.\" Copyright (c) 1987 Regents of the University of California.
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.\"
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.\" by the University of California, Berkeley.  The name of the
.\" University may not be used to endorse or promote products derived
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.\"	@(#)mkdep.1	5.8 (Berkeley) 10/24/88
.\"
.Dd October 24, 1988
.Dt MKDEP @CMD_EXT_U@
.Os BSD 4
.Sh NAME
.Nm mkdep 
.Nd construct Makefile dependency list
.Sh SYNOPSIS
.Nm mkdep
.Op Fl ap
.Op Fl f Ar depend_file
.Op Ar flags 
.Ar file ...
.Sh DESCRIPTION
.Ic Mkdep
takes a set of flags for the C compiler and a list
of C source files as arguments and constructs a set of 
.Li include
file dependencies which are written into the file 
.Pa depend_file ,
or 
.Dq Pa .depend 
by default.  An example of its use in a 
.Pa Makefile 
might be:
.Bd -literal -offset indent
CFLAGS= -O -DDEBUG -I../include -I.
SRCS= file1.c file2.c

depend:
	mkdep ${CFLAGS} ${SRCS}
.Ed
.Pp
where the macro 
.Dq Li SRCS 
is the list of C source files and the macro
.Dq Li CFLAGS 
is the list of flags for the C compiler.
.Pp
If the 
.Dq Fl p 
option is provided, 
.Ic mkdep 
produces dependencies
of the form 
.Dq Li program: program.c 
so that subsequent calls to 
.Xr make @CMD_EXT@ 
will produce 
.Dq Pa program 
directly from its C module rather than using an intermediate 
.Dq Pa \&.o 
module.  This is useful in directories which
contain many programs, each of whose source is contained in a single
C module.  
.Pp 
The 
.Dq Fl a 
option causes appending to the output file, so that multiple 
.Xo Ic mkdep 
.Ns 's 
.Xc
may be run from a single 
.Pa Makefile .
.Sh SEE ALSO
.Xr cc @CMD_EXT@ , 
.Xr cpp @CMD_EXT@ , 
.Xr make @CMD_EXT@ .