From 158da0c5e9caa5e12090880c34e1ff4bd3ee476f Mon Sep 17 00:00:00 2001 From: Mike Gran Date: Wed, 10 Feb 2021 10:03:29 -0800 Subject: [PATCH] Update CHEATSHEET.md --- CHEATSHEET.md | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/CHEATSHEET.md b/CHEATSHEET.md index 76494c2..b5d3a65 100644 --- a/CHEATSHEET.md +++ b/CHEATSHEET.md @@ -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, 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. (: target-name '(prereq-name-1 prereq-name-2 ...) @@ -80,13 +80,13 @@ have filenames or phony names. (: "foo.c" '("foo.c") (~ ($ CC) ($ CFLAGS) "-c" $<)) -The suffix rule is a generic rule to convert one file type to another. -Note that the prerequisites is *not* a list. +The *suffix rule* is a generic rule to convert one source file to +a target file, based on the filename extensions. (-> ".c" ".o" - (~ ($ CC) ($ CFLAGS) ".c" $<)) + (~ ($ CC) ($ CFLAGS) "-c" $< "-o" $@)) -# RECIPE HELPERS +## Recipe Helpers Concatenate elements with `~`. `~` inserts spaces between the elements. Elements can be @@ -103,7 +103,9 @@ Note that the prerequisites is *not* a list. (~- ...) ignores any errors (~@ ...) doesn't print recipe to console (~+ ...) runs even when `--no-execute` was chosen - + +## Special Variables + Recipes can contain the following special variables $@ the target