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diff --git a/makefile.md b/makefile.md new file mode 100644 index 0000000..a7a3ab8 --- /dev/null +++ b/makefile.md @@ -0,0 +1,30 @@ +# Writing Makefiles + +## Pattern rules + +In prerequesite, use exactly one `%`. Can then be used in requirements. E.g. + + %.o: %.c + # compile .c file to .o + +Details: <https://www.gnu.org/software/make/manual/html_node/Pattern-Rules.html> + +## Automatic variables + +* `$@`: current target +* `$<`: first prerequisite +* `$^`: all prerequisites, separated by spaces +* `$(@F)`: file-within-directory part of target path + +More: <https://www.gnu.org/software/make/manual/html_node/Automatic-Variables.html> + +## Text functions + +* `$(var:suffix=replacement)`, syntax sugar for + `$(patsubst %suffix, $replacement, $(var))` + +More: <https://www.gnu.org/software/make/manual/html_node/Text-Functions.html> + +## Quiet commands + +By default, `make` prints the command being run. Prepend `@` to silence this. |