.\" Man page Copyright (c) 2002 .\" Apple Computer .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS DOCUMENTATION IS PROVIDED BY THE APPLE ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL APPLE BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" .Dd "December 25, 2002" .Dt md 1 .Os .Sh NAME .Nm md .Nd process raw dependency files produced by cpp -MD .Sh SYNOPSIS .Nm .Op Fl d .Op Fl f .Op Fl m Ar makefile .Op Fl u Ar makefile .Op Fl o Ar outputfile .Op Fl v .Op Fl x .Op Fl D Ar c|d|m|o|t|D .Sh DESCRIPTION The .Nm command basically does two things: .Pp 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. .Nm canonicalizes and flushes repeats from the dependency list. It also sorts the file names and "fills" them to a 78 character line. .Pp .Nm also updates the makefile directly with the dependency information, so the .d file can be thrown away (see .Ar d option). This is done to save space. .Nm assumes that dependency information in the makefile is sorted by .o file name and it procedes to merge in (add/or replace [as appropriate]) the new dependency lines that it has generated. For time efficiency, .Nm 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 .Op f is given. .Pp .Sh FLAG SUMMARY .Bl -tag -width indent .It Fl D Ar c|D|d|m|o|t Specify debugging option(s): .Bl -tag -width indent .It c show file contents .It D show very low level debugging .It d show new dependency crunching .It m show generation of makefile .It o show files being opened .It t show time comparisons .El .It Fl d Delete the .d file after it is processed .It Fl f Force an update of the dependencies in the makefile, even if the makefile is more recent than the .n file. (This implies that .Nm has been run already.) .It Fl m Ar makefile Specify the makefile to be upgraded. The defaults are .Ar makefile and then .Ar Makefile . .It Fl o Ar outputfile Specify an output file (other than a makefile) for the dependencies. .It Fl u Ar makefile Like .Fl m , but the file will be created if necessary. .It Fl v Set the verbose flag. .It Fl x Expunge old dependency information from the makefile. .El .Sh SEE ALSO .Xr make 1 .Sh BUGS Old, possibly not used by anyone. .Sh HISTORY The .Nm utility was written by Robert V. Baron at Carnegie-Mellon University.