[Buildroot] [PATCH 12/23] arch/xtensa: add macros to generate hooks

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Tue, 14 Mar 2017 11:30:41 -0700, Max Filippov wrote:

> +################################################################################
> +# arch-xtensa-overlay-inner -- generates the make targets needed to extract
> +# the xtensa overlay
> +#
> +# argument 1 is the uppercase package name, including a HOST_ prefix
> +#            for host packages
> +#
> +# Packages that call that macro shall define FOO_ARCH_XTENSA_OVERLAY_COMPONENT
> +# and set it to one of the component to extract, one of: binutils, gcc, gdb.
> +#
> +################################################################################
> +define arch-xtensa-overlay-inner
> +
> +ifneq ($$(ARCH_XTENSA_CORE_NAME),)
> +
> +define $(1)_XTENSA_OVERLAY_EXTRACT
> +	$$(call arch-xtensa-overlay-extract,$$(@D),$$($(1)_ARCH_XTENSA_OVERLAY_COMPONENT))
> +endef
> +$(1)_POST_EXTRACT_HOOKS += $(1)_XTENSA_OVERLAY_EXTRACT
> +
> +endif # ARCH_XTENSA_CORE_NAME != ""
> +
> +endef # arch-xtensa-overlay-inner
> +
> +################################################################################
> +# arch-xtensa-overlay -- the target generator macro for the Xtensa overlay
> +################################################################################
> +arch-xtensa-overlay = $(call arch-xtensa-overlay-inner,$(call UPPERCASE,$(pkgname)))
> +host-arch-xtensa-overlay = $(call arch-xtensa-overlay-inner,HOST_$(call UPPERCASE,$(pkgname)))

I must say I am not entirely convinced by this macro. It really makes
thing less obvious to read, and doesn't really remove a lot of code
duplication.

So I'm still hesitating on this one. It's not a big no, but an
hesitation. However, I'm clearly interested by the following stuff that
allows to download the overlay tarball instead of having it in
Buildroot itself.

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com