diff -ru portage-prefix-2.1.14.orig/pym/portage.py portage-prefix-2.1.14/pym/portage.py
--- portage-prefix-2.1.14.orig/pym/portage.py	2006-06-01 10:57:49.000000000 +0200
+++ portage-prefix-2.1.14/pym/portage.py	2006-06-01 11:05:52.000000000 +0200
@@ -539,6 +539,7 @@
 		"PYTHONPATH"         :{"separator":':', "value":[],"from":"<portage>"},
 		"ADA_INCLUDE_PATH"   :{"separator":':', "value":[],"from":"<portage>"},
 		"ADA_OBJECTS_PATH"   :{"separator":':', "value":[],"from":"<portage>"},
+		"PORTAGE_ENVDUP"     :{"separator":' ', "value":[],"from":"<portage>"},
 	}
 
 	env={}
@@ -552,6 +553,22 @@
 			writemsg("!!! Parsing error in "+str(root)+portage_const.EPREFIX+"/etc/env.d/"+str(x)+"\n")
 			#parse error
 			continue
+
+		# process PORTAGE_ENVDUP
+		if myconfig.has_key("PORTAGE_ENVDUP"):
+			for ed in myconfig["PORTAGE_ENVDUP"].split(" "):
+				if not ed:
+					continue
+				if not myconfig.has_key("PORTAGE_ENVDUP_" + ed):
+					continue
+				if specials.has_key("PORTAGE_ENVDUP_" + ed):
+					continue
+				if myconfig.has_key("PORTAGE_ENVEXT"):
+					myconfig["PORTAGE_ENVEXT"] = myconfig["PORTAGE_ENVEXT"] \
+						+ " " + "PORTAGE_ENVDUP_" + ed
+				else:
+					myconfig["PORTAGE_ENVEXT"] = "PORTAGE_ENVDUP_" + ed
+
 		# process PORTAGE_ENVEXT
 		if myconfig.has_key("PORTAGE_ENVEXT"):
 			for ee in myconfig["PORTAGE_ENVEXT"].split(" "):
@@ -585,6 +602,41 @@
 		for myenv in myconfig.keys():
 			env[myenv]=myconfig[myenv]
 
+	# process PORTAGE_ENVDUP
+	if specials.has_key("PORTAGE_ENVDUP"):
+		for dupvar in specials["PORTAGE_ENVDUP"]["value"]:
+			if not dupvar:
+				continue
+			dupenvvalue = None
+			dupspecvalue = None
+			if env.has_key(dupvar):
+				dupenvvalue=env["PORTAGE_ENVDUP_" + dupvar]
+				del env[dupvar]
+			elif specials.has_key(dupvar):
+				dupspecvalue=specials[dupvar]
+				if dupvar != "LDPATH":
+					del specials[dupvar]
+			else:
+				continue
+
+			for dupto in specials["PORTAGE_ENVDUP_" + dupvar]["value"]:
+				if not dupto:
+					continue
+				if dupenvvalue:
+					if env.has_key(dupto):
+						writemsg("!!! Cannot dup '"+dupvar+"' to '"+dupto
+							+ "', '"+dupto+"' is defined separately.\n");
+						continue
+					env[dupto] = dupenvvalue
+				elif specials.has_key(dupto):
+					specials[dupto] = dupspecvalue
+				else:
+					specials[dupto] = {"separator": sep, "value":[], "from": x}
+					specials[dupto]["separator"] = dupspecvalue["separator"]
+					specials[dupto]["value"].extend(dupspecvalue["value"])
+			del specials["PORTAGE_ENVDUP_" + dupvar]
+		del specials["PORTAGE_ENVDUP"]
+
 	if os.path.exists(root+portage_const.EPREFIX+"/etc/ld.so.conf"):
 		myld=open(root+portage_const.EPREFIX+"/etc/ld.so.conf")
 		myldlines=myld.readlines()