cmake: fix Qt resources linkage. Closes #5080

Qt resource is innitialized by a static object constructor (see
https://wiki.qt.io/QtResources). When we put resources into a static
library, the linker removes that static objects and thus the resources
themselves. To correct that we append resources to the main executable
sources list. This is done via custom function qbt_target_sources which
knows where to read the executable' name.

cmake/Modules/QbtTargetSources.cmake

@@ -0,0 +1,17 @@
+# a helper function which appends source to the main qBt target
+# the target name is read from QBT_TARGET_NAME variable
+# sources file names are relative to the the ${qbt_executable_SOURCE_DIR}
+
+function (qbt_target_sources)
+    set (_sources_rel "")
+    foreach (_source IN ITEMS ${ARGN})
+        if (IS_ABSOLUTE "${_source}")
+            set(source_abs "${_source}")
+        else()
+            get_filename_component(_source_abs "${_source}" ABSOLUTE)
+        endif()
+        file (RELATIVE_PATH _source_rel "${qbt_executable_SOURCE_DIR}" "${_source_abs}")
+        list (APPEND _sources_rel "${_source_rel}")
+    endforeach()
+    target_sources (${QBT_TARGET_NAME} PRIVATE "${_sources_rel}")
+endfunction (qbt_target_sources)

src/CMakeLists.txt

@@ -3,6 +3,7 @@ set(CMAKE_CXX_STANDARD "11")
 add_definitions(-DBOOST_NO_CXX11_RVALUE_REFERENCES)
 
 include(MacroLinkQtComponents)
+include(QbtTargetSources)
 
 find_package(LibtorrentRasterbar REQUIRED)
 include_directories(SYSTEM ${LibtorrentRasterbar_INCLUDE_DIRS})
@@ -88,8 +89,12 @@ set(QBT_USES_QT5 ${QT5})
 
 configure_file(config.h.cmakein ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 
+if (GUI)
+    set(QBT_TARGET_NAME qbittorrent)
+else (GUI)
+    set(QBT_TARGET_NAME qbittorrent-nox)
+endif (GUI)
 
-add_subdirectory(base)
 
 if (SYSTEM_QTSINGLEAPPLICATION)
     find_package(QtSingleApplication REQUIRED)
@@ -98,6 +103,9 @@ else (SYSTEM_QTSINGLEAPPLICATION)
     include_directories(app/qtsingleapplication)
 endif (SYSTEM_QTSINGLEAPPLICATION)
 
+add_subdirectory(app)
+add_subdirectory(base)
+
 if (GUI)
     add_subdirectory(gui)
 endif (GUI)
@@ -106,4 +114,3 @@ if (WEBUI)
     add_subdirectory(webui)
 endif (WEBUI)
 
-add_subdirectory(app)

src/app/CMakeLists.txt

@@ -1,3 +1,4 @@
+project(qbt_executable)
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 set(QBT_APP_HEADERS
@@ -86,13 +87,10 @@ list(APPEND QBT_APP_HEADERS upgrade.h)
 list(APPEND QBT_TARGET_LIBRARIES qbt_base)
 
 if (GUI)
-    set(QBT_TARGET_NAME qbittorrent)
     list(APPEND QBT_TARGET_LIBRARIES qbt_searchengine qbt_gui)
     include_directories(../gui
         ${CMAKE_CURRENT_BINARY_DIR}/../gui
     )
-else (GUI)
-    set(QBT_TARGET_NAME qbittorrent-nox)
 endif (GUI)
 
 if (WEBUI)
@@ -152,6 +150,7 @@ add_executable(${QBT_TARGET_NAME} ${QBT_APP_HEADERS} ${QBT_APP_SOURCES} ${QBT_QM
 set_target_properties(${QBT_TARGET_NAME}
     PROPERTIES
         AUTOUIC True
+        AUTORCC True
         MACOSX_BUNDLE True
 )
 

src/gui/CMakeLists.txt

@@ -8,6 +8,7 @@ add_subdirectory(properties)
 add_subdirectory(powermanagement)
 add_subdirectory(rss)
 add_subdirectory(search)
+
 if (UNIX AND NOT APPLE AND DBUS)
    add_subdirectory(qtnotify)
    include_directories(qtnotify)
@@ -127,7 +128,7 @@ options.ui
 torrentcreatordlg.ui
 )
 
-set(QBT_GUI_RESOURCES about.qrc)
+qbt_target_sources(about.qrc)
 
-add_library(qbt_gui STATIC ${QBT_GUI_HEADERS} ${QBT_GUI_SOURCES} ${QBT_GUI_RESOURCES})
+add_library(qbt_gui STATIC ${QBT_GUI_HEADERS} ${QBT_GUI_SOURCES})
 target_link_libraries(qbt_gui qbt_lineedit qbt_powermanagement qbt_rss qbt_properties qbt_searchengine ${QBT_GUI_OPTIONAL_LINK_LIBRARIES} qbt_base)

src/gui/lineedit/CMakeLists.txt

@@ -10,9 +10,11 @@ set(QBT_LINEEDIT_RESOURCES
 resources/lineeditimages.qrc
 )
 
-add_library(qbt_lineedit STATIC ${QBT_LINEEDIT_SOURCES} ${QBT_LINEEDIT_HEADERS} ${QBT_LINEEDIT_RESOURCES})
+add_library(qbt_lineedit STATIC ${QBT_LINEEDIT_SOURCES} ${QBT_LINEEDIT_HEADERS})
 if (QT4_FOUND)
     target_link_libraries(qbt_lineedit Qt4::QtGui)
 else (QT4_FOUND)
     target_link_libraries(qbt_lineedit Qt5::Widgets)
 endif (QT4_FOUND)
+
+qbt_target_sources(${QBT_LINEEDIT_RESOURCES})

src/webui/CMakeLists.txt

@@ -26,10 +26,11 @@ if (QT4_FOUND)
     endif(NOT SYSTEM_QJSON)
 endif (QT4_FOUND)
 
-set(QBT_WEBUI_RESOURCES webui.qrc)
-add_library(qbt_webui STATIC ${QBT_WEBUI_HEADERS} ${QBT_WEBUI_SOURCES} ${QBT_WEBUI_RESOURCES})
+qbt_target_sources(webui.qrc)
+
+add_library(qbt_webui STATIC ${QBT_WEBUI_HEADERS} ${QBT_WEBUI_SOURCES})
 target_link_libraries(qbt_webui qbt_base)
 
 if (QT4_FOUND)
-	target_link_libraries(qbt_webui qjson)
+    target_link_libraries(qbt_webui qjson)
 endif (QT4_FOUND)