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