QtAutogen: Add test for empty qrc file

Tests/QtAutogen/CMakeLists.txt

@@ -44,10 +44,16 @@ else()
 
 endif()
 
+# -- RCC only
 add_executable(rcconly rcconly.cpp second_resource.qrc)
 set_property(TARGET rcconly PROPERTY AUTORCC ON)
 target_link_libraries(rcconly ${QT_QTCORE_TARGET})
 
+# -- RCC empty
+add_executable(rcc_empty rcc_empty.cpp rcc_empty_resource.qrc)
+set_property(TARGET rcc_empty PROPERTY AUTORCC ON)
+target_link_libraries(rcc_empty ${QT_QTCORE_TARGET})
+
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 add_definitions(-DFOO -DSomeDefine="Barx")

Tests/QtAutogen/rcc_empty.cpp

+
+extern int qInitResources_rcc_empty_resource();
+
+int main(int, char**)
+{
+  // Fails to link if the symbol is not present.
+  qInitResources_rcc_empty_resource();
+  return 0;
+}

Tests/QtAutogen/rcc_empty_resource.qrc

+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+</qresource>
+</RCC>