It seems class "BGCCache" is not used in Color.cc:
diff -uNr ../src.org/Color.hh ../src/Color.hh
--- ../src.org/Color.hh Sat Apr 20 22:23:28 2002
+++ ../src/Color.hh Mon May 6 19:30:18 2002
@@ -32,7 +32,6 @@
#include <string>
class BaseDisplay;
-class BGCCache;
class BColor {
public:thanks, SATOH Satoru
