From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/gnu_make/pattern-rules.html | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 devdocs/gnu_make/pattern-rules.html (limited to 'devdocs/gnu_make/pattern-rules.html') diff --git a/devdocs/gnu_make/pattern-rules.html b/devdocs/gnu_make/pattern-rules.html new file mode 100644 index 00000000..1a7c1f4d --- /dev/null +++ b/devdocs/gnu_make/pattern-rules.html @@ -0,0 +1,36 @@ +

Defining and Redefining Pattern Rules

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. See How to Use Variables, and Functions for Transforming Text.

+ + + + + + + + + + + + + + + + + + + + + + + +
• Pattern Intro + An introduction to pattern rules.
• Pattern Examples + Examples of pattern rules.
• Automatic Variables + How to use automatic variables in the recipe 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.
+

+ Copyright © 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 Free Software Foundation, Inc.
Licensed under the GNU Free Documentation License.
+ https://www.gnu.org/software/make/manual/html_node/Pattern-Rules.html +

+
-- cgit v1.2.3