You need to make clean first in the usr.bin/file directory.
Then, do make all again in the directory.  Because, the make
file is something like this:

  magic:          $(MAGFILES)
          cat $(MAGFILES) > $(.TARGET)
          $(.OBJDIR)/$(PROG) -C -m $(.TARGET)

Maybe, this should be something like this:

  magic:          $(MAGFILES)
          cat $(MAGFILES) > $(.TARGET)
  magic.mgc:      magic
          $(.OBJDIR)/$(PROG) -C -m $(.TARGET)


   On Mar 28, 23:36, Antti Kantee wrote:
   > Subject: Re: file magic.mgc
   > On Wed Mar 28 2001 at 18:29:12 +0100, Patrick Welche wrote:
   > > So where can I find magic.mgc?
   > 
   > It's made during the build process, just magic itself. Run `make all' to
   > find it.

Regards,
-- Kazushi
The shortest distance between two points is under construction.
		-- Noelie Alito