4 files changed, 7 insertions, 4 deletions
diff --git a/include/GL/gl.h b/include/GL/gl.h
index f910c3221aa..1426df481c2 100644
--- a/include/GL/gl.h
+++ b/include/GL/gl.h
@@ -62,6 +62,9 @@
 #elif defined(__CYGWIN__) && defined(USE_OPENGL32) /* use native windows opengl32 */
 #  define GLAPI extern
 #  define GLAPIENTRY __stdcall
+#elif defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 303
+#  define GLAPI __attribute__((visibility("default")))
+#  define GLAPIENTRY
 #endif /* WIN32 && !CYGWIN */
 
 #if (defined(__BEOS__) && defined(__POWERPC__)) || defined(__QUICKDRAW__)
diff --git a/include/GL/glut.h b/include/GL/glut.h
index c1b78aa4e59..2e5be8a77c2 100644
--- a/include/GL/glut.h
+++ b/include/GL/glut.h
@@ -193,7 +193,7 @@ WGLAPI int   GLAPIENTRY SetPixelFormat(HDC,int,const PIXELFORMATDESCRIPTOR *);
 #else /* _WIN32 not defined */
 
 /* Define GLUTAPIENTRY and GLUTCALLBACK to nothing if we aren't on Win32. */
-#  define GLUTAPIENTRY
+#  define GLUTAPIENTRY GLAPI
 #  define GLUTAPIENTRYV
 #  define GLUT_APIENTRY_DEFINED
 #  define GLUTCALLBACK
diff --git a/src/glw/GLwDrawA.h b/src/glw/GLwDrawA.h
index a62852c260f..4a381ac38cc 100644
--- a/src/glw/GLwDrawA.h
+++ b/src/glw/GLwDrawA.h
@@ -182,9 +182,9 @@ extern void GLwDrawingAreaSwapBuffers(Widget w);
 
 #ifdef __GLX_MOTIF
 #ifdef _NO_PROTO
-extern Widget GLwCreateMDrawingArea();
+GLAPI extern Widget GLwCreateMDrawingArea();
 #else
-extern Widget GLwCreateMDrawingArea(Widget parent,char *name,ArgList arglist,Cardinal argcount);
+GLAPI extern Widget GLwCreateMDrawingArea(Widget parent,char *name,ArgList arglist,Cardinal argcount);
 #endif
 #endif 
 
diff --git a/src/glw/GLwDrawAP.h b/src/glw/GLwDrawAP.h
index f1217019541..031531b7e6e 100644
--- a/src/glw/GLwDrawAP.h
+++ b/src/glw/GLwDrawAP.h
@@ -59,7 +59,7 @@ typedef struct _GLwMDrawingAreaClassRec {
   } GLwMDrawingAreaClassRec;
 
 
-extern GLwMDrawingAreaClassRec glwMDrawingAreaClassRec;
+GLAPI extern GLwMDrawingAreaClassRec glwMDrawingAreaClassRec;
 
 
 /* XT */