diff --git a/CMakeLists.txt b/CMakeLists.txt
index b442d86..a75fed8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,6 +33,7 @@ option( WITH_ALSA "Enable ALSA support" ON )
 option( WITH_AUDIOFILE "Enable audiofile (wav) support" ON )
 option( WITH_VORBIS "Enable Ogg/Vorbis support" ON )
 option( WITH_MAD "Enable MAD mp3 decoder support" ON )
+option( WITH_GCC_VISIBILITY "Enable fvisibility and fvisibility-inlines-hidden" OFF )
 
 
 ##### paths setup ###############################
@@ -159,6 +160,20 @@ else( GLIB2_FOUND )
 endif( GLIB2_FOUND )
 
 
+##### check for gcc visibility support #########
+# FIXME
+# This should check for [T]Qt3 visibility support
+
+if( WITH_GCC_VISIBILITY )
+ if( NOT UNIX )
+ message(FATAL_ERROR "\ngcc visibility support was requested, but your system is not *NIX" )
+ endif( NOT UNIX )
+ set( __KDE_HAVE_GCC_VISIBILITY 1 )
+ set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
+ set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
+endif( )
+
+
 ##### check for TQt #############################
 
 include( CheckCXXSourceCompiles )
diff --git a/artsc/artsc_export.h.in b/artsc/artsc_export.h.in
index 7a235b9..c7c78e3 100644
--- a/artsc/artsc_export.h.in
+++ b/artsc/artsc_export.h.in
@@ -20,7 +20,9 @@
 #ifndef ARTSC_EXPORT_H
 #define ARTSC_EXPORT_H
 
-#undef __KDE_HAVE_GCC_VISIBILITY
+/* Defined if you have fvisibility and fvisibility-inlines-hidden support. */
+#cmakedefine __KDE_HAVE_GCC_VISIBILITY 1
+
 /**
  * The ARTS_NO_EXPORT macro marks the symbol of the given variable 
  * to be hidden. A hidden symbol is stripped during the linking step, 
diff --git a/config.h.cmake b/config.h.cmake
index ac9dddb..43bdb21 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -1,3 +1,6 @@
+/* Defined if you have fvisibility and fvisibility-inlines-hidden support. */
+#cmakedefine __KDE_HAVE_GCC_VISIBILITY 1
+
 #cmakedefine HAVE_SYS_TIME_H 1
 #cmakedefine TIME_WITH_SYS_TIME 1
 #cmakedefine HAVE_STDIO_H 1
diff --git a/mcop/arts_export.h.in b/mcop/arts_export.h.in
index 075285c..cf10547 100644
--- a/mcop/arts_export.h.in
+++ b/mcop/arts_export.h.in
@@ -20,7 +20,8 @@
 #ifndef ARTS_EXPORT_H
 #define ARTS_EXPORT_H
 
-#undef __KDE_HAVE_GCC_VISIBILITY
+/* Defined if you have fvisibility and fvisibility-inlines-hidden support. */
+#cmakedefine __KDE_HAVE_GCC_VISIBILITY 1
 
 /**
  * The ARTS_NO_EXPORT macro marks the symbol of the given variable