I was seeing various issues with parallel make, mainly due to to what was likely 
partially installed headers. If you change into the source directory and
"NOISY=1 make  ../obj/apt-pkg/sourcelist.opic" in apt-pkg, you'll see it 
doesn't have any dependencies on the headers being installed. This patch
fixes that so things build correctly.

RP 2012/3/19

Upstream-Status: Pending

Index: apt-1.2.24/buildlib/library.mak
===================================================================
--- apt-1.2.24.orig/buildlib/library.mak
+++ apt-1.2.24/buildlib/library.mak
@@ -65,7 +65,7 @@ $(LIB)/lib$(LIBRARY).so.$(MAJOR).$(MINOR
 
 # Compilation rules
 vpath %.cc $(SUBDIRS)
-$(OBJ)/%.opic: %.cc $(LIBRARYDEPENDS)
+$(OBJ)/%.opic: %.cc $(LIBRARYDEPENDS) $($(LOCAL)-HEADERS)
 	echo Compiling $< to $@
 	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXSTD) $(CXXFLAGS) $(PICFLAGS) -o $@ '$(abspath $<)'
 	$(DoDep)