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. 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.\" 30.Dd October 23, 2015 31.Dt MKDEP 1 32.Os 33.Sh NAME 34.Nm mkdep 35.Nd construct Makefile dependency list 36.Sh SYNOPSIS 37.Nm 38.Op Fl ap 39.Op Fl f Ar file 40.Op Ar flags 41.Ar 42.Sh DESCRIPTION 43The 44.Nm 45utility takes a set of flags for the C compiler and a list 46of C source files as arguments and constructs a set of include 47file dependencies which are written into the file ``.depend''. 48An example of its use in a Makefile might be: 49.Bd -literal -offset indent 50CFLAGS= -O -I../include 51SRCS= file1.c file2.c 52 53depend: 54 mkdep ${CFLAGS} ${SRCS} 55.Ed 56.Pp 57where the macro SRCS is the list of C source files and the macro 58CFLAGS is the list of flags for the C compiler. 59.Pp 60The user has the ability to change the preprocessor and preprocessor options 61used. 62For instance, to use 63.Sy cc 64as the preprocessor and to ignore system 65headers, one would use 66.Bd -literal -offset indent 67depend: 68 env MKDEP_CPP="cc -E" MKDEP_CPP_OPTS=-MM mkdep \\ 69 ${CFLAGS} ${SRCS} 70.Ed 71.Pp 72The options are as follows: 73.Bl -tag -width Ds 74.It Fl a 75Append to the output file, 76so that multiple 77.Nm Ns 's 78may be run from a single Makefile. 79.It Fl f 80Write the include file dependencies to 81.Ar file , 82instead of the default ``.depend''. 83.It Fl p 84Cause 85.Nm 86to produce dependencies of the form: 87.Bd -literal -offset indent 88program: program.c 89.Ed 90.Pp 91so that subsequent makes will produce 92.Ar program 93directly from its C module rather than using an intermediate 94.Pa \&.o 95module. 96This is useful for programs whose source is contained in a single 97module. 98.El 99.Sh ENVIRONMENT 100.Bl -tag -width MKDEP_CPP_OPTS 101.It Ev CC 102Specifies the C compiler to use. 103The specified compiler is expected to have 104options consistent with the GNU C compiler. 105The default is 106.Sy cc . 107.It Ev MKDEP_CPP 108Specifies the preprocessor to use. 109The default is "${CC} -E". 110.It Ev MKDEP_CPP_OPTS 111Specifies the non-CFLAGS options for the preprocessor. 112The default is 113"-M". 114.El 115.Sh FILES 116.Bl -tag -width .depend -compact 117.It Pa .depend 118File containing list of dependencies. 119.El 120.Sh SEE ALSO 121.Xr cc 1 , 122.Xr cpp 1 , 123.Xr make 1 124.Sh HISTORY 125The 126.Nm 127command appeared in 128.Bx 4.3 Tahoe . 129