d77e1d8dc8
A major change in approach largely thanks to discussions with Alexey Cheusov but also well aligned with my own findings: autoconf doesn't let the variables to form an inheritance. And data flow described at http://www.altlinux.org/WhiteLabel (which in its turn was born thanks to Gavin Henrick of Diva Telecom and to Alexander Bokovoy of SaM-Solutions) is really dependent on the existence of such an inheritance. Also: - distro.mk += try() - "hide" special targets - fixed wrt distro/.{base,init,metaconf}, thx gns@ - README updates + added metaconf.mk + clarifications - updated pci.ids location for hdt
44 lines
1.2 KiB
Makefile
44 lines
1.2 KiB
Makefile
# NB: don"t use ANY quotes ('/") for put()/add()/set() arguments!
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# shell will get confused by ' or args get spammed with "
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# pay attention to the context in which functions get called:
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# e.g. features.in/syslinux/config.mk introduces conditionals
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# this one adds whatever is given as an argument
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put = $(and $(1),$(put_body))
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define put_body
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{ $(log_body); \
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printf '%s\n' '$(1)' >> "$(CONFIG)"; }
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endef
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# these three take two args
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# add() just appends an additive rule...
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add = $(and $(1),$(2),$(add_body))
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define add_body
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{ $(log_body); \
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printf '%s += %s\n' '$(1)' '$(2)' >> "$(CONFIG)"; }
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endef
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# ...set() comments out any previous definition
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# and then appends an assigning rule...
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set = $(and $(1),$(2),$(set_body))
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define set_body
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{ $(log_body); \
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subst 's|^$(1)[ ]*[+?]*=.*$$|#& # overridden by $@|' "$(CONFIG)"; \
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printf '%s = %s\n' '$(1)' '$(2)' >> "$(CONFIG)"; }
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endef
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# try() appends a conditionally-assigning rule
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try = $(and $(1),$(2),$(try_body))
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define try_body
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{ $(log_body); \
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printf '%s ?= %s\n' '$(1)' '$(2)' >> "$(CONFIG)"; }
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endef
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# if the rule being executed isn't logged yet, log it
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define log_body
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{ grep -q '^# $@$$' "$(CONFIG)" || printf '# %s\n' '$@' >> "$(CONFIG)"; }
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endef
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tags = $(shell echo "$(1)" | bin/tags2lists)
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