xref: /openbsd-src/usr.bin/mkdep/mkdep.1 (revision 5eacfe93d90d2d1617d754c0cea8fb23ee6534e8)

.\"	$OpenBSD: mkdep.1,v 1.9 2011/07/31 11:17:43 schwarze Exp $
.\"	$NetBSD: mkdep.1,v 1.3 1994/12/23 07:34:56 jtc Exp $
.\"
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.\"     @(#)mkdep.1	8.1 (Berkeley) 6/6/93
.\"
.Dd $Mdocdate: July 31 2011 $
.Dt MKDEP 1
.Os
.Sh NAME
.Nm mkdep
.Nd construct Makefile dependency list
.Sh SYNOPSIS
.Nm mkdep
.Op Fl ap
.Op Fl f Ar file
.Op Ar flags
.Ar
.Sh DESCRIPTION
.Nm
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
.Pa .depend ,
for use by
.Xr make 1 .
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 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 Ar file
Write the include file dependencies to
.Ar file ,
instead of the default
.Pa .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.
.El
.Sh FILES
.Bl -tag -width .depend -compact
.It Pa .depend
file containing list of dependencies
.El
.Sh SEE ALSO
.Xr cc 1 ,
.Xr cpp 1 ,
.Xr make 1
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.3 Tahoe .