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Note that in both :U and :D newval may be empty

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sjg 2024-01-25 21:00:59 +00:00
parent 8df5b02599
commit 384f068bd8
1 changed files with 4 additions and 4 deletions
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8
usr.bin/make/make.1
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@ -1,4 +1,4 @@
.\" $NetBSD: make.1,v 1.373 2024/01/25 07:35:46 sjg Exp $
.\" $NetBSD: make.1,v 1.374 2024/01/25 21:00:59 sjg Exp $
.\"
.\" Copyright (c) 1990, 1993
.\" The Regents of the University of California. All rights reserved.
@ -1772,11 +1772,11 @@ is used to save the result of the
.Ql :S
modifier which is later referenced using the index values from
.Ql :range .
.It Cm \&:U\| Ns Oo Ar newval Oc
.It Cm \&:U\| Ns Ar newval
If the variable is undefined,
the optional
.Ar newval
is the value.
(which may be empty) is the value.
If the variable is defined, the existing value is returned.
This is another ODE make feature.
It is handy for setting per-target CFLAGS for instance:
@ -1786,7 +1786,7 @@ If a value is only required if the variable is undefined, use:
.It Cm \&:D\| Ns Ar newval
If the variable is defined,
.Ar newval
is the value.
(which may be empty) is the value.
.It Cm \&:L
The name of the variable is the value.
.It Cm \&:P