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Update CHEATSHEET.md

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Mike Gran 2021-02-10 10:03:29 -08:00 committed by GitHub
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CHEATSHEET.md
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@ -36,9 +36,9 @@ are syntax that add quotation marks around `key`, so you call them without the q
Assign `val` to `key` in the `%makevars` hash table. If `val` is a procedure, Assign `val` to `key` in the `%makevars` hash table. If `val` is a procedure,
evaluate it and assign its output to `key` immediately. evaluate it and assign its output to `key` immediately.
## RULES ## Rules
The target rule is for when the target, and the prerequisites, if any, The *target rule* is for when the target, and the prerequisites, if any,
have filenames or phony names. have filenames or phony names.
(: target-name '(prereq-name-1 prereq-name-2 ...) (: target-name '(prereq-name-1 prereq-name-2 ...)
@ -80,13 +80,13 @@ have filenames or phony names.
(: "foo.c" '("foo.c") (: "foo.c" '("foo.c")
(~ ($ CC) ($ CFLAGS) "-c" $<)) (~ ($ CC) ($ CFLAGS) "-c" $<))
The suffix rule is a generic rule to convert one file type to another. The *suffix rule* is a generic rule to convert one source file to
Note that the prerequisites is *not* a list. a target file, based on the filename extensions.
(-> ".c" ".o" (-> ".c" ".o"
(~ ($ CC) ($ CFLAGS) ".c" $<)) (~ ($ CC) ($ CFLAGS) "-c" $< "-o" $@))
# RECIPE HELPERS ## Recipe Helpers
Concatenate elements with `~`. `~` inserts spaces between the elements. Concatenate elements with `~`. `~` inserts spaces between the elements.
Elements can be Elements can be
@ -104,6 +104,8 @@ Note that the prerequisites is *not* a list.
(~@ ...) doesn't print recipe to console (~@ ...) doesn't print recipe to console
(~+ ...) runs even when `--no-execute` was chosen (~+ ...) runs even when `--no-execute` was chosen
## Special Variables
Recipes can contain the following special variables Recipes can contain the following special variables
$@ the target $@ the target