Add gcc visibility option to arts

(cherry picked from commit 4c08c66641)

CMakeLists.txt

@@ -35,6 +35,7 @@ option( WITH_VORBIS "Enable Ogg/Vorbis support" ON )
 option( WITH_MAD "Enable MAD mp3 decoder support" ON )
 option( WITH_ESOUND "Enable ESOUND support" ${WITH_ALL_OPTIONS} )
 option( WITH_JACK "Enable JACK support" ${WITH_ALL_OPTIONS} )
+option( WITH_GCC_VISIBILITY "Enable fvisibility and fvisibility-inlines-hidden" ${WITH_ALL_OPTIONS} )
 
 
 ##### paths setup ###############################
@@ -191,6 +192,20 @@ 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 )

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, 

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

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