z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

Makefile Contents
Inside makefiles, you can split long lines over several lines of text. To do this, put a
backslash (\) at the very end of the line. You can use this technique to extend
comments as well as recipe lines and macro definitions, for example.
Rules
If a rule or macro definition must contain a # character, use \#; otherwise, make
mistakes the # for the beginning of a comment. Also, if a macro definition must
contain a single $ character, use $$.
Filenames that contain a colon must always be enclosed in quotes, as in:
"a:target" : "a:prereq"
The general format of a rule is:
targets [attributes] ruleop [prerequisites]
[;recipe]
{ recipe}
where the items enclosed in square brackets are optional. (This is just a
documentation convention; you do not actually enter the square brackets.) The
parts of the rule are described as follows:
targets
One or more target names.
attributes
A list, possibly empty, of attributes to apply to the list of targets.
ruleop An operator token, usually a colon (:), that separates the target names from
the prerequisite names and may also affect the processing of the specified
targets.
prerequisites
A list of zero or more names on which the specified targets depend.
make
recipe A command to execute to update targets. May follow on the same line as
the prerequisites, separated from them by a semicolon. If such a recipe is
present, make takes it as the first in the list of recipe lines defining how to
make the named targets. Additional recipe lines may follow the first line of
the rule. Each subsequent recipe line must begin with a tab character.
The possible rule operators are listed as follows:
targets : prereqs
Is a simple rule definition. For explicit targets, at most one simple rule may
have a recipe, in contrast with the :: rule operator, whose description
follows.
targets :! prereqs
Executes the recipe for the associated targets once for each recently
changed prerequisite. In simple rules, the recipe is executed only once, for
all recently changed prerequisites at the same time. The $< macro expands
to the current recently changed prerequisites if it appears in rules with this
rule operator.
targets :^ prereqs
Inserts the specified prerequisites before any other prerequisites already
associated with the specified targets.
Chapter 2. Shell command descriptions 397