Index: cmake/modules/Compiler.cmake
--- cmake/modules/Compiler.cmake.orig
+++ cmake/modules/Compiler.cmake
@@ -4,9 +4,10 @@ IF ( WIN32 )
 	SET( SYMBOLS_VISIBILITY "" )
 ENDIF ( WIN32 )
 
-IF ( CMAKE_COMPILER_IS_GNUCC ) 
+IF ((CMAKE_COMPILER_IS_GNUCC) OR (CMAKE_C_COMPILER_ID MATCHES "Clang") OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
 	SET( SYMBOLS_VISIBILITY "-fvisibility=hidden" )
-ENDIF ( CMAKE_COMPILER_IS_GNUCC ) 
+ENDIF ((CMAKE_COMPILER_IS_GNUCC) OR (CMAKE_C_COMPILER_ID MATCHES "Clang") OR (CMAKE_CXX_COMPILER_ID MATCHES "
+Clang"))
 
 IF (CMAKE_SYSTEM MATCHES "SunOS-5*.")	
 	SET( SYMBOLS_VISIBILITY "-xldscope=hidden" )