[Bug fortran/47720] problems with makefile dependency generation using -M

[kristopher.kuhlman at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47720

--- Comment #2 from Kris <kristopher.kuhlman at gmail dot com> 2011-05-25 19:36:48 UTC ---
(In reply to comment #1)
> May I ask what version of gfortran this is? (Trunk build of gfortran from
> yesterday is a bit ambiguous) 

I was using a build of gfortran from CVS 2/12/2011.

> The reason I ask is that I am not getting as far as you. on gfortran 4.6.0 if
> have a program which uses two modules and dependency listing I get is myprog.0:
> myprog.f90 which is less than helpful.

Using a more recent trunk build (sometime last week), I still get what I
originally posted.

$ gfortran-4.7 -cpp -M makegen?.f90
makegen1.o constants.mod: makegen1.f90
makegen2.o utility.mod: makegen2.f90 constants.mod constants.mod \
 constants.mod

If it is considered to be ok that there is all this duplication, then I guess I
don't have a problem.  Maybe the documentation for this feature could be
cleared up to mention this too?