list(APPEND MAN_FILES ${qBittorrent_SOURCE_DIR}/doc/qbittorrent.1)
-else (GUI)
+else (Qt5Widgets_FOUND)
     list(APPEND MAN_FILES ${qBittorrent_SOURCE_DIR}/doc/qbittorrent-nox.1)
-endif (GUI)
+endif (Qt5Widgets_FOUND)
 
 install(FILES ${MAN_FILES}
         DESTINATION ${CMAKE_INSTALL_MANDIR}/man1
         COMPONENT doc)
 
-if (GUI)
+if (Qt5Widgets_FOUND)
     install(DIRECTORY menuicons/
             DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor
             FILES_MATCHING PATTERN "*.png")

src/CMakeLists.txt

@@ -1,40 +1,45 @@
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 set(CMAKE_CXX_STANDARD "11")
-add_definitions(-DBOOST_NO_CXX11_RVALUE_REFERENCES)
 
 include(MacroQbtCompilerSettings)
 qbt_set_compiler_options()
 
-include(MacroLinkQtComponents)
 include(QbtTargetSources)
 
+find_package(Boost ${requiredBoostVersion} REQUIRED)
 find_package(LibtorrentRasterbar REQUIRED)
 
-# Qt
-list(APPEND QBT_QT_COMPONENTS Core Network Xml)
-if (GUI)
-    list (APPEND QBT_QT_COMPONENTS Gui Svg Widgets)
-    if (WIN32)
-        list (APPEND QBT_QT_COMPONENTS WinExtras)
-    endif(WIN32)
-    if (APPLE)
-        list (APPEND QBT_GUI_OPTIONAL_LINK_LIBRARIES objc)
-        list (APPEND QBT_QT_COMPONENTS MacExtras)
-    endif (APPLE)
-endif (GUI)
-if (DBUS)
-    list (APPEND QBT_QT_COMPONENTS DBus)
-endif (DBUS)
-find_package(Qt5 5.5.1 COMPONENTS ${QBT_QT_COMPONENTS} REQUIRED)
-
-if (GUI AND APPLE)
-    # Fix MOC inability to detect macOS. This seems to only affect cmake.
-    # Relevant issue: https://bugreports.qt.io/browse/QTBUG-58325
-    set(CMAKE_AUTOMOC_MOC_OPTIONS ${CMAKE_AUTOMOC_MOC_OPTIONS} -DQ_OS_MAC)
-endif ()
+if (Boost_VERSION VERSION_LESS 106000)
+    add_definitions(-DBOOST_NO_CXX11_RVALUE_REFERENCES)
+endif()
+
+find_package(Qt5 ${requiredQtVersion} REQUIRED COMPONENTS Core Network Xml)
+find_package(Qt5Widgets ${requiredQtVersion})
+if (Qt5Widgets_FOUND)
+    find_package(Qt5DBus ${requiredQtVersion})
+else()
+    add_definitions(-DDISABLE_GUI)
+endif()
+
+set_package_properties(Qt5Widgets PROPERTIES
+    DESCRIPTION "Set of components for creating classic desktop-style UIs for the Qt5 framework"
+    PURPOSE "Enables qBittorrent GUI. Unneeded for headless configuration."
+    TYPE OPTIONAL
+)
+
+set_package_properties(Qt5DBus PROPERTIES
+    DESCRIPTION "Qt5 module for inter-process communication over the D-Bus protocol"
+    PURPOSE "Enables communication with other system components (e.g. notification service) via D-Bus. "
+    TYPE RECOMMENDED
+)
 
 set(CMAKE_AUTOMOC True)
 list(APPEND CMAKE_AUTORCC_OPTIONS -compress 9 -threshold 5)
+if (APPLE)
+    # Workaround CMake bug (autogen does not pass required parameters to moc)
+    # Relevant issue: https://gitlab.kitware.com/cmake/cmake/issues/18041
+    list(APPEND CMAKE_AUTOMOC_MOC_OPTIONS -DQ_OS_MAC -DQ_OS_DARWIN)
+endif ()
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 
@@ -43,56 +48,34 @@ add_definitions(-DQT_NO_CAST_TO_ASCII)
 # Efficient construction for QString & QByteArray (Qt >= 4.8)
 add_definitions(-DQT_USE_QSTRINGBUILDER)
 
-if (NOT GUI)
-    add_definitions(-DDISABLE_GUI -DDISABLE_COUNTRIES_RESOLUTION)
-endif (NOT GUI)
-
-if (NOT WEBUI)
-    add_definitions(-DDISABLE_WEBUI)
-endif (NOT WEBUI)
-
-if (STACKTRACE)
-    add_definitions(-DSTACKTRACE)
-endif(STACKTRACE)
-# nogui {
-#     TARGET = qbittorrent-nox
-# } else {
-#     CONFIG(static) {
-#         DEFINES += QBT_STATIC_QT
-#         QTPLUGIN += qico
-#     }
-#     TARGET = qbittorrent
-# }
-
-if (UNIX AND NOT APPLE)
-    add_compile_options(-Wformat -Wformat-security)
-endif ()
-
-if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+if (CMAKE_BUILD_TYPE MATCHES "Debug")
     message(STATUS "Project is built in DEBUG mode.")
-else (CMAKE_BUILD_TYPE STREQUAL "Debug")
+else()
     message(STATUS "Project is built in RELEASE mode.")
     message(STATUS "Disabling debug output.")
     add_definitions(-DQT_NO_DEBUG_OUTPUT)
-endif (CMAKE_BUILD_TYPE STREQUAL "Debug")
-
-set(QBT_USE_GUI ${GUI})
-set(QBT_USE_WEBUI ${WEBUI})
+endif()
 
 configure_file(config.h.cmakein ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 
-if (SYSTEM_QTSINGLEAPPLICATION)
-    find_package(QtSingleApplication REQUIRED)
-else (SYSTEM_QTSINGLEAPPLICATION)
+find_package(QtSingleApplication)
+set_package_properties(QtSingleApplication PROPERTIES
+    URL "https://code.qt.io/cgit/qt-solutions/qt-solutions.git/"
+    DESCRIPTION "Qt library to start applications only once per user"
+    TYPE RECOMMENDED
+    PURPOSE "Use the system qtsingleapplication library or shipped one otherwise"
+)
+
+if (NOT QtSingleApplication_FOUND)
     add_subdirectory(app/qtsingleapplication)
-endif (SYSTEM_QTSINGLEAPPLICATION)
+endif ()
 
 add_subdirectory(app)
 add_subdirectory(base)
 
-if (GUI)
+if (Qt5Widgets_FOUND)
     add_subdirectory(gui)
-endif (GUI)
+endif ()
 
 if (WEBUI)
     add_subdirectory(webui)

src/app/CMakeLists.txt

@@ -1,19 +1,27 @@
-project(qbt_executable)
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-
-set(QBT_APP_HEADERS
+add_executable(qBittorrent
 application.h
 cmdoptions.h
 filelogger.h
-)
-
-set(QBT_APP_SOURCES
+upgrade.h
 application.cpp
 cmdoptions.cpp
 filelogger.cpp
 main.cpp
 )
 
+target_include_directories(qBittorrent PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+target_link_libraries(qBittorrent
+    PRIVATE
+        qbt_base
+)
+
+set_target_properties(qBittorrent
+    PROPERTIES
+        AUTOUIC True
+        AUTORCC True
+        MACOSX_BUNDLE True
+)
+
 # translations
 file(GLOB QBT_TS_FILES ../lang/*.ts)
 get_filename_component(QBT_QM_FILES_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/../lang" ABSOLUTE)
@@ -46,51 +54,41 @@ qt5_add_resources(QBT_APP_RESOURCE_SOURCE ${QBT_APP_RESOURCES})
 
 if (WIN32)
     if (MINGW)
-        list (APPEND QBT_APP_SOURCES ../qbittorrent_mingw.rc)
+        target_sources(qBittorrent PRIVATE ../qbittorrent_mingw.rc)
     else (MINGW)
-        list (APPEND QBT_APP_SOURCES ../qbittorrent.rc)
+        target_sources(qBittorrent PRIVATE ../qbittorrent.rc)
     endif (MINGW)
-    list(APPEND QBT_APP_SOURCES ../qbittorrent.exe.manifest)
+    target_sources(qBittorrent PRIVATE ../qbittorrent.exe.manifest)
 endif (WIN32)
 
 if (STACKTRACE)
     if (UNIX)
-        list(APPEND QBT_APP_HEADERS stacktrace.h)
+        target_sources(qBittorrent PRIVATE stacktrace.h)
     else (UNIX)
-        list(APPEND QBT_APP_HEADERS stacktrace_win.h)
-        if (GUI)
-            list(APPEND QBT_APP_HEADERS stacktrace_win_dlg.h)
-        endif (GUI)
+        target_sources(qBittorrent PRIVATE stacktrace_win.h)
+        if (Qt5Widgets_FOUND)
+            target_sources(qBittorrent PRIVATE stacktrace_win_dlg.h)
+        endif (Qt5Widgets_FOUND)
     endif (UNIX)
 endif (STACKTRACE)
 
-# usesystemqtsingleapplication {
-#     nogui {
-#         CONFIG += qtsinglecoreapplication
-#     } else {
-#         CONFIG += qtsingleapplication
-#     }
-# } else {
-#     nogui {
-#         include(qtsingleapplication/qtsinglecoreapplication.pri)
-#     } else {
-#         include(qtsingleapplication/qtsingleapplication.pri)
-#     }
-# }
-
-# upgrade code
-list(APPEND QBT_APP_HEADERS upgrade.h)
-list(APPEND QBT_TARGET_LIBRARIES qbt_base)
-
-if (GUI)
-    list(APPEND QBT_TARGET_LIBRARIES qbt_searchengine qbt_gui)
-    include_directories(../gui
-        ${CMAKE_CURRENT_BINARY_DIR}/../gui
+
+if (Qt5Widgets_FOUND)
+    target_link_libraries(qBittorrent PRIVATE qbt_searchengine qbt_gui)
+    set_target_properties(qBittorrent
+        PROPERTIES
+            OUTPUT_NAME qbittorrent
+            WIN32_EXECUTABLE True
     )
-endif (GUI)
+else(Qt5Widgets_FOUND)
+    set_target_properties(qBittorrent
+        PROPERTIES
+            OUTPUT_NAME qbittorrent-nox
+    )
+endif (Qt5Widgets_FOUND)
 
 if (WEBUI)
-    list(APPEND QBT_TARGET_LIBRARIES qbt_webui)
+    target_link_libraries(qBittorrent PRIVATE qbt_webui)
 endif (WEBUI)
 
 # we have to include resources into the bundle
@@ -142,30 +140,11 @@ if (APPLE)
         PROPERTIES MACOSX_PACKAGE_LOCATION translations)
 endif (APPLE)
 
-add_executable(qBittorrent ${QBT_APP_HEADERS} ${QBT_APP_SOURCES} ${QBT_QM_FILES} ${QBT_APP_RESOURCE_SOURCE})
-if (GUI)
-    set_target_properties(qBittorrent
-        PROPERTIES
-            OUTPUT_NAME qbittorrent
-            WIN32_EXECUTABLE True
-    )
-else (GUI)
-    set_target_properties(qBittorrent
-        PROPERTIES
-            OUTPUT_NAME qbittorrent-nox
-    )
-endif (GUI)
-
-set_target_properties(qBittorrent
-    PROPERTIES
-        AUTOUIC True
-        AUTORCC True
-        MACOSX_BUNDLE True
-)
+target_sources(qBittorrent PRIVATE ${QBT_QM_FILES} ${QBT_APP_RESOURCE_SOURCE})
 
 get_target_property(QBT_EXECUTABLE_NAME qBittorrent OUTPUT_NAME)
 
-target_link_libraries(qBittorrent ${QBT_TARGET_LIBRARIES} QtSingleApplication::QtSingleApplication)
+target_link_libraries(qBittorrent PRIVATE ${QBT_TARGET_LIBRARIES} QtSingleApplication::QtSingleApplication)
 
 if (APPLE)
     set(qbt_BUNDLE_NAME ${QBT_EXECUTABLE_NAME})
@@ -186,6 +165,7 @@ install(TARGETS qBittorrent
     BUNDLE  DESTINATION .
     COMPONENT runtime)
 
-if (GUI AND APPLE)
+if (Qt5Widgets_FOUND AND APPLE)
+    find_package(Qt5Svg REQUIRED)
     include(bundle)
-endif (GUI AND APPLE)
+endif (Qt5Widgets_FOUND AND APPLE)

src/app/qtsingleapplication/CMakeLists.txt

@@ -8,24 +8,24 @@ set(QBT_QTSINGLEAPPLICATION_SOURCES
 qtlocalpeer.cpp
 )
 
-if (GUI)
+if (Qt5Widgets_FOUND)
     list(APPEND QBT_QTSINGLEAPPLICATION_HEADERS qtsingleapplication.h)
     list(APPEND QBT_QTSINGLEAPPLICATION_SOURCES qtsingleapplication.cpp)
-else (GUI)
+else (Qt5Widgets_FOUND)
     list(APPEND QBT_QTSINGLEAPPLICATION_HEADERS qtsinglecoreapplication.h)
     list(APPEND QBT_QTSINGLEAPPLICATION_SOURCES qtsinglecoreapplication.cpp)
-endif (GUI)
+endif (Qt5Widgets_FOUND)
 
 add_library(qtsingleapplication STATIC ${QBT_QTSINGLEAPPLICATION_HEADERS} ${QBT_QTSINGLEAPPLICATION_SOURCES})
 target_include_directories(qtsingleapplication INTERFACE "${qtsingleapplication_SOURCE_DIR}")
-target_link_qt_components(qtsingleapplication Network)
+target_link_libraries(qtsingleapplication PRIVATE Qt5::Network)
 
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
     target_compile_options(qtsingleapplication PRIVATE "-w") # disable warning for 3rdparty code
 endif()
 
-if (GUI)
-    target_link_qt_components(qtsingleapplication Widgets)
-endif (GUI)
+if (Qt5Widgets_FOUND)
+    target_link_libraries(qtsingleapplication PRIVATE Qt5::Widgets)
+endif (Qt5Widgets_FOUND)
 
 add_library(QtSingleApplication::QtSingleApplication ALIAS qtsingleapplication)

src/base/CMakeLists.txt

@@ -1,6 +1,6 @@
 find_package(ZLIB 1.2.5.2 REQUIRED)
 
-set(QBT_BASE_HEADERS
+add_library(qbt_base STATIC
 bittorrent/addtorrentparams.h
 bittorrent/cachestatus.h
 bittorrent/infohash.h
@@ -72,9 +72,6 @@ torrentfilter.h
 tristatebool.h
 types.h
 unicodestrings.h
-)
-
-set(QBT_BASE_SOURCES
 bittorrent/infohash.cpp
 bittorrent/magneturi.cpp
 bittorrent/peerinfo.cpp
@@ -137,16 +134,20 @@ torrentfilter.cpp
 tristatebool.cpp
 )
 
-add_library(qbt_base STATIC ${QBT_BASE_HEADERS} ${QBT_BASE_SOURCES})
-target_link_libraries(qbt_base PRIVATE ZLIB::ZLIB PUBLIC LibtorrentRasterbar::LibTorrent)
-target_link_qt_components(qbt_base PUBLIC Core Network Xml)
+target_link_libraries(qbt_base
+    PRIVATE
+        ZLIB::ZLIB
+    PUBLIC
+        LibtorrentRasterbar::torrent-rasterbar
+        Qt5::Core Qt5::Network Qt5::Xml
+)
 
-if (GUI)
+if (Qt5Widgets_FOUND)
     target_link_libraries(qbt_base PUBLIC Qt5::Gui Qt5::Widgets)
-endif (GUI)
+endif (Qt5Widgets_FOUND)
 
-if (DBUS)
-    target_link_qt_components(qbt_base PRIVATE DBus)
+if (Qt5DBus_FOUND)
+    target_link_libraries(qbt_base PRIVATE Qt5::DBus)
 endif ()
 
 if (APPLE)

src/gui/CMakeLists.txt

@@ -1,7 +1,8 @@
 set(CMAKE_AUTORCC True)
 set(CMAKE_AUTOUIC True)
 
-include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+add_library(qbt_gui_headers INTERFACE)
+target_include_directories(qbt_gui_headers INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
 
 add_subdirectory(lineedit)
 add_subdirectory(properties)
@@ -9,24 +10,8 @@ add_subdirectory(powermanagement)
 add_subdirectory(rss)
 add_subdirectory(search)
 
-if (UNIX AND NOT APPLE AND DBUS)
-   add_subdirectory(qtnotify)
-   include_directories(qtnotify)
-   list(APPEND QBT_GUI_OPTIONAL_LINK_LIBRARIES qbt_qtnotify)
-endif (UNIX AND NOT APPLE AND DBUS)
-
-include_directories(
-${CMAKE_CURRENT_BINARY_DIR}/properties
-${CMAKE_CURRENT_BINARY_DIR}/rss
-${CMAKE_CURRENT_BINARY_DIR}/search
-lineedit/src
-powermanagement
-properties
-rss
-../app
-)
-
-set(QBT_GUI_HEADERS
+add_library(qbt_gui STATIC
+# headers
 about_imp.h
 addnewtorrentdialog.h
 advancedsettings.h
@@ -75,9 +60,7 @@ transferlistsortmodel.h
 transferlistwidget.h
 updownratiodlg.h
 utils.h
-)
-
-set(QBT_GUI_SOURCES
+# sources
 addnewtorrentdialog.cpp
 advancedsettings.cpp
 autoexpandabledialog.cpp
@@ -122,19 +105,7 @@ transferlistsortmodel.cpp
 transferlistwidget.cpp
 updownratiodlg.cpp
 utils.cpp
-)
-
-if (APPLE)
-    list(APPEND QBT_GUI_HEADERS macutilities.h)
-    list(APPEND QBT_GUI_SOURCES macutilities.mm)
-endif (APPLE)
-
-if (WIN32 OR APPLE)
-    list(APPEND QBT_GUI_HEADERS programupdater.h)
-    list(APPEND QBT_GUI_SOURCES programupdater.cpp)
-endif (WIN32 OR APPLE)
-
-set(QBT_GUI_FORMS
+# forms
 mainwindow.ui
 about.ui
 banlistoptions.ui
@@ -156,17 +127,36 @@ torrentcreatordlg.ui
 shutdownconfirmdlg.ui
 )
 
-qbt_target_sources(about.qrc)
-
-add_library(qbt_gui STATIC ${QBT_GUI_HEADERS} ${QBT_GUI_SOURCES} ${QBT_GUI_FORMS})
-target_link_libraries(qbt_gui qbt_lineedit qbt_powermanagement qbt_rss qbt_properties qbt_searchengine
-    ${QBT_GUI_OPTIONAL_LINK_LIBRARIES} qbt_base
+target_link_libraries(qbt_gui
+    PRIVATE
+        qbt_lineedit qbt_powermanagement qbt_rss qbt_properties qbt_searchengine
+        qbt_base
         QtSingleApplication::QtSingleApplication
 )
-if(WIN32)
-    target_link_libraries(qbt_gui Qt5::WinExtras)
-endif(WIN32)
+
+target_include_directories(qbt_gui
+    PRIVATE ../app
+    PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+if (UNIX AND Qt5DBus_FOUND)
+   add_subdirectory(qtnotify)
+   target_link_libraries(qbt_gui PRIVATE qbt_qtnotify)
+endif (UNIX AND Qt5DBus_FOUND)
 
 if (APPLE)
-    target_link_libraries(qbt_gui Qt5::MacExtras)
-endif()
+    target_sources(qbt_gui PRIVATE macutilities.h macutilities.mm)
+    find_package(Qt5 ${requiredQtVersion} REQUIRED COMPONENTS MacExtras)
+    target_link_libraries(qbt_gui PRIVATE Qt5::MacExtras objc)
+endif (APPLE)
+
+if (WIN32 OR APPLE)
+    target_sources(qbt_gui PRIVATE programupdater.h programupdater.cpp)
+endif (WIN32 OR APPLE)
+
+qbt_target_sources(qBittorrent PRIVATE about.qrc)
+
+if(WIN32)
+    find_package(Qt5 ${requiredQtVersion} REQUIRED COMPONENTS WinExtras)
+    target_link_libraries(qbt_gui PRIVATE Qt5::WinExtras)
+endif(WIN32)

src/gui/lineedit/CMakeLists.txt

@@ -1,10 +1,13 @@
-set(QBT_LINEEDIT_SOURCES
+add_library(qbt_lineedit STATIC
 src/lineedit.cpp
+src/lineedit.h
 )
 
-set(QBT_LINEEDIT_HEADERS
-src/lineedit.h
+target_link_libraries(qbt_lineedit
+    PRIVATE
+        qbt_gui_headers
+    PUBLIC
+        Qt5::Widgets
 )
 
-add_library(qbt_lineedit STATIC ${QBT_LINEEDIT_SOURCES} ${QBT_LINEEDIT_HEADERS})
-target_link_libraries(qbt_lineedit Qt5::Widgets)
+target_include_directories(qbt_lineedit PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)

src/gui/powermanagement/CMakeLists.txt

@@ -1,25 +1,20 @@
-set(QBT_POWERMANAGEMENT_HEADERS
+add_library(qbt_powermanagement STATIC
 powermanagement.h
-)
-
-set(QBT_POWERMANAGEMENT_SOURCES
 powermanagement.cpp
 )
 
-if (UNIX AND DBUS)
+target_link_libraries(qbt_powermanagement PUBLIC Qt5::Core)
+set_target_properties(qbt_powermanagement PROPERTIES AUTOUIC False AUTORCC False)
+target_include_directories(qbt_powermanagement PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+if (UNIX AND Qt5DBus_FOUND)
     find_package(X11)
     if (X11_FOUND)
-        list(APPEND QBT_POWERMANAGEMENT_HEADERS powermanagement_x11.h)
-        list(APPEND QBT_POWERMANAGEMENT_SOURCES powermanagement_x11.cpp)
+        target_sources(qbt_powermanagement PRIVATE powermanagement_x11.h powermanagement_x11.cpp)
+        target_link_libraries(qbt_powermanagement PRIVATE Qt5::DBus)
     endif (X11_FOUND)
-endif (UNIX AND DBUS)
+endif (UNIX AND Qt5DBus_FOUND)
 
-add_library(qbt_powermanagement STATIC ${QBT_POWERMANAGEMENT_SOURCES} ${QBT_POWERMANAGEMENT_HEADERS})
-set_target_properties(qbt_powermanagement PROPERTIES AUTOUIC False AUTORCC False)
-target_link_qt_components(qbt_powermanagement Core)
-if (X11_FOUND)
-    target_link_qt_components(qbt_powermanagement DBus)
-endif (X11_FOUND)
 if (WIN32)
-    target_link_libraries(qbt_powermanagement PowrProf)
+    target_link_libraries(qbt_powermanagement PRIVATE PowrProf)
 endif (WIN32)

src/gui/properties/CMakeLists.txt

@@ -1,16 +1,7 @@
-include_directories(
-${CMAKE_CURRENT_BINARY_DIR}
-${CMAKE_CURRENT_SOURCE_DIR}
-../lineedit/src/
-)
-
-set(QBT_PROPERTIES_FORMS
+add_library(qbt_properties STATIC
 propertieswidget.ui
 trackersadditiondlg.ui
 peersadditiondlg.ui
-)
-
-set(QBT_PROPERTIES_HEADERS
 propertieswidget.h
 peerlistwidget.h
 proplistdelegate.h
@@ -25,9 +16,6 @@ pieceavailabilitybar.h
 proptabbar.h
 speedwidget.h
 speedplotview.h
-)
-
-set(QBT_PROPERTIES_SOURCES
 propertieswidget.cpp
 proplistdelegate.cpp
 peerlistwidget.cpp
@@ -42,6 +30,16 @@ speedwidget.cpp
 speedplotview.cpp
 )
 
-add_library(qbt_properties STATIC ${QBT_PROPERTIES_HEADERS} ${QBT_PROPERTIES_SOURCES} ${QBT_PROPERTIES_FORMS})
-target_link_libraries(qbt_properties qbt_base)
-target_link_libraries(qbt_properties Qt5::Widgets)
+target_link_libraries(qbt_properties
+    PRIVATE
+        qbt_gui_headers
+    PUBLIC
+        qbt_base qbt_lineedit Qt5::Widgets
+)
+
+target_include_directories(qbt_properties
+    PRIVATE
+        ${CMAKE_CURRENT_BINARY_DIR}
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+)

src/gui/qtnotify/CMakeLists.txt

@@ -1,11 +1,8 @@
-set(QBT_QTNOTIFY_SOURCES
+add_library(qbt_qtnotify STATIC
 notifications.cpp
-)
-
-set(QBT_QTNOTIFY_HEADERS
 notifications.h
 )
 
-add_library(qbt_qtnotify STATIC ${QBT_QTNOTIFY_SOURCES} ${QBT_QTNOTIFY_HEADERS})
 set_target_properties(qbt_qtnotify PROPERTIES AUTOUIC False AUTORCC False)
-target_link_qt_components(qbt_qtnotify DBus)
+target_link_libraries(qbt_qtnotify PUBLIC Qt5::DBus)
+target_include_directories(qbt_qtnotify PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

src/gui/rss/CMakeLists.txt

@@ -1,26 +1,22 @@
-include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
-
-set(QBT_RSS_HEADERS
+add_library(qbt_rss STATIC
 articlelistwidget.h
 automatedrssdownloader.h
 feedlistwidget.h
 htmlbrowser.h
 rsswidget.h
-)
-
-set(QBT_RSS_SOURCE
 articlelistwidget.cpp
 automatedrssdownloader.cpp
 feedlistwidget.cpp
 htmlbrowser.cpp
 rsswidget.cpp
-)
-
-set(QBT_RSS_FORMS
 automatedrssdownloader.ui
 rsswidget.ui
 )
 
-add_library(qbt_rss STATIC ${QBT_RSS_HEADERS} ${QBT_RSS_SOURCE} ${QBT_RSS_FORMS})
-target_link_libraries(qbt_rss qbt_base)
-target_link_libraries(qbt_rss Qt5::Gui Qt5::Widgets Qt5::Network)
+target_include_directories(qbt_rss PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+target_link_libraries(qbt_rss
+    PRIVATE
+        qbt_gui_headers
+    PUBLIC
+        qbt_base Qt5::Gui Qt5::Widgets Qt5::Network
+)

src/gui/search/CMakeLists.txt

@@ -1,25 +1,13 @@
-include_directories(
-${CMAKE_CURRENT_BINARY_DIR}
-${CMAKE_CURRENT_SOURCE_DIR}/..
-${CMAKE_CURRENT_SOURCE_DIR}/../lineedit/src
-)
-
-set(QBT_SEARCHENGINE_FORMS
+add_library(qbt_searchengine STATIC
 pluginselectdlg.ui
 pluginsourcedlg.ui
 searchwidget.ui
-)
-
-set(QBT_SEARCHENGINE_HEADERS
 pluginselectdlg.h
 pluginsourcedlg.h
 searchlistdelegate.h
 searchsortmodel.h
 searchtab.h
 searchwidget.h
-)
-
-set(QBT_SEARCHENGINE_SOURCES
 pluginselectdlg.cpp
 pluginsourcedlg.cpp
 searchlistdelegate.cpp
@@ -32,6 +20,9 @@ set(QBT_SEARCHENGINE_RESOURCES
 # search.qrc
 )
 
-add_library(qbt_searchengine STATIC ${QBT_SEARCHENGINE_HEADERS} ${QBT_SEARCHENGINE_SOURCES} ${QBT_SEARCHENGINE_RESOURCES} ${QBT_SEARCHENGINE_FORMS})
-target_link_libraries(qbt_searchengine qbt_base)
-
+target_link_libraries(qbt_searchengine
+    PUBLIC
+        qbt_base
+    PRIVATE
+        qbt_lineedit qbt_gui_headers
+)

src/webui/CMakeLists.txt

@@ -1,4 +1,4 @@
-set(QBT_WEBUI_HEADERS
+add_library(qbt_webui STATIC
 api/apicontroller.h
 api/apierror.h
 api/appcontroller.h
@@ -13,9 +13,6 @@ api/serialize/serialize_torrent.h
 extra_translations.h
 webapplication.h
 webui.h
-)
-
-set(QBT_WEBUI_SOURCES
 api/apicontroller.cpp
 api/apierror.cpp
 api/appcontroller.cpp
@@ -30,8 +27,6 @@ webapplication.cpp
 webui.cpp
 )
 
-qbt_target_sources(webui.qrc)
-
-add_library(qbt_webui STATIC ${QBT_WEBUI_HEADERS} ${QBT_WEBUI_SOURCES})
-target_link_libraries(qbt_webui qbt_base)
+qbt_target_sources(qBittorrent PRIVATE webui.qrc)
 
+target_link_libraries(qbt_webui PUBLIC qbt_base)