NetCube-Systems-Austria/kumquat-buildroot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

packages: add infrastructure for virtual packages

Browse Source 
The virtual-package infrastructure allows to easily define a
virtual package in a single line:

    $ cat package/some-virtual-package/some-virtual-package.mk
    $(eval $(virtual-package))

And that's all. :-)

Thanks to Éric for his work on the manual, that prompted the
idea for this virtual-package infrastructure! ;-)

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Mike Zick <minimod@morethan.org>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2014-04-05 17:21:45 +02:00 committed by Thomas Petazzoni
parent 7862abad78
commit 7439824412
2 changed files with 67 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
package/Makefile.in
View File

@ -371,4 +371,5 @@ include package/pkg-cmake.mk
include package/pkg-luarocks.mk
include package/pkg-perl.mk
include package/pkg-python.mk
include package/pkg-virtual.mk
include package/pkg-generic.mk

66
package/pkg-virtual.mk Normal file
View File

@ -0,0 +1,66 @@
################################################################################
# Virtual package infrastructure
#
# This file implements an infrastructure that eases development of
# package .mk files for virtual packages. It should be used for all
# virtual packages.
#
# See the Buildroot documentation for details on the usage of this
# infrastructure
#
# In terms of implementation, this virtual infrastructure requires
# the .mk file to only call the 'virtual-package' macro.
#
################################################################################
################################################################################
# inner-virtual-package -- defines the dependency rules of the virtual
# package against its provider.
#
# argument 1 is the lowercase package name
# argument 2 is the uppercase package name, including an HOST_ prefix
# for host packages
# argument 3 is the uppercase package name, without the HOST_ prefix
# for host packages
# argument 4 is the type (target or host)
################################################################################
# Note: putting this comment here rather than in the define block, otherwise
# make would try to expand the $(error ...) in the comment, which is not
# really what we want.
# We need to use second-expansion for the $(error ...) call, below,
# so it is not evaluated now, but as part of the generated make code.
define inner-virtual-package
# Ensure the virtual package has an implementation defined.
ifeq ($(BR2_PACKAGE_HAS_$(2)),y)
ifeq ($(call qstrip,$(BR2_PACKAGE_PROVIDES_$(2))),)
$$(error No implementation selected for virtual package $(1). Configuration error)
endif
endif
# A virtual package does not have any source associated
$(2)_SOURCE =
# This must be repeated from inner-generic-package, otherwise we get an empty
# _DEPENDENCIES
$(2)_DEPENDENCIES ?= $(filter-out host-toolchain $(1),\
$(patsubst host-host-%,host-%,$(addprefix host-,$($(3)_DEPENDENCIES))))
# Add dependency against the provider
$(2)_DEPENDENCIES += $(call qstrip,$(BR2_PACKAGE_PROVIDES_$(2)))
# Call the generic package infrastructure to generate the necessary
# make targets
$(call inner-generic-package,$(1),$(2),$(3),$(4))
endef
################################################################################
# virtual-package -- the target generator macro for virtual packages
################################################################################
virtual-package = $(call inner-virtual-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)
host-virtual-package = $(call inner-virtual-package,host-$(pkgname),$(call UPPERCASE,host-$(pkgname)),$(call UPPERCASE,$(pkgname)),host)