Add static build support

It's possible to build the framework as set of static libraries now.
Use -DBUILD_SHARED_LIBS=OFF to emable static build.

The following libraries will be created:
libKUserFeedbackCore.a
libKUserFeedbackWidgets.a
libKUserFeedbackCommon.a

You have to keep them in order listed above, when linking your app
against them.

src/common/CMakeLists.txt

@@ -33,5 +33,10 @@ add_library(KUserFeedbackCommon STATIC
     ${FLEX_surveytargetexpressionscanner_OUTPUTS}
 )
 
+if (NOT BUILD_SHARED_LIBS)
+    install(TARGETS KUserFeedbackCommon
+            EXPORT KUserFeedbackTargets ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})
+endif()
+
 target_include_directories(KUserFeedbackCommon PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR};${CMAKE_CURRENT_SOURCE_DIR}/..>")
 target_link_libraries(KUserFeedbackCommon LINK_PRIVATE Qt5::Core)

src/provider/core/CMakeLists.txt

@@ -25,7 +25,7 @@ set(userfeedback_core_srcs
     ${userfeedback_core_QM_LOADER}
 )
 
-add_library(KUserFeedbackCore SHARED ${userfeedback_core_srcs})
+add_library(KUserFeedbackCore ${userfeedback_core_srcs})
 set_target_properties(KUserFeedbackCore PROPERTIES
     SOVERSION ${KUSERFEEDBACK_SOVERSION}
     VERSION ${KUSERFEEDBACK_VERSION_STRING}

src/provider/widgets/CMakeLists.txt

@@ -6,7 +6,7 @@ set(userfeedback_widgets_srcs
     auditlogbrowserdialog.cpp
 )
 
-add_library(KUserFeedbackWidgets SHARED ${userfeedback_widgets_srcs})
+add_library(KUserFeedbackWidgets ${userfeedback_widgets_srcs})
 set_target_properties(KUserFeedbackWidgets PROPERTIES
     SOVERSION ${KUSERFEEDBACK_SOVERSION}
     VERSION ${KUSERFEEDBACK_VERSION_STRING}