5d37a0c54d
Applying set() and only set() to a GLOBAL_* is safe but still a potentially confusing example; so let's just do it right (and warn unsuspecting folks too).
46 lines
1.4 KiB
Makefile
46 lines
1.4 KiB
Makefile
# NB: don"t use ANY quotes ('/") for put()/add()/set() arguments!
|
|
# shell will get confused by ' or args get spammed with "
|
|
|
|
# pay attention to the context functions get called in:
|
|
# e.g. features.in/syslinux/config.mk introduces conditionals
|
|
|
|
# this one adds whatever is given as an argument
|
|
put = $(and $(1),$(put_body))
|
|
define put_body
|
|
{ $(log_body); \
|
|
printf '%s\n' '$(1)' >> "$(CONFIG)"; }
|
|
endef
|
|
|
|
# these three take two args
|
|
# add() just appends an additive rule...
|
|
add = $(and $(1),$(2),$(add_body))
|
|
define add_body
|
|
$(if $(filter GLOBAL_% INFO_%,$(1)),$(warning add,$(1) might be a problem)) \
|
|
{ $(log_body); \
|
|
printf '%s += %s\n' '$(1)' '$(2)' >> "$(CONFIG)"; }
|
|
endef
|
|
|
|
# ...set() comments out any previous definition
|
|
# and then appends an assigning rule...
|
|
set = $(and $(1),$(2),$(set_body))
|
|
define set_body
|
|
{ $(log_body); \
|
|
subst 's|^$(1)[ ]*[+?]*=.*$$|#& # overridden by $@|' "$(CONFIG)"; \
|
|
printf '%s = %s\n' '$(1)' '$(2)' >> "$(CONFIG)"; }
|
|
endef
|
|
|
|
# try() appends a conditionally-assigning rule
|
|
try = $(and $(1),$(2),$(try_body))
|
|
define try_body
|
|
{ $(log_body); \
|
|
printf '%s ?= %s\n' '$(1)' '$(2)' >> "$(CONFIG)"; }
|
|
endef
|
|
|
|
# if the rule being executed isn't logged yet, log it
|
|
define log_body
|
|
{ grep -q '^# $@$$' "$(CONFIG)" || printf '# %s\n' '$@' >> "$(CONFIG)"; }
|
|
endef
|
|
|
|
# convert tag list into a list of relative package list paths
|
|
tags = $(and $(strip $(1)),$(addprefix tagged/,$(shell echo "$(1)" | bin/tags2lists pkg.in/lists/tagged)))
|