mkimage-profiles/functions.mk
Michael Shigorin 16e763e9ea kernel day
- drop hardwired kernel flavour from pkglists
- today's std-ng lacks aufs, let's switch to un-def
- second assault at KERNEL_PACKAGES_REGEXP
- re-introduced kpackages (builds ok)

PS: base lists: switch to grub, add udev, cleanup
2011-11-04 16:15:29 +02:00

45 lines
1.3 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 in which functions get called:
# 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
{ $(log_body); \
printf '%s += %s\n' '$(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 = $(addprefix tagged/,$(shell echo "$(1)" | bin/tags2lists))