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.\" Copyright (c) 1987, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" 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.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
.\"
.\" @(#)mkdep.1 8.1 (Berkeley) 6/6/93
.\" $FreeBSD$
.\"
.Dd June 6, 1993
.Dt MKDEP 1
.Os BSD 4.2
.Sh NAME
.Nm mkdep
.Nd construct Makefile dependency list
.Sh SYNOPSIS
.Nm
.Op Fl ap
.Op Fl f Ar file
.Op Ar flags
.Ar file ...
.Sh DESCRIPTION
.Nm Mkdep
takes a set of flags for the C compiler and a list
of C source files as arguments and constructs a set of include
file dependencies which are written into the file ``.depend''.
An example of its use in a Makefile might be:
.Bd -literal -offset indent
CFLAGS= -O -I../include
SRCS= file1.c file2.c
depend:
mkdep ${CFLAGS} ${SRCS}
.Ed
.Pp
where the macro SRCS is the list of C source files and the macro
CFLAGS is the list of flags for the C compiler.
.Pp
The user has the ability to change the preprocessor and preprocessor options
used. For instance, to use Gcc as the preprocessor and to ignore system
headers, one would use
.Bd -literal -offset indent
depend:
env MKDEP_CPP="gcc -E" MKDEP_CPP_OPTS=-MM mkdep \\
${CFLAGS} ${SRCS}
.Ed
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl a
Append to the output file,
so that multiple
.Nm mkdep Ns 's
may be run from a single Makefile.
.It Fl f
Write the include file dependencies to
.Ar file ,
instead of the default ``.depend''.
.It Fl p
Cause
.Nm
to produce dependencies of the form:
.Bd -literal -offset indent
program: program.c
.Ed
.Pp
so that subsequent makes will produce
.Ar program
directly from its C module rather than using an intermediate
.Pa \&.o
module.
This is useful for programs whose source is contained in a single
module.
.Sh ENVIRONMENT
.Bl -tag -width MKDEP_CPP_OPTS
.It Ev CC
Specifies the C compiler to use. The specified compiler is expected to have
options consistant with the Gnu C compiler.
.It Ev MKDEP_CPP
Specifies the preprocessor to use. The default is "${CC} -E".
.It Ev MKDEP_CPP_OPTS
Specifie the non-CFLAGS options for the preprocessor. The default is
"-M".
.El
.Sh SEE ALSO
.Xr cc 1 ,
.Xr cpp 1 ,
.Xr make 1
.Sh FILES
.Bl -tag -width .depend -compact
.It Pa .depend
File containing list of dependencies.
.El
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.3 Tahoe .
|
