diff --git a/CMakeLists.txt b/CMakeLists.txt
index 55cd43c52..3ca140286 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -505,6 +505,15 @@ endif( KDESU_BACKEND-NOTFOUND )
 
 #### set some constants #########################
 
+if( NOT "${KDEDIR}" )
+  if( DEFINED ENV{KDEDIR} )
+    set( KDEDIR "$ENV{KDEDIR}" )
+  else( )
+    set( KDEDIR "${CMAKE_INSTALL_PREFIX}" )
+  endif( )
+endif( )
+set( KDE_COMPILER_VERSION "${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}" )
+set( KDE_COMPILING_OS "${CMAKE_SYSTEM_NAME}" )
 set( LTDL_OBJDIR \".\" )
 set( KDELIBSUFF "${LIB_SUFFIX}" )
 set( kde_socklen_t socklen_t )