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# This Makefile fragment (since dpkg 1.16.1) defines the following
# vendor-related variables:
#
# DEB_VENDOR: output of «dpkg-vendor --query Vendor».
# DEB_PARENT_VENDOR: output of «dpkg-vendor --query Parent» (can be empty).
#
# This Makefile fragment also defines a set of "dpkg_vendor_derives_from"
# macros that can be used to verify if the current vendor derives from
# another vendor. The unversioned variant defaults to the v0 version if
# undefined or to the v1 version when on build API 1, otherwise it can be
# defined explicitly to one of the versions or the versioned macros can be
# used directly. The following are example usages:
#
# - dpkg_vendor_derives_from (since dpkg 1.16.1)
#
# ifeq ($(shell $(call dpkg_vendor_derives_from,ubuntu)),yes)
# ...
# endif
#
# - dpkg_vendor_derives_from_v0 (since dpkg 1.19.3)
#
# ifeq ($(shell $(call dpkg_vendor_derives_from_v0,ubuntu)),yes)
# ...
# endif
#
# - dpkg_vendor_derives_from_v1 (since dpkg 1.19.3)
#
# dpkg_vendor_derives_from = $(dpkg_vendor_derives_from_v1)
# ifeq ($(call dpkg_vendor_derives_from,ubuntu),yes)
# ...
# endif
# ifeq ($(call dpkg_vendor_derives_from_v1,ubuntu),yes)
# ...
# endif
ifndef dpkg_vendor_mk_included
dpkg_vendor_mk_included = yes
dpkg_datadir ?= $(dir $(lastword $(MAKEFILE_LIST)))
include $(dpkg_datadir)/buildapi.mk
dpkg_lazy_eval ?= $(eval $(1) = $(2)$$($(1)))
dpkg_lazy_set ?= $(call dpkg_lazy_eval,$(1),$$(eval $(1) := $(2)))
$(call dpkg_lazy_set,DEB_VENDOR,$$(shell dpkg-vendor --query Vendor))
$(call dpkg_lazy_set,DEB_PARENT_VENDOR,$$(shell dpkg-vendor --query Parent))
dpkg_vendor_derives_from_v0 = dpkg-vendor --derives-from $(1) && echo yes || echo no
dpkg_vendor_derives_from_v1 = $(shell $(dpkg_vendor_derives_from_v0))
ifeq ($(call dpkg_build_api_ge,1),yes)
dpkg_vendor_derives_from ?= $(dpkg_vendor_derives_from_v1)
else
dpkg_vendor_derives_from ?= $(dpkg_vendor_derives_from_v0)
endif
endif # dpkg_vendor_mk_included
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