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(make.info)Pattern Rules

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Defining and Redefining Pattern Rules
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   You define an implicit rule by writing a "pattern rule".  A pattern
rule looks like an ordinary rule, except that its target contains the
character `%' (exactly one of them).  The target is considered a
pattern for matching file names; the `%' can match any nonempty
substring, while other characters match only themselves.  The
prerequisites likewise use `%' to show how their names relate to the
target name.

   Thus, a pattern rule `%.o : %.c' says how to make any file `STEM.o'
from another file `STEM.c'.

   Note that expansion using `%' in pattern rules occurs *after* any
variable or function expansions, which take place when the makefile is
read.  Note: How to Use Variables, and Note: Functions
for Transforming Text.

Pattern Intro

An introduction to pattern rules.

Pattern Examples

Examples of pattern rules.

Automatic

How to use automatic variables in the

commands of implicit rules.

Pattern Match

How patterns match.

Match-Anything Rules

Precautions you should take prior to

defining rules that can match any target file whatever.

Canceling Rules

How to override or cancel built-in rules.