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

make
Special Target Directives
Special target directives are called targets because they appear in the target
position of rules; however, they are really keywords, not targets. The rules they
appear in are really directives that control the behavior of make.
The special target must be the only target in a special rule; you cannot list other
normal or special targets.
Some special targets are affected by some attributes. Any special target can be
given any attribute, but often the combination is meaningless and the attribute has
no effect.
.BRACEEXPAND
This target may have no prerequisites and no recipes associated with it. If
set, the target enables the outdated brace expansion feature used in older
versions of make. Older makes would expand a construct of the following
form, beginning with each token in the token list:
string1{token_list}string2
Older makes would append string1 to the front of each token in the list, and
string2 to the end of each token in the list. A more productive means for
achieving the same result with modern versions of make relies on macro
expansion with prefix and suffix modifiers:
$ (TOKEN_BASE:^"prefix:+"suffix")
The double quotes are required. Brace expansion is an outdated feature
available in past versions of make.
.CYCLECHECK
This special target cannot have any prerequisites or recipes associated with
it. If set, it determines how make treaters circular dependencies (see
“Circular Dependencies” on page 398).
404 z/OS V1R9.0 UNIX System Services Command Reference
You can specify one of five attributes with this target. If you specify more
than one attribute, an error message results. The five attributes are:
.SILENT
make remains silent about any within-rule and between-rule circular
dependencies, removes the offending dependency from the list of
prerequisites, and continues.
.WARNTARG
make issues warnings for named targets with circular
dependencies. If the name of the dependency is the same as the
named target, it is removed from the list of prerequisites and make
continues. This is the default behavior if .CYCLECHECK is not
specified or is specified with no attributes.
.WARNALL
make issues warnings for all within-rule circular dependencies
regardless of whether the target is being built or not and for all
between-rule circular dependencies for the named targets. The
offending dependency is removed from the list of prerequisites and
make continues.
.FATALTARG
make treats all circular dependencies for named targets as fatal
errors. It issues an error message and exits.