make always builds, part 2

[Edgar]

I can't get my makefile to work correctly. I have an .a file that 
depends on .o files that depend on .d files that depend on an output 
object directory existing. The problem is that the d files always build 
because make says the directory is newer than the d files, but it was 
created 8 days ago, and the d files were just created.

I tried to make a small example of it, but this just has problems of its 
own (doesn't make $(OBJDIRECTORY) or test.d even though they are 
prerequisites of test.o, or at least I think they should be, but if not, 
why not?)


OBJDIRECTORY = build\obj\Dynamic\Release

SRCFILES = test.cpp
OBJFILES = $(SRCFILES:.cpp=.o)
DFILES = $(OBJFILES:.o=.d)

test.exe : $(OBJFILES)
   g++ -o test.exe $(OBJFILES)

%.o : %.cpp %.d
   g++ -c -o $@ $<

.PRECIOUS : %.d
%.d : %.cpp $(OBJDIRECTORY)
   g++ -MM -o $@ $<
  

$(OBJDIRECTORY) :
   mkdir $(OBJDIRECTORY)

restart :
   del test.exe
   del *.o
   del *.d
   -rmdir $(OBJDIRECTORY)

Here is the output :
c:\ctwoplus\progcode\allegro\Eagle\maketest>make
g++    -c -o test.o test.cpp
g++ -o test.exe test.o

c:\ctwoplus\progcode\allegro\Eagle\maketest>make
make: `test.exe' is up to date.

So, can anyone tell me why my library's makefile always says the d files 
are out of date because the directory is newer (even though it is not),
or why this small example makefile doesn't build the d file or make the 
directory?

Thanks,
Edgar