Description of problem:
the dependency file gcc produced a broken file

Version-Release number of selected component (if applicable):
gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)

How reproducible:
consistantly

Steps to Reproduce:
1.create a simple a.c like following
      int a() {}
2. run the following command to compile
   gcc -c -Wp,-MD,a.o.dep -Wp,-MT,a.o -Wp,-MP -o a.o a.c
  
Actual results:
$cat a.o.dep
a.o a.o: a.c

Expected results:
$cat a.o.dep
a.o: a.c


Additional info: