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* doc/make.texi: Update out of date behavior for grouped targets.

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Paul Smith 2022-09-25 16:58:36 -04:00
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1 changed files with 14 additions and 14 deletions
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doc/make.texi
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@ -3307,17 +3307,17 @@ can do it with a @dfn{static pattern rule}. @xref{Static Pattern,
@cindex grouped targets
@cindex targets, grouped
If instead of independent targets you have a recipe that generates
multiple files from a single invocation, you can express that
relationship by declaring your rule to use @emph{grouped targets}. A
grouped target rule uses the separator @code{&:} (the @samp{&} here is
used to imply ``all'').
If instead of independent targets you have a recipe that generates multiple
files from a single invocation, you can express that relationship by declaring
your rule to use @emph{grouped targets}. A grouped target rule uses the
separator @code{&:} (the @samp{&} here is used to imply ``all'').
When @code{make} builds any one of the grouped targets, it understands
that all the other targets in the group are also created as a result
of the invocation of the recipe. Furthermore, if only some of the
grouped targets are out of date or missing @code{make} will realize
that running the recipe will update all of the targets.
When @code{make} builds any one of the grouped targets, it understands that
all the other targets in the group are also updated as a result of the
invocation of the recipe. Furthermore, if only some of the grouped targets
are out of date or missing @code{make} will realize that running the recipe
will update all of the targets. Finally, if any of the grouped targets are
out of date, all the grouped targets are considered out of date.
As an example, this rule defines a grouped target:
@ -10618,10 +10618,10 @@ More than one pattern rule may match a target. In this case
@cindex multiple targets, in pattern rule
@cindex target, multiple in pattern rule
Pattern rules may have more than one target; however, every target
must contain a @code{%} character. Pattern rules are always treated
as grouped targets (@pxref{Multiple Targets, , Multiple Targets in a
Rule}) regardless of whether they use the @code{:} or @code{&:}
Pattern rules may have more than one target; however, every target must
contain a @code{%} character. Multiple target patterns in pattern rules are
always treated as grouped targets (@pxref{Multiple Targets, , Multiple Targets
in a Rule}) regardless of whether they use the @code{:} or @code{&:}
separator.
@node Pattern Examples, Automatic Variables, Pattern Intro, Pattern Rules