|GNU Make Manual||www.imodulo.com · 2003-04-05|
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In addition to target-specific variable values (Target-specific Variable Values), GNU
make supports pattern-specific variable values. In this form, a variable is defined for any target that matches the pattern specified. Variables defined in this way are searched after any target-specific variables defined explicitly for that target, and before target-specific variables defined for the parent target.
Set a pattern-specific variable value like this:
pattern ... : variable-assignment
or like this:
pattern ... : override variable-assignment
where pattern is a %-pattern. As with target-specific variable values, multiple pattern values create a pattern-specific variable value for each pattern individually. The variable-assignment can be any valid form of assignment. Any command-line variable setting will take precedence, unless
override is specified.
%.o : CFLAGS = -O
CFLAGS the value of
-O for all targets matching the pattern
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