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@@ write "t: p" instead of "t : p" or "t :p"
@@ write $(call f,a) instead of $(call f, a) or $(call f , a)
@@ Use '-' to separate words in function names (e.g. foo-bar);
use 'define' to define functions.
@@ Use '_' to separate words in variable names (e.g. foo_bar);
use := to assign value to a variable. Use '=' if you know
what you are doing.
@@ Be careful with += in target-specific variables.
@@ Action explicitly requested by the user (which should correspond
to verbs, e.g. install, clean, configure) should perform without
regards to up-to-dateness.
@@ Use verbs for .PHONY targets. There is one notable exception:...
@! maybe declare `__' variable prefix reserved?
@@ Use directory name as a default phony target in directory makefiles.
(explain why).
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