md(1) BSD General Commands Manual md(1)

NAME
     mmdd - process raw dependency files produced by cpp -MD

SYNOPSIS
     mmdd [-dd] [-ff] [-mm makefile] [-uu makefile] [-oo outputfile] [-vv] [-xx]
        [-DD c|d|m|o|t|D]

DESCRIPTION
     The mmdd command basically does two things:

     Process the raw dependency files produced by the cpp -MD option.  There
     is one line in the file for every #include encountered, but there are
     repeats and patterns like .../dir1/../dir2 that appear which should
     reduce to .../dir2.  mmdd canonicalizes and flushes repeats from the depen-
     dency list.  It also sorts the file names and "fills" them to a 78 char-
     acter line.

     mmdd also updates the makefile directly with the dependency information, so
     the .d file can be thrown away (see d option).  This is done to save
     space.  mmdd assumes that dependency information in the makefile is sorted
     by .o file name and it procedes to merge in (add/or replace [as appropri-
     ate]) the new dependency lines that it has generated.  For time effe-
     ciency, mmdd assumes that any .d files it is given that were created before
     the creation date of the "makefile" were processed already.  It ignores
     them unless the force flag [f] is given.

FFLLAAGG SSUUMMMMAARRYY
     -dd delete the .d file after it is processed

     -ff force an update of the dependencies in the makefile even though the
     makefile is more recent than the .n file (This implies that mmdd has been
     run already.)

     -mm makefile specify the makefile to be upgraded.  The defaults are
     makefile and then Makefile

     -uu makefile like -m above, but the file will be created if necessary

     -oo outputfile specify an output file for the dependencies other than a
     makefile

     -vv set the verbose flag

     -xx expunge old dependency info from makefile

     -DD c|d|m|o|t|D subswitch for debugging.  can be followed by any of "c",
     "d", "m", "o", "t", "D" meaning:

              c       show file contents
              d       show new dependency crunching
              m       show generation of makefile
              o       show files being opened
              t       show time comparisons
              D       show very low level debugging

SEE ALSO
     make(1)

BUGS
     Old, possibly not used by anyone.

HISTORY
     The mmdd utility was written by Robert V Baron at Carnegie-Mellon Univer-
     sity.

BSD                            December 21, 2019                           BSD