add basic cmake support

src/gui/powermanagement/CMakeLists.txt

@@ -0,0 +1,25 @@
+set(QBT_POWERMANAGEMENT_HEADERS
+powermanagement.h
+)
+
+set(QBT_POWERMANAGEMENT_SOURCES
+powermanagement.cpp
+)
+
+if (UNIX AND DBUS)
+    find_package(X11)
+    if (X11_FOUND)
+        list(APPEND QBT_POWERMANAGEMENT_HEADERS powermanagement_x11.h)
+        list(APPEND QBT_POWERMANAGEMENT_SOURCES powermanagement_x11.cpp)
+    endif (X11_FOUND)
+endif (UNIX AND DBUS)
+
+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)
+endif (WIN32)