885 lines
23 KiB
Groff
885 lines
23 KiB
Groff
.\" Copyright (c) 1990 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)make.1 5.7 (Berkeley) 7/24/91
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.\" $Id: make.1,v 1.7 1995/01/23 20:34:59 mycroft Exp $
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.\"
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.Dd July 24, 1991
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.Dt MAKE 1
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.Os
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.Sh NAME
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.Nm make
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.Nd maintain program dependencies
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.Sh SYNOPSIS
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.Nm make
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.Op Fl eiknqrstv
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.Op Fl D Ar variable
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.Op Fl d Ar flags
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.Op Fl f Ar makefile
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.Op Fl I Ar directory
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.Bk -words
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.Op Fl j Ar max_jobs
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.Ek
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.Op Ar variable=value
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.Op Ar target ...
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.Sh DESCRIPTION
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.Nm Make
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is a program designed to simplify the maintenance of other programs.
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Its input is a list of specifications as to the files upon which programs
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and other files depend.
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If the file
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.Ql Pa makefile
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exists, it is read for this list of specifications.
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If it does not exist, the file
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.Ql Pa Makefile
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|
is read.
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If the file
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.Ql Pa .depend
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exists, it is read (see
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.Xr mkdep 1) .
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.Pp
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This manual page is intended as a reference document only.
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For a more thorough description of
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.Nm make
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and makefiles, please refer to
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.%T "Make \- A Tutorial" .
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl D Ar variable
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Define Ar variable
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to be 1, in the global context.
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.It Fl d Ar flags
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|
Turn on debugging, and specify which portions of
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.Nm make
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are to print debugging information.
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.Ar Flags
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is one or more of the following:
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.Bl -tag -width Ds
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.It Ar A
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Print all possible debugging information;
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|
equivalent to specifying all of the debugging flags.
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.It Ar a
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Print debugging information about archive searching and caching.
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.It Ar c
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Print debugging information about conditional evaluation.
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.It Ar d
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Print debugging information about directory searching and caching.
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.It Ar "g1"
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|
Print the input graph before making anything.
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.It Ar "g2"
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Print the input graph after making everything, or before exiting
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on error.
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.It Ar j
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Print debugging information about running multiple shells.
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.It Ar m
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Print debugging information about making targets, including modification
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dates.
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.It Ar s
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Print debugging information about suffix-transformation rules.
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.It Ar t
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Print debugging information about target list maintenance.
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.It Ar v
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Print debugging information about variable assignment.
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.El
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.It Fl e
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Specify that environmental variables override macro assignments within
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makefiles.
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.It Fl f Ar makefile
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Specify a makefile to read instead of the default
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.Ql Pa makefile
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and
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.Ql Pa Makefile .
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If
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.Ar makefile
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is
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.Ql Fl ,
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standard input is read.
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Multiple makefile's may be specified, and are read in the order specified.
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.It Fl I Ar directory
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Specify a directory in which to search for makefiles and included makefiles.
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The system makefile directory is automatically included as part of this
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list.
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.It Fl i
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Ignore non-zero exit of shell commands in the makefile.
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Equivalent to specifying
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.Ql Fl
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before each command line in the makefile.
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.It Fl j Ar max_jobs
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Specify the maximum number of jobs that
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.Nm make
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may have running at any one time.
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.It Fl k
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Continue processing after errors are encountered, but only on those targets
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that do not depend on the target whose creation caused the error.
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.It Fl n
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Display the commands that would have been executed, but do not actually
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execute them.
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.It Fl q
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Do not execute any commands, but exit 0 if the specified targets are
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up-to-date and 1, otherwise.
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.It Fl r
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Do not use the built-in rules specified in the system makefile.
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.It Fl s
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Do not echo any commands as they are executed.
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Equivalent to specifying
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.Ql Ic @
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before each command line in the makefile.
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.It Fl t
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Rather than re-building a target as specified in the makefile, create it
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or update its modification time to make it appear up-to-date.
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.It Ar variable=value
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Set the value of the variable
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.Ar variable
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to
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.Ar value .
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.El
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.Pp
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There are seven different types of lines in a makefile: file dependency
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specifications, shell commands, variable assignments, include statements,
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conditional directives, for loops, and comments.
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.Pp
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In general, lines may be continued from one line to the next by ending
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them with a backslash
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.Pq Ql \e .
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The trailing newline character and initial whitespace on the following
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line are compressed into a single space.
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.Sh FILE DEPENDENCY SPECIFICATIONS
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Dependency lines consist of one or more targets, an operator, and zero
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or more sources.
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This creates a relationship where the targets ``depend'' on the sources
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and are usually created from them.
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The exact relationship between the target and the source is determined
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by the operator that separates them.
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The three operators are as follows:
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.Bl -tag -width flag
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.It Ic \&:
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A target is considered out-of-date if its modification time is less than
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those of any of its sources.
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Sources for a target accumulate over dependency lines when this operator
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is used.
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The target is removed if
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.Nm make
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is interrupted.
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.It Ic \&!
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Targets are always re-created, but not until all sources have been
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examined and re-created as necessary.
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Sources for a target accumulate over dependency lines when this operator
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is used.
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The target is removed if
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.Nm make
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is interrupted.
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.It Ic \&::
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If no sources are specified, the target is always re-created.
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Otherwise, a target is considered out-of-date if any of its sources has
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been modified more recently than the target.
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|
Sources for a target do not accumulate over dependency lines when this
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operator is used.
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The target will not be removed if
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.Nm make
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is interrupted.
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.El
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.Pp
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Targets and sources may contain the shell wildcard values
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.Ql ? ,
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.Ql * ,
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.Ql []
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and
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.Ql {} .
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The values
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.Ql ? ,
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.Ql *
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and
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.Ql []
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may only be used as part of the final
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component of the target or source, and must be used to describe existing
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files.
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The value
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.Ql {}
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need not necessarily be used to describe existing files.
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Expansion is in directory order, not alphabetically as done in the shell.
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.Sh SHELL COMMANDS
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Each target may have associated with it a series of shell commands, normally
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used to create the target.
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Each of the commands in this script
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.Em must
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be preceded by a tab.
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While any target may appear on a dependency line, only one of these
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dependencies may be followed by a creation script, unless the
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.Ql Ic ::
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operator is used.
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.Pp
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If the first or first two characters of the command line are
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.Ql Ic @
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and/or
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.Ql Ic \- ,
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the command is treated specially.
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A
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.Ql Ic @
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causes the command not to be echoed before it is executed.
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A
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.Ql Ic \-
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causes any non-zero exit status of the command line to be ignored.
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.Sh VARIABLE ASSIGNMENTS
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Variables in make are much like variables in the shell, and, by tradition,
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consist of all upper-case letters.
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The five operators that can be used to assign values to variables are as
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follows:
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.Bl -tag -width Ds
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.It Ic \&=
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Assign the value to the variable.
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Any previous value is overridden.
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.It Ic \&+=
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Append the value to the current value of the variable.
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.It Ic \&?=
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Assign the value to the variable if it is not already defined.
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.It Ic \&:=
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Assign with expansion, i.e. expand the value before assigning it
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to the variable.
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Normally, expansion is not done until the variable is referenced.
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.It Ic \&!=
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Expand the value and pass it to the shell for execution and assign
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the result to the variable.
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Any newlines in the result are replaced with spaces.
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.El
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.Pp
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Any white-space before the assigned
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.Ar value
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is removed; if the value is being appended, a single space is inserted
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between the previous contents of the variable and the appended value.
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.Pp
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|
Variables are expanded by surrounding the variable name with either
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curly braces
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.Pq Ql {}
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or parentheses
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|
.Pq Ql ()
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|
and preceding it with
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a dollar sign
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.Pq Ql \&$ .
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If the variable name contains only a single letter, the surrounding
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braces or parentheses are not required.
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This shorter form is not recommended.
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.Pp
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Variable substitution occurs at two distinct times, depending on where
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the variable is being used.
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Variables in dependency lines are expanded as the line is read.
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Variables in shell commands are expanded when the shell command is
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executed.
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.Pp
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The four different classes of variables (in order of increasing precedence)
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are:
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.Bl -tag -width Ds
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.It Environment variables
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Variables defined as part of
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.Nm make Ns 's
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environment.
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.It Global variables
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Variables defined in the makefile or in included makefiles.
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.It Command line variables
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Variables defined as part of the command line.
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.It Local variables
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Variables that are defined specific to a certain target.
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The seven local variables are as follows:
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.Bl -tag -width ".ARCHIVE"
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.It Va .ALLSRC
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The list of all sources for this target; also known as
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.Ql Va \&> .
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.It Va .ARCHIVE
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The name of the archive file.
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.It Va .IMPSRC
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The name/path of the source from which the target is to be transformed
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(the ``implied'' source); also known as
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.Ql Va \&< .
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.It Va .MEMBER
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The name of the archive member.
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.It Va .OODATE
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The list of sources for this target that were deemed out-of-date; also
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known as
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.Ql Va \&? .
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.It Va .PREFIX
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The file prefix of the file, containing only the file portion, no suffix
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or preceding directory components; also known as
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.Ql Va * .
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.It Va .TARGET
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The name of the target; also known as
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.Ql Va @ .
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.El
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.Pp
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The shorter forms
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.Ql Va @ ,
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.Ql Va ? ,
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.Ql Va \&>
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and
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.Ql Va *
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are permitted for backward
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compatibility with historical makefiles and are not recommended.
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The six variables
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.Ql Va "@F" ,
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.Ql Va "@D" ,
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.Ql Va "<F" ,
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.Ql Va "<D" ,
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.Ql Va "*F"
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and
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.Ql Va "*D"
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are
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permitted for compatibility with
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.At V
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makefiles and are not recommended.
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.Pp
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Four of the local variables may be used in sources on dependency lines
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because they expand to the proper value for each target on the line.
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These variables are
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.Ql Va .TARGET ,
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.Ql Va .PREFIX ,
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.Ql Va .ARCHIVE ,
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and
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.Ql Va .MEMBER .
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.Pp
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In addition,
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.Nm make
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sets or knows about the following variables:
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.Bl -tag -width MAKEFLAGS
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.It Va \&$
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A single dollar sign
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.Ql \&$ ,
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i.e.
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.Ql \&$$
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expands to a single dollar
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sign.
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.It Va .MAKE
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The name that
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.Nm make
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was executed with
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.Pq Va argv Op 0
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.It Va .CURDIR
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A path to the directory where
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.Nm make
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was executed.
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.It Va .OBJDIR
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A path to the directory where the targets are built.
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.It Ev MAKEFLAGS
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The environment variable
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.Ql Ev MAKEFLAGS
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may contain anything that
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may be specified on
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.Nm make Ns 's
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command line.
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Anything specified on
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.Nm make Ns 's
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command line is appended to the
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.Ql Ev MAKEFLAGS
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variable which is then
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entered into the environment for all programs which
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.Nm make
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executes.
|
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.El
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.Pp
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|
Variable expansion may be modified to select or modify each word of the
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variable (where a ``word'' is white-space delimited sequence of characters).
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|
The general format of a variable expansion is as follows:
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|
.Pp
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|
.Dl {variable[:modifier[:...]]}
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.Pp
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|
Each modifier begins with a colon and one of the following
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|
special characters.
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The colon may be escaped with a backslash
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|
.Pq Ql \e .
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.Bl -tag -width Cm E\&
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.It Cm E
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Replaces each word in the variable with its suffix.
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.It Cm H
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Replaces each word in the variable with everything but the last component.
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.It Cm M Ns Ar pattern
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|
Select only those words that match the rest of the modifier.
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|
The standard shell wildcard characters
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.Pf ( Ql * ,
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.Ql ? ,
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and
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.Ql Op )
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may
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be used.
|
|
The wildcard characters may be escaped with a backslash
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.Pq Ql \e .
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.It Cm N Ns Ar pattern
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This is identical to
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.Ql Cm M ,
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but selects all words which do not match
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the rest of the modifier.
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.It Cm R
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Replaces each word in the variable with everything but its suffix.
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|
.Sm off
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.It Cm S No \&/ Ar old_pattern Xo
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.No \&/ Ar new_pattern
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.No \&/ Op Cm g
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.Xc
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|
.Sm on
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|
Modify the first occurrence of
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.Ar old_pattern
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|
in each word to be replaced with
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|
.Ar new_pattern .
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|
If a
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.Ql g
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|
is appended to the last slash of the pattern, all occurrences
|
|
in each word are replaced.
|
|
If
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|
.Ar old_pattern
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|
begins with a carat
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|
.Pq Ql ^ ,
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|
.Ar old_pattern
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|
is anchored at the beginning of each word.
|
|
If
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|
.Ar old_pattern
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|
ends with a dollar sign
|
|
.Pq Ql \&$ ,
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|
it is anchored at the end of each word.
|
|
Inside
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|
.Ar new_string ,
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|
an ampersand
|
|
.Pq Ql &
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|
is replaced by
|
|
.Ar old_pattern .
|
|
Any character may be used as a delimiter for the parts of the modifier
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string.
|
|
The anchoring, ampersand and delimiter characters may be escaped with a
|
|
backslash
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|
.Pq Ql \e .
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|
.Pp
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|
Variable expansion occurs in the normal fashion inside both
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.Ar old_string
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|
and
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|
.Ar new_string
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|
with the single exception that a backslash is used to prevent the expansion
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|
of a dollar sign
|
|
.Pq Ql \&$
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|
not a preceding dollar sign as is usual.
|
|
.It Cm T
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|
Replaces each word in the variable with its last component.
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|
.It Ar old_string=new_string
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|
This is the
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|
.At V
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|
style variable substitution.
|
|
It must be the last modifier specified.
|
|
If
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|
.Ar old_string
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|
or
|
|
.Ar new_string
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|
do not contain the pattern matching character
|
|
.Ar %
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|
then it is assumed that they are
|
|
anchored at the end of each word, so only suffixes or entire
|
|
words may be replaced. Otherwise
|
|
.Ar %
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|
is the substring of
|
|
.Ar old_string
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|
to be replaced in
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|
.Ar new_string
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|
.El
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|
.Sh INCLUDE STATEMENTS, CONDITIONALS AND FOR LOOPS
|
|
Makefile inclusion, conditional structures and for loops reminiscent
|
|
of the C programming language are provided in
|
|
.Nm make .
|
|
All such structures are identified by a line beginning with a single
|
|
dot
|
|
.Pq Ql \&.
|
|
character.
|
|
Files are included with either
|
|
.Ql .include <file>
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|
or
|
|
.Ql .include \*qfile\*q .
|
|
Variables between the angle brackets or double quotes are expanded
|
|
to form the file name.
|
|
If angle brackets are used, the included makefile is expected to be in
|
|
the system makefile directory.
|
|
If double quotes are used, the including makefile's directory and any
|
|
directories specified using the
|
|
.Fl I
|
|
option are searched before the system
|
|
makefile directory.
|
|
.Pp
|
|
Conditional expressions are also preceded by a single dot as the first
|
|
character of a line.
|
|
The possible conditionals are as follows:
|
|
.Bl -tag -width Ds
|
|
.It Ic .undef Ar variable
|
|
Un-define the specified global variable.
|
|
Only global variables may be un-defined.
|
|
.It Xo
|
|
.Ic \&.if
|
|
.Oo \&! Oc Ns Ar expression
|
|
.Op Ar operator expression ...
|
|
.Xc
|
|
Test the value of an expression.
|
|
.It Xo
|
|
.Ic .ifdef
|
|
.Oo \&! Oc Ns Ar variable
|
|
.Op Ar operator variable ...
|
|
.Xc
|
|
Test the value of a variable.
|
|
.It Xo
|
|
.Ic .ifndef
|
|
.Oo \&! Oc Ns Ar variable
|
|
.Op Ar operator variable ...
|
|
.Xc
|
|
Test the value of a variable.
|
|
.It Xo
|
|
.Ic .ifmake
|
|
.Oo \&! Oc Ns Ar target
|
|
.Op Ar operator target ...
|
|
.Xc
|
|
Test the target being built.
|
|
.It Xo
|
|
.Ic .ifnmake
|
|
.Oo \&! Oc Ar target
|
|
.Op Ar operator target ...
|
|
.Xc
|
|
Test the target being built.
|
|
.It Ic .else
|
|
Reverse the sense of the last conditional.
|
|
.It Xo
|
|
.Ic .elif
|
|
.Oo \&! Oc Ar expression
|
|
.Op Ar operator expression ...
|
|
.Xc
|
|
A combination of
|
|
.Ql Ic .else
|
|
followed by
|
|
.Ql Ic .if .
|
|
.It Xo
|
|
.Ic .elifdef
|
|
.Oo \&! Oc Ns Ar variable
|
|
.Op Ar operator variable ...
|
|
.Xc
|
|
A combination of
|
|
.Ql Ic .else
|
|
followed by
|
|
.Ql Ic .ifdef .
|
|
.It Xo
|
|
.Ic .elifndef
|
|
.Oo \&! Oc Ns Ar variable
|
|
.Op Ar operator variable ...
|
|
.Xc
|
|
A combination of
|
|
.Ql Ic .else
|
|
followed by
|
|
.Ql Ic .ifndef .
|
|
.It Xo
|
|
.Ic .elifmake
|
|
.Oo \&! Oc Ns Ar target
|
|
.Op Ar operator target ...
|
|
.Xc
|
|
A combination of
|
|
.Ql Ic .else
|
|
followed by
|
|
.Ql Ic .ifmake .
|
|
.It Xo
|
|
.Ic .elifnmake
|
|
.Oo \&! Oc Ns Ar target
|
|
.Op Ar operator target ...
|
|
.Xc
|
|
A combination of
|
|
.Ql Ic .else
|
|
followed by
|
|
.Ql Ic .ifnmake .
|
|
.It Ic .endif
|
|
End the body of the conditional.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Ar operator
|
|
may be any one of the following:
|
|
.Bl -tag -width "Cm XX"
|
|
.It Cm \&|\&|
|
|
logical OR
|
|
.It Cm \&&&
|
|
Logical
|
|
.Tn AND ;
|
|
of higher precedence than
|
|
.Dq .
|
|
.El
|
|
.Pp
|
|
As in C,
|
|
.Nm make
|
|
will only evaluate a conditional as far as is necessary to determine
|
|
its value.
|
|
Parenthesis may be used to change the order of evaluation.
|
|
The boolean operator
|
|
.Ql Ic \&!
|
|
may be used to logically negate an entire
|
|
conditional.
|
|
It is of higher precedence than
|
|
.Ql Ic \&&& .
|
|
.Pp
|
|
The value of
|
|
.Ar expression
|
|
may be any of the following:
|
|
.Bl -tag -width Ic defined
|
|
.It Ic defined
|
|
Takes a variable name as an argument and evaluates to true if the variable
|
|
has been defined.
|
|
.It Ic make
|
|
Takes a target name as an argument and evaluates to true if the target
|
|
was specified as part of
|
|
.Nm make Ns 's
|
|
command line or was declared the default target (either implicitly or
|
|
explicitly, see
|
|
.Va .MAIN )
|
|
before the line containing the conditional.
|
|
.It Ic empty
|
|
Takes a variable, with possible modifiers, and evaluates to true if
|
|
the expansion of the variable would result in an empty string.
|
|
.It Ic exists
|
|
Takes a file name as an argument and evaluates to true if the file exists.
|
|
The file is searched for on the system search path (see
|
|
.Va .PATH ) .
|
|
.It Ic target
|
|
Takes a target name as an argument and evaluates to true if the target
|
|
has been defined.
|
|
.El
|
|
.Pp
|
|
.Ar Expression
|
|
may also be an arithmetic or string comparison. Variable expansion is
|
|
performed on both sides of the comparison, after which the integral
|
|
values are compared. A value is interpreted as hexadecimal if it is
|
|
preceded by 0x, otherwise it is decimal; octal numbers are not supported.
|
|
The standard C relational operators are all supported. If after
|
|
variable expansion, either the left or right hand side of a
|
|
.Ql Ic ==
|
|
or
|
|
.Ql Ic "!="
|
|
operator is not an integral value, then
|
|
string comparison is performed between the expanded
|
|
variables.
|
|
If no relational operator is given, it is assumed that the expanded
|
|
variable is being compared against 0.
|
|
.Pp
|
|
When
|
|
.Nm make
|
|
is evaluating one of these conditional expression, and it encounters
|
|
a word it doesn't recognize, either the ``make'' or ``defined''
|
|
expression is applied to it, depending on the form of the conditional.
|
|
If the form is
|
|
.Ql Ic .ifdef
|
|
or
|
|
.Ql Ic .ifndef ,
|
|
the ``defined'' expression
|
|
is applied.
|
|
Similarly, if the form is
|
|
.Ql Ic .ifmake
|
|
or
|
|
.Ql Ic .ifnmake , the ``make''
|
|
expression is applied.
|
|
.Pp
|
|
If the conditional evaluates to true the parsing of the makefile continues
|
|
as before.
|
|
If it evaluates to false, the following lines are skipped.
|
|
In both cases this continues until a
|
|
.Ql Ic .else
|
|
or
|
|
.Ql Ic .endif
|
|
is found.
|
|
.Pp
|
|
For loops are typically used to apply a set of rules to a list of files.
|
|
The syntax of a for loop is:
|
|
.Bl -tag -width Ds
|
|
.It Xo
|
|
.Ic \&.for
|
|
.Ar variable
|
|
.Ic in
|
|
.Ar expression
|
|
.Xc
|
|
.It Xo
|
|
<make-rules>
|
|
.Xc
|
|
.It Xo
|
|
.Ic \&.endfor
|
|
.Xc
|
|
.El
|
|
After the for
|
|
.Ic expression
|
|
is evaluated, it is split into words. The
|
|
iteration
|
|
.Ic variable
|
|
is successively set to each word, and substituted in the
|
|
.Ic make-rules
|
|
inside the body of the for loop.
|
|
.Sh COMMENTS
|
|
Comments begin with a hash
|
|
.Pq Ql \&#
|
|
character, anywhere but in a shell
|
|
command line, and continue to the end of the line.
|
|
.Sh SPECIAL SOURCES
|
|
.Bl -tag -width Ic .IGNORE
|
|
.It Ic .IGNORE
|
|
Ignore any errors from the commands associated with this target, exactly
|
|
as if they all were preceded by a dash
|
|
.Pq Ql \- .
|
|
.It Ic .MAKE
|
|
Execute the commands associated with this target even if the
|
|
.Fl n
|
|
or
|
|
.Fl t
|
|
options were specified.
|
|
Normally used to mark recursive
|
|
.Nm make Ns 's .
|
|
.It Ic .NOTMAIN
|
|
Normally
|
|
.Nm make
|
|
selects the first target it encounters as the default target to be built
|
|
if no target was specified.
|
|
This source prevents this target from being selected.
|
|
.It Ic .OPTIONAL
|
|
If a target is marked with this attribute and
|
|
.Nm make
|
|
can't figure out how to create it, it will ignore this fact and assume
|
|
the file isn't needed or already exists.
|
|
.It Ic .PRECIOUS
|
|
When
|
|
.Nm make
|
|
is interrupted, it removes any partially made targets.
|
|
This source prevents the target from being removed.
|
|
.It Ic .SILENT
|
|
Do not echo any of the commands associated with this target, exactly
|
|
as if they all were preceded by an at sign
|
|
.Pq Ql @ .
|
|
.It Ic .USE
|
|
Turn the target into
|
|
.Nm make Ns 's .
|
|
version of a macro.
|
|
When the target is used as a source for another target, the other target
|
|
acquires the commands, sources, and attributes (except for
|
|
.Ic .USE )
|
|
of the
|
|
source.
|
|
If the target already has commands, the
|
|
.Ic .USE
|
|
target's commands are appended
|
|
to them.
|
|
.El
|
|
.Sh "SPECIAL TARGETS"
|
|
Special targets may not be included with other targets, i.e. they must be
|
|
the only target specified.
|
|
.Bl -tag -width Ic .BEGIN
|
|
.It Ic .BEGIN
|
|
Any command lines attached to this target are executed before anything
|
|
else is done.
|
|
.It Ic .DEFAULT
|
|
This is sort of a
|
|
.Ic .USE
|
|
rule for any target (that was used only as a
|
|
source) that
|
|
.Nm make
|
|
can't figure out any other way to create.
|
|
Only the shell script is used.
|
|
The
|
|
.Ic .IMPSRC
|
|
variable of a target that inherits
|
|
.Ic .DEFAULT Ns 's
|
|
commands is set
|
|
to the target's own name.
|
|
.It Ic .END
|
|
Any command lines attached to this target are executed after everything
|
|
else is done.
|
|
.It Ic .IGNORE
|
|
Mark each of the sources with the
|
|
.Ic .IGNORE
|
|
attribute.
|
|
If no sources are specified, this is the equivalent of specifying the
|
|
.Fl i
|
|
option.
|
|
.It Ic .INTERRUPT
|
|
If
|
|
.Nm make
|
|
is interrupted, the commands for this target will be executed.
|
|
.It Ic .MAIN
|
|
If no target is specified when
|
|
.Nm make
|
|
is invoked, this target will be built.
|
|
.It Ic .MAKEFLAGS
|
|
This target provides a way to specify flags for
|
|
.Nm make
|
|
when the makefile is used.
|
|
The flags are as if typed to the shell, though the
|
|
.Fl f
|
|
option will have
|
|
no effect.
|
|
.It Ic .PATH
|
|
The sources are directories which are to be searched for files not
|
|
found in the current directory.
|
|
If no sources are specified, any previously specified directories are
|
|
deleted.
|
|
.It Ic .PRECIOUS
|
|
Apply the
|
|
.Ic .PRECIOUS
|
|
attribute to any specified sources.
|
|
If no sources are specified, the
|
|
.Ic .PRECIOUS
|
|
attribute is applied to every
|
|
target in the file.
|
|
.It Ic .SILENT
|
|
Apply the
|
|
.Ic .SILENT
|
|
attribute to any specified sources.
|
|
If no sources are specified, the
|
|
.Ic .SILENT
|
|
attribute is applied to every
|
|
command in the file.
|
|
.It Ic .SUFFIXES
|
|
Each source specifies a suffix to
|
|
.Nm make .
|
|
If no sources are specified, any previous specified suffices are deleted.
|
|
.Sh ENVIRONMENT
|
|
.Nm Make
|
|
utilizes the following environment variables, if they exist:
|
|
.Ev MAKE ,
|
|
.Ev MAKEFLAGS
|
|
and
|
|
.Ev MAKEOBJDIR .
|
|
.Sh FILES
|
|
.Bl -tag -width /usr/share/mk -compact
|
|
.It .depend
|
|
list of dependencies
|
|
.It Makefile
|
|
list of dependencies
|
|
.It makefile
|
|
list of dependencies
|
|
.It sys.mk
|
|
system makefile
|
|
.It /usr/share/mk
|
|
system makefile directory
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr mkdep 1
|
|
.Sh HISTORY
|
|
A
|
|
.Nm Make
|
|
command appeared in
|
|
.At v7 .
|