mirror of
https://git.busybox.net/buildroot.git
synced 2024-11-23 05:23:39 +08:00
32d2de2a6f
Recently a build failure was reported which was traced back to to the fact that the user had a TOOLCHAIN_VERSION environment variable set which leads to a strange looking error message: toolchain/toolchain/toolchain.mk:40: *** TOOLCHAIN_SITE cannot be empty when TOOLCHAIN_SOURCE is not. Stop. Environment variables automatically gets converted to make variables by GNU make - E.G. from the manual (https://www.gnu.org/software/make/manual/html_node/Environment.html): Variables in make can come from the environment in which make is run. Every environment variable that make sees when it starts up is transformed into a make variable with the same name and value So we end up in make with TOOLCHAIN_VERSION set to the value of the environment variable. As virtual packages do not have a version, there is no explicit TOOLCHAIN_VERSION = .. line in toolchain.mk overriding this value, and the logic in package/pkg-generic.mk sets a default value for TOOLCHAIN_SOURCE when TOOLCHAIN_VERSION is set, and finally errors out as TOOLCHAIN_SITE isn't set. As a workaround, explicitly set <pkg>_VERSION and <pkg>_SOURCE to the empty string in the virtual package infrastructure. Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
78 lines
3.0 KiB
Makefile
78 lines
3.0 KiB
Makefile
################################################################################
|
|
# 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 a 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
|
|
|
|
# explicitly set these so we do not get confused by environment
|
|
# variables with the same names.
|
|
$(2)_VERSION =
|
|
$(2)_SOURCE =
|
|
|
|
$(2)_IS_VIRTUAL = YES
|
|
|
|
# Add dependency against the provider
|
|
# For a host package, there is no corresponding BR2_PACKAGE_PROVIDES_HOST_FOO,
|
|
# so we need to compute it from the target variant.
|
|
ifeq ($(4),target)
|
|
$(2)_DEPENDENCIES += $$(call qstrip,$$(BR2_PACKAGE_PROVIDES_$(2)))
|
|
else
|
|
ifeq ($$(call qstrip,$$(BR2_PACKAGE_PROVIDES_$(2))),)
|
|
# Inherit from target package BR2_PACKAGE_PROVIDES_FOO
|
|
$(2)_DEPENDENCIES += host-$$(call qstrip,$$(BR2_PACKAGE_PROVIDES_$(3)))
|
|
else
|
|
# BR2_PACKAGE_PROVIDES_HOST_<pkg> is explicitly defined
|
|
$(2)_DEPENDENCIES += $$(call qstrip,$$(BR2_PACKAGE_PROVIDES_$(2)))
|
|
endif
|
|
endif
|
|
|
|
# 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)
|