1.\" Copyright (c) 1987, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)mkdep.1 8.1 (Berkeley) 6/6/93 33.\" $FreeBSD: src/usr.bin/mkdep/mkdep.1,v 1.7.2.7 2002/12/29 16:35:40 schweikh Exp $ 34.\" $DragonFly: src/usr.bin/mkdep/mkdep.1,v 1.3 2006/02/17 19:39:09 swildner Exp $ 35.\" 36.Dd June 6, 1993 37.Dt MKDEP 1 38.Os 39.Sh NAME 40.Nm mkdep 41.Nd construct Makefile dependency list 42.Sh SYNOPSIS 43.Nm 44.Op Fl ap 45.Op Fl f Ar file 46.Op Ar flags 47.Ar 48.Sh DESCRIPTION 49The 50.Nm 51utility takes a set of flags for the C compiler and a list 52of C source files as arguments and constructs a set of include 53file dependencies which are written into the file ``.depend''. 54An example of its use in a Makefile might be: 55.Bd -literal -offset indent 56CFLAGS= -O -I../include 57SRCS= file1.c file2.c 58 59depend: 60 mkdep ${CFLAGS} ${SRCS} 61.Ed 62.Pp 63where the macro SRCS is the list of C source files and the macro 64CFLAGS is the list of flags for the C compiler. 65.Pp 66The user has the ability to change the preprocessor and preprocessor options 67used. For instance, to use gcc as the preprocessor and to ignore system 68headers, one would use 69.Bd -literal -offset indent 70depend: 71 env MKDEP_CPP="gcc -E" MKDEP_CPP_OPTS=-MM mkdep \\ 72 ${CFLAGS} ${SRCS} 73.Ed 74.Pp 75The options are as follows: 76.Bl -tag -width Ds 77.It Fl a 78Append to the output file, 79so that multiple 80.Nm Ns 's 81may be run from a single Makefile. 82.It Fl f 83Write the include file dependencies to 84.Ar file , 85instead of the default ``.depend''. 86.It Fl p 87Cause 88.Nm 89to produce dependencies of the form: 90.Bd -literal -offset indent 91program: program.c 92.Ed 93.Pp 94so that subsequent makes will produce 95.Ar program 96directly from its C module rather than using an intermediate 97.Pa \&.o 98module. 99This is useful for programs whose source is contained in a single 100module. 101.El 102.Sh ENVIRONMENT 103.Bl -tag -width MKDEP_CPP_OPTS 104.It Ev CC 105Specifies the C compiler to use. The specified compiler is expected to have 106options consistent with the GNU C compiler. 107.It Ev MKDEP_CPP 108Specifies the preprocessor to use. The default is "${CC} -E". 109.It Ev MKDEP_CPP_OPTS 110Specifies the non-CFLAGS options for the preprocessor. The default is 111"-M". 112.El 113.Sh FILES 114.Bl -tag -width .depend -compact 115.It Pa .depend 116File containing list of dependencies. 117.El 118.Sh SEE ALSO 119.Xr cc 1 , 120.Xr cpp 1 , 121.Xr make 1 122.Sh HISTORY 123The 124.Nm 125command appeared in 126.Bx 4.3 Tahoe . 127