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Improve description of -V. Can probably be improved further.

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dholland 2017-06-22 13:42:09 +00:00
parent ffa8eeb219
commit 8d1c7950e6
1 changed files with 23 additions and 8 deletions
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31
usr.bin/make/make.1
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@ -1,4 +1,4 @@
.\" $NetBSD: make.1,v 1.269 2017/06/22 13:34:13 wiz Exp $ .\" $NetBSD: make.1,v 1.270 2017/06/22 13:42:09 dholland Exp $
.\" .\"
.\" Copyright (c) 1990, 1993 .\" Copyright (c) 1990, 1993
.\" The Regents of the University of California. All rights reserved. .\" The Regents of the University of California. All rights reserved.
@ -337,24 +337,39 @@ for each job started and completed.
Rather than re-building a target as specified in the makefile, create it Rather than re-building a target as specified in the makefile, create it
or update its modification time to make it appear up-to-date. or update its modification time to make it appear up-to-date.
.It Fl V Ar variable .It Fl V Ar variable
Print Print the value of
.Nm Ns 's .Ar variable .
idea of the value of
.Ar variable ,
in the global context.
Do not build any targets. Do not build any targets.
Multiple instances of this option may be specified; Multiple instances of this option may be specified;
the variables will be printed one per line, the variables will be printed one per line,
with a blank line for each null or undefined variable. with a blank line for each null or undefined variable.
The value printed is extracted from the global context after all
makefiles have been read.
By default, the raw variable contents (which may
include additional unexpanded variable references) are shown.
If If
.Ar variable .Ar variable
contains a contains a
.Ql \&$ .Ql \&$
then the value will be expanded before printing. then the value will be recursively expanded to its complete resultant
text before printing.
The expanded value will also be printed if
.Va .MAKE.EXPAND_VARIABLES
is set to true and
the
.Fl dV
option has not been used to override it.
Note that loop-local and target-local variables, as well as values
taken temporarily by global variables during makefile processing, are
not accessible via this option.
The
.Fl dv
debug mode can be used to see these at the cost of generating
substantial extraneous output.
.It Fl v Ar variable .It Fl v Ar variable
Like Like
.Fl V .Fl V
but the variable is always expanded to its final value. but the variable is always expanded to its complete value.
.It Fl W .It Fl W
Treat any warnings during makefile parsing as errors. Treat any warnings during makefile parsing as errors.
.It Fl w .It Fl w