--- src/libs/xpcom18a4/Makefile.kmk	2010-12-23 17:39:11.815583515 -0600
+++ src/libs/xpcom18a4/Makefile.kmk	2010-12-23 17:40:50.788739217 -0600
@@ -469,11 +469,10 @@
  libIDL_config_cflags := $(shell $(VBOX_LIBIDL_CONFIG) --cflags)
  libIDL_config_libs   := $(shell $(VBOX_LIBIDL_CONFIG) --libs)
  xpidl_CFLAGS = \
-	$(libIDL_config_cflags)
- xpidl_LDFLAGS = \
-	$(libIDL_config_libs)
- xpidl_LDFLAGS.linux = \
-	$(VBOX_LD_as_needed)
+      $(shell pkg-config --cflags libIDL-2.0)
+ xpidl_LDFLAGS = $(shell pkg-config --libs-only-L libIDL-2.0)
+ xpidl_LIBS.linux = $(shell pkg-config --libs-only-l libIDL-2.0 | sed -e 's/-l//g')
+
 endif
 
 #