kde4support problem

[Treeve Jelbert]

I have just build all the split modules, but kde4support gives an error that I 
do not understand

-- Configuring done
CMake Error: INSTALL(EXPORT) given unknown export "kdelibsLibraryTargets"
-- Generating done

the code in question is

install(CODE "set(EXPORT_FILES KDELibs4LibraryTargets.cmake)"
        CODE "set(EXPORT_INSTALL_DIR \"${CMAKECONFIG_INSTALL_DIR}\")"
        SCRIPT 
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/check_installed_exports_file.cmake" 
)
install( EXPORT kdelibsLibraryTargets DESTINATION ${CMAKECONFIG_INSTALL_DIR} 
NAMESPACE ${KDE4_TARGET_PREFIX} FILE KDELibs4LibraryTargets.cmake  COMPONENT 
Devel)