CMake: Allow to build with Qt6

CMakeLists.txt

@@ -12,7 +12,8 @@ project(qBittorrent
 set(CMAKE_FIND_PACKAGE_PREFER_CONFIG ON)
 # version requirements - older versions may work, but you are on your own
 set(minBoostVersion 1.65)
-set(minQtVersion 5.15.2)
+set(minQt5Version 5.15.2)
+set(minQt6Version 6.2)
 set(minOpenSSLVersion 1.1.1)
 set(minLibtorrent1Version 1.2.14)
 set(minLibtorrentVersion 2.0.4)
@@ -22,6 +23,7 @@ set(minZlibVersion 1.2.11)
 include(CheckCXXSourceCompiles) # TODO: migrate to CheckSourceCompiles in CMake >= 3.19
 include(FeatureSummary)
 include(FeatureOptionsSetup)
+feature_option(QT6 "Use Qt6" OFF)
 feature_option(STACKTRACE "Enable stacktraces" ON)
 feature_option(GUI "Build GUI application" ON)
 feature_option(WEBUI "Enables built-in HTTP server for headless use" ON)

src/CMakeLists.txt

@@ -43,14 +43,25 @@ set_property(CACHE LibtorrentRasterbar_DIR PROPERTY TYPE PATH)
 find_package(Boost ${minBoostVersion} REQUIRED)
 find_package(OpenSSL ${minOpenSSLVersion} REQUIRED)
 find_package(ZLIB ${minZlibVersion} REQUIRED)
-find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS Core Network Sql Xml LinguistTools)
+if (QT6)
+    find_package(Qt6 ${minQt6Version} REQUIRED COMPONENTS Core Network Sql Xml LinguistTools)
     if (DBUS)
-    find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS DBus)
+        find_package(Qt6 ${minQt6Version} REQUIRED COMPONENTS DBus)
+        set_package_properties(Qt6DBus PROPERTIES
+            DESCRIPTION "Qt6 module for inter-process communication over the D-Bus protocol"
+            PURPOSE "Required by the DBUS feature"
+        )
+    endif()
+else()
+    find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS Core Network Sql Xml LinguistTools)
+    if (DBUS)
+        find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS DBus)
         set_package_properties(Qt5DBus PROPERTIES
             DESCRIPTION "Qt5 module for inter-process communication over the D-Bus protocol"
             PURPOSE "Required by the DBUS feature"
         )
     endif()
+endif()
 
 # automatically call Qt moc, rcc and uic as needed for all targets by default
 set(CMAKE_AUTORCC_OPTIONS --compress 9 --threshold 5)
@@ -68,10 +79,15 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 add_subdirectory(base)
 
 if (GUI)
-    find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS Widgets Svg)
+    if (QT6)
+        find_package(Qt6 ${minQt6Version} REQUIRED COMPONENTS Widgets Svg)
+    else()
+        find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS Widgets Svg)
         if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
-        find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS WinExtras)
+            find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS WinExtras)
         endif()
+    endif()
+
     add_subdirectory(gui)
 endif()
 

src/app/CMakeLists.txt

@@ -4,14 +4,14 @@
 # Based on https://gist.github.com/giraldeau/546ba5512a74dfe9d8ea0862d66db412
 file(GLOB QBT_TS_FILES "${qBittorrent_SOURCE_DIR}/src/lang/*.ts")
 set_source_files_properties(${QBT_TS_FILES} PROPERTIES OUTPUT_LOCATION "${qBittorrent_BINARY_DIR}/src/lang")
-qt5_add_translation(QBT_QM_FILES ${QBT_TS_FILES} OPTIONS -silent)
+qt_add_translation(QBT_QM_FILES ${QBT_TS_FILES} OPTIONS -silent)
 configure_file("${qBittorrent_SOURCE_DIR}/src/lang/lang.qrc" "${qBittorrent_BINARY_DIR}/src/lang/lang.qrc" COPYONLY)
 
 if (WEBUI)
     file(GLOB QBT_WEBUI_TS_FILES "${qBittorrent_SOURCE_DIR}/src/webui/www/translations/*.ts")
     set_source_files_properties(${QBT_WEBUI_TS_FILES}
         PROPERTIES OUTPUT_LOCATION "${qBittorrent_BINARY_DIR}/src/webui/www/translations")
-    qt5_add_translation(QBT_WEBUI_QM_FILES ${QBT_WEBUI_TS_FILES} OPTIONS -silent)
+    qt_add_translation(QBT_WEBUI_QM_FILES ${QBT_WEBUI_TS_FILES} OPTIONS -silent)
     configure_file("${qBittorrent_SOURCE_DIR}/src/webui/www/translations/webui_translations.qrc"
         "${qBittorrent_BINARY_DIR}/src/webui/www/translations/webui_translations.qrc" COPYONLY)
 endif()
@@ -139,7 +139,7 @@ endif()
 if (GUI)
     target_link_libraries(qbt_app PRIVATE qbt_gui)
     if ((CMAKE_SYSTEM_NAME STREQUAL "Windows") OR (CMAKE_SYSTEM_NAME STREQUAL "Darwin"))
-        qt_import_plugins(qbt_app INCLUDE Qt5::QSvgIconPlugin Qt5::QSvgPlugin)
+        qt_import_plugins(qbt_app INCLUDE Qt::QSvgIconPlugin Qt::QSvgPlugin)
     endif()
 endif()
 

src/base/CMakeLists.txt

@@ -177,7 +177,7 @@ target_link_libraries(qbt_base
         ZLIB::ZLIB
     PUBLIC
         LibtorrentRasterbar::torrent-rasterbar
-        Qt5::Core Qt5::Network Qt5::Sql Qt5::Xml
+        Qt::Core Qt::Network Qt::Sql Qt::Xml
         qbt_common_cfg
 )
 
@@ -204,5 +204,5 @@ if (NOT WEBUI)
 endif()
 
 if (DBUS)
-    target_link_libraries(qbt_base PUBLIC Qt5::DBus)
+    target_link_libraries(qbt_base PUBLIC Qt::DBus)
 endif()

src/gui/CMakeLists.txt

@@ -199,7 +199,7 @@ target_link_libraries(qbt_gui
     PRIVATE
         qbt_base
     PUBLIC
-        Qt5::Gui Qt5::Widgets
+        Qt::Gui Qt::Widgets
 )
 
 if (DBUS)
@@ -219,10 +219,10 @@ if ((CMAKE_SYSTEM_NAME STREQUAL "Windows") OR (CMAKE_SYSTEM_NAME STREQUAL "Darwi
 endif()
 
 if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
-    target_link_libraries(qbt_gui PRIVATE
+    target_link_libraries(qbt_gui PRIVATE PowrProf)
-        Qt5::WinExtras
+    if (NOT QT6)
-        PowrProf
+        target_link_libraries(qbt_gui PRIVATE Qt5::WinExtras)
-    )
+    endif()
 endif()
 
 if (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
@@ -230,7 +230,5 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
         macutilities.h
         macutilities.mm
     )
-    target_link_libraries(qbt_gui PRIVATE
+    target_link_libraries(qbt_gui PRIVATE objc)
-        objc
-    )
 endif()