The type for variables.
The type for makefile rules.
create ext targets prereqs order_only_prereqs is a makfile
rule defined as follows:
targets : prereqs | order-only-prerequs recipe ...
true, the rule is extensible, that is uses
:: instead of
These variables can be used in recipes to refer to certain definitions of the rule being defined.
The file name of the target of the rule. If the target is an
archive member, then
$@is the name of the archive file. In a
pattern rule that has multiple targets (see Introduction to Pattern
$@ is the name of whichever target caused the rule's
recipe to be run.
The target member name, when the target is an archive
member. See Archives. For example, if the target is foo.a(bar.o)
$% is bar.o and
$@ is foo.a.
$% is empty when the
target is not an archive member.
The name of the first prerequisite. If the target got its recipe from an implicit rule, this will be the first prerequisite added by the implicit rule (see Implicit Rules).
The names of all the prerequisites that are newer than the target, with spaces between them. For prerequisites which are archive members, only the named member is used (see Archives).
The names of all the prerequisites, with spaces between
them. For prerequisites which are archive members, only the
named member is used (see Archives). A target has only one
prerequisite on each other file it depends on, no matter how
many times each file is listed as a prerequisite. So if you list
a prerequisite more than once for a target, the value of
contains just one copy of the name. This list does not contain
any of the order-only prerequisites; for those see the
This is like
$^, but prerequisites listed more than once are
duplicated in the order they were listed in the makefile. This
is primarily useful for use in linking commands where it is
meaningful to repeat library file names in a particular
The stem with which an implicit rule matches (see How Patterns
Match). If the target is
dir/a.foo.b and the target pattern is
a.%.b then the stem is
dir/foo. The stem is useful for
constructing names of related files. In a static pattern rule,
the stem is part of the file name that matched the
% in the
In an explicit rule, there is no stem; so
$* cannot be
determined in that way. Instead, if the target name ends with a
recognized suffix (see Old-Fashioned Suffix Rules),
$* is set
to the target name minus the suffix. For example, if the target
$* is set to
.c is a
suffix. GNU make does this bizarre thing only for compatibility
with other implementations of make. You should generally avoid
$* except in implicit rules or static pattern rules.
If the target name in an explicit rule does not end with a
$* is set to the empty string for that
The type for makefiles.