--- omniEvents-2_6_1/config.mk.in       2004-11-16 18:04:42.000000000 -0500
+++ omniEvents-2_6_1.new/config.mk.in   2005-03-29 08:38:08.023579809 -0500
@@ -65,8 +65,12 @@
 ## IDL compiler.
 ##

+ifndef IDL
 IDL         := @IDL@
+endif
+ifndef IDL_COS_DIR
 IDL_COS_DIR := @IDL_COS_DIR@
+endif
 IDLFLAGS     = -bcxx  # <--- backend selection should be omniidl's first option.
 IDLFLAGS    += -Wba -Wbh='.hh' -Wbs='.cc' -Wbd='DynSK.cc' -WbBOA -Wbuse_quotes
 IDLFLAGS    += -I$(IDL_COS_DIR)/COS