Adding upstream version 1.22.4.upstream/1.22.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 971 insertions, 0 deletions

diff --git a/scripts/mk/Makefile.am b/scripts/mk/Makefile.am
new file mode 100644
index 0000000..257ba52
--- /dev/null
+++ b/scripts/mk/Makefile.am
@@ -0,0 +1,33 @@
+## Process this file with automake to produce Makefile.in
+
+dist_pkgdata_DATA = \
+	architecture.mk \
+	buildapi.mk \
+	buildflags.mk \
+	buildopts.mk \
+	buildtools.mk \
+	default.mk \
+	pkg-info.mk \
+	vendor.mk \
+	# EOL
+
+SUFFIXES =
+
+include $(top_srcdir)/build-aux/subst.am
+
+# Ideally we'd use '$(SED) -i', but unfortunately that's not portable.
+install-data-hook:
+	$(do_make_subst) <$(DESTDIR)$(pkgdatadir)/default.mk \
+	                 >$(DESTDIR)$(pkgdatadir)/default.mk.new
+	mv $(DESTDIR)$(pkgdatadir)/default.mk.new \
+	   $(DESTDIR)$(pkgdatadir)/default.mk
+
+	$(do_make_subst) <$(DESTDIR)$(pkgdatadir)/buildtools.mk \
+	                 >$(DESTDIR)$(pkgdatadir)/buildtools.mk.new
+	mv $(DESTDIR)$(pkgdatadir)/buildtools.mk.new \
+	   $(DESTDIR)$(pkgdatadir)/buildtools.mk
+
+	$(do_make_subst) <$(DESTDIR)$(pkgdatadir)/vendor.mk \
+			 >$(DESTDIR)$(pkgdatadir)/vendor.mk.new
+	mv $(DESTDIR)$(pkgdatadir)/vendor.mk.new \
+	   $(DESTDIR)$(pkgdatadir)/vendor.mk
diff --git a/scripts/mk/Makefile.in b/scripts/mk/Makefile.in
new file mode 100644
index 0000000..9860f84
--- /dev/null
+++ b/scripts/mk/Makefile.in
@@ -0,0 +1,662 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+	architecture.mk \
+	buildapi.mk \
+	buildflags.mk \
+	buildopts.mk \
+	buildtools.mk \
+	default.mk \
+	pkg-info.mk \
+	vendor.mk \
+	# EOL
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+	-e "s:^PKGDATADIR_DEFAULT=.*$$:PKGDATADIR_DEFAULT='$(pkgdatadir)':" \
+	-e "s:^version=['\"][^'\"]*[\"']:version=\"$(PACKAGE_VERSION)\":" \
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+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(DATA)
+installdirs:
+	for dir in "$(DESTDIR)$(pkgdatadir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+	-rm -f Makefile
+distclean-am: clean-am distclean-generic
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-dist_pkgdataDATA
+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) install-data-hook
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-dist_pkgdataDATA
+
+.MAKE: install-am install-data-am install-strip
+
+.PHONY: all all-am check check-am clean clean-generic clean-libtool \
+	cscopelist-am ctags-am distclean distclean-generic \
+	distclean-libtool distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am \
+	install-data-hook install-dist_pkgdataDATA install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags-am uninstall uninstall-am uninstall-dist_pkgdataDATA
+
+.PRECIOUS: Makefile
+
+
+.sh: Makefile
+	@test -d `dirname $@` || $(MKDIR_P) `dirname $@`
+	$(do_shell_subst) <$< >$@
+	$(AM_V_at) chmod +x $@
+
+.pl: Makefile
+	@test -d `dirname $@` || $(MKDIR_P) `dirname $@`
+	$(do_perl_subst) <$< >$@
+	$(AM_V_at) chmod +x $@
+
+# Ideally we'd use '$(SED) -i', but unfortunately that's not portable.
+install-data-hook:
+	$(do_make_subst) <$(DESTDIR)$(pkgdatadir)/default.mk \
+	                 >$(DESTDIR)$(pkgdatadir)/default.mk.new
+	mv $(DESTDIR)$(pkgdatadir)/default.mk.new \
+	   $(DESTDIR)$(pkgdatadir)/default.mk
+
+	$(do_make_subst) <$(DESTDIR)$(pkgdatadir)/buildtools.mk \
+	                 >$(DESTDIR)$(pkgdatadir)/buildtools.mk.new
+	mv $(DESTDIR)$(pkgdatadir)/buildtools.mk.new \
+	   $(DESTDIR)$(pkgdatadir)/buildtools.mk
+
+	$(do_make_subst) <$(DESTDIR)$(pkgdatadir)/vendor.mk \
+			 >$(DESTDIR)$(pkgdatadir)/vendor.mk.new
+	mv $(DESTDIR)$(pkgdatadir)/vendor.mk.new \
+	   $(DESTDIR)$(pkgdatadir)/vendor.mk
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/scripts/mk/architecture.mk b/scripts/mk/architecture.mk
new file mode 100644
index 0000000..c11cada
--- /dev/null
+++ b/scripts/mk/architecture.mk
@@ -0,0 +1,11 @@
+# This Makefile fragment (since dpkg 1.16.1) defines all the DEB_HOST_* and
+# DEB_BUILD_* variables that dpkg-architecture can return. Existing values
+# of those variables are preserved as per policy.
+
+dpkg_lazy_eval ?= $$(or $$(value DPKG_CACHE_$(1)),$$(eval DPKG_CACHE_$(1) := $$(shell $(2)))$$(value DPKG_CACHE_$(1)))
+
+dpkg_architecture_setvar = export $(1) ?= $(call dpkg_lazy_eval,$(1),dpkg-architecture -q$(1))
+
+$(foreach machine,BUILD HOST TARGET,\
+  $(foreach var,ARCH ARCH_ABI ARCH_LIBC ARCH_OS ARCH_CPU ARCH_BITS ARCH_ENDIAN GNU_CPU GNU_SYSTEM GNU_TYPE MULTIARCH,\
+    $(eval $(call dpkg_architecture_setvar,DEB_$(machine)_$(var)))))
diff --git a/scripts/mk/buildapi.mk b/scripts/mk/buildapi.mk
new file mode 100644
index 0000000..668e325
--- /dev/null
+++ b/scripts/mk/buildapi.mk
@@ -0,0 +1,9 @@
+# This Makefile fragment (since dpkg 1.22.0) handles the build API.
+
+# Default API level when not set.
+DPKG_BUILD_API ?= $(shell dpkg-buildapi)
+
+# We could use only built-in GNU make functions, but that seems too much
+# complexity given no integer operators, given that we currently have to
+# fetch the build API level anyway.
+dpkg_build_api_ge = $(shell test "$(DPKG_BUILD_API)" -ge "$(1)" && echo yes)
diff --git a/scripts/mk/buildflags.mk b/scripts/mk/buildflags.mk
new file mode 100644
index 0000000..4b8a3d8
--- /dev/null
+++ b/scripts/mk/buildflags.mk
@@ -0,0 +1,79 @@
+# This Makefile fragment (since dpkg 1.16.1) defines the following host
+# variables:
+#
+#   ASFLAGS: flags for the host assembler (since 1.21.0).
+#   CFLAGS: flags for the host C compiler.
+#   CPPFLAGS: flags for the host C preprocessor.
+#   CXXFLAGS: flags for the host C++ compiler.
+#   OBJCFLAGS: flags for the host Objective C compiler.
+#   OBJCXXFLAGS: flags for the host Objective C++ compiler.
+#   DFLAGS: flags for the host D compiler.
+#   FFLAGS: flags for the host Fortran 77 compiler.
+#   FCFLAGS: flags for the host Fortran 9x compiler.
+#   LDFLAGS: flags for the host linker.
+#
+# And the following variables for the build tools (since dpkg 1.22.1):
+#
+#   ASFLAGS_FOR_BUILD: flags for the build assembler.
+#   CFLAGS_FOR_BUILD: flags for the build C compiler.
+#   CPPFLAGS_FOR_BUILD: flags for the build C preprocessor.
+#   CXXFLAGS_FOR_BUILD: flags for the build C++ compiler.
+#   OBJCFLAGS_FOR_BUILD: flags for the build Objective C compiler.
+#   OBJCXXFLAGS_FOR_BUILD: flags for the build Objective C++ compiler.
+#   DFLAGS_FOR_BUILD: flags for the build D compiler.
+#   FFLAGS_FOR_BUILD: flags for the build Fortran 77 compiler.
+#   FCFLAGS_FOR_BUILD: flags for the build Fortran 9x compiler.
+#   LDFLAGS_FOR_BUILD: flags for the build linker.
+#
+# You can also export them in the environment by setting
+# DPKG_EXPORT_BUILDFLAGS to a non-empty value.
+#
+# This list is kept in sync with the default set of flags returned
+# by dpkg-buildflags.
+
+dpkg_lazy_eval ?= $$(or $$(value DPKG_CACHE_$(1)),$$(eval DPKG_CACHE_$(1) := $$(shell $(2)))$$(value DPKG_CACHE_$(1)))
+
+DPKG_BUILDFLAGS_LIST = \
+  ASFLAGS \
+  ASFLAGS_FOR_BUILD \
+  CFLAGS \
+  CFLAGS_FOR_BUILD \
+  CPPFLAGS \
+  CPPFLAGS_FOR_BUILD \
+  CXXFLAGS \
+  CXXFLAGS_FOR_BUILD \
+  OBJCFLAGS \
+  OBJCFLAGS_FOR_BUILD \
+  OBJCXXFLAGS \
+  OBJCXXFLAGS_FOR_BUILD \
+  DFLAGS \
+  DFLAGS_FOR_BUILD \
+  FFLAGS \
+  FFLAGS_FOR_BUILD \
+  FCFLAGS \
+  FCFLAGS_FOR_BUILD \
+  LDFLAGS \
+  LDFLAGS_FOR_BUILD \
+  # EOL
+
+define dpkg_buildflags_export_envvar
+  ifdef $(1)
+    DPKG_BUILDFLAGS_EXPORT_ENVVAR += $(1)="$$(value $(1))"
+  endif
+endef
+
+$(eval $(call dpkg_buildflags_export_envvar,DEB_BUILD_OPTIONS))
+$(eval $(call dpkg_buildflags_export_envvar,DEB_BUILD_MAINT_OPTIONS))
+$(eval $(call dpkg_buildflags_export_envvar,DEB_BUILD_PATH))
+$(foreach flag,$(DPKG_BUILDFLAGS_LIST),\
+  $(foreach operation,SET STRIP APPEND PREPEND,\
+    $(eval $(call dpkg_buildflags_export_envvar,DEB_$(flag)_MAINT_$(operation)))))
+
+dpkg_buildflags_setvar = $(1) = $(call dpkg_lazy_eval,$(1),$(DPKG_BUILDFLAGS_EXPORT_ENVVAR) dpkg-buildflags --get $(1))
+
+$(foreach flag,$(DPKG_BUILDFLAGS_LIST),\
+  $(eval $(call dpkg_buildflags_setvar,$(flag))))
+
+ifdef DPKG_EXPORT_BUILDFLAGS
+  export $(DPKG_BUILDFLAGS_LIST)
+endif
diff --git a/scripts/mk/buildopts.mk b/scripts/mk/buildopts.mk
new file mode 100644
index 0000000..c957777
--- /dev/null
+++ b/scripts/mk/buildopts.mk
@@ -0,0 +1,10 @@
+# This Makefile fragment (since dpkg 1.20.1) parses option arguments from
+# DEB_BUILD_OPTIONS, and exposes these as variables.
+#
+# Defines the following variables:
+#
+#   DEB_BUILD_OPTION_PARALLEL: the argument for the parallel=N option.
+
+ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
+  DEB_BUILD_OPTION_PARALLEL = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
+endif
diff --git a/scripts/mk/buildtools.mk b/scripts/mk/buildtools.mk
new file mode 100644
index 0000000..933fdcf
--- /dev/null
+++ b/scripts/mk/buildtools.mk
@@ -0,0 +1,76 @@
+# This Makefile fragment (since dpkg 1.19.0) defines the following variables
+# for host tools:
+#
+#   AS: assembler (since dpkg 1.19.1).
+#   CPP: C preprocessor.
+#   CC: C compiler.
+#   CXX: C++ compiler.
+#   OBJC: Objective C compiler.
+#   OBJCXX: Objective C++ compiler.
+#   F77: Fortran 77 compiler.
+#   FC: Fortran 9x compiler.
+#   LD: linker.
+#   STRIP: strip objects (since dpkg 1.19.1).
+#   OBJCOPY: copy objects (since dpkg 1.19.1).
+#   OBJDUMP: dump objects (since dpkg 1.19.1).
+#   NM: names lister (since dpkg 1.19.1).
+#   AR: archiver (since dpkg 1.19.1).
+#   RANLIB: archive index generator (since dpkg 1.19.1).
+#   PKG_CONFIG: pkg-config tool.
+#   QMAKE: Qt build system generator (since dpkg 1.20.0).
+#
+# All the above variables have a counterpart variable for the build tool,
+# as in CC → CC_FOR_BUILD.
+#
+# The variables are not exported by default. This can be changed by
+# defining DPKG_EXPORT_BUILDTOOLS.
+
+dpkg_datadir = $(srcdir)/mk
+include $(dpkg_datadir)/architecture.mk
+
+# We set the TOOL_FOR_BUILD variables to the specified value, and the TOOL
+# variables (for the host) to their triplet-prefixed form iff they are
+# not defined or contain the make built-in defaults. On native builds if
+# TOOL is defined and TOOL_FOR_BUILD is not, we fallback to use TOOL.
+define dpkg_buildtool_setvar
+  ifeq (,$(findstring $(3),$(DEB_BUILD_OPTIONS)))
+    ifeq ($(origin $(1)),default)
+      $(1) = $(DEB_HOST_GNU_TYPE)-$(2)
+    else
+      $(1) ?= $(DEB_HOST_GNU_TYPE)-$(2)
+    endif
+
+    # On native build fallback to use TOOL if that's defined.
+    ifeq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
+      $(1)_FOR_BUILD ?= $$($(1))
+    else
+      $(1)_FOR_BUILD ?= $(DEB_BUILD_GNU_TYPE)-$(2)
+    endif
+  else
+    $(1) = :
+    $(1)_FOR_BUILD = :
+  endif
+
+  ifdef DPKG_EXPORT_BUILDTOOLS
+    export $(1)
+    export $(1)_FOR_BUILD
+  endif
+endef
+
+$(eval $(call dpkg_buildtool_setvar,AS,as))
+$(eval $(call dpkg_buildtool_setvar,CPP,gcc -E))
+$(eval $(call dpkg_buildtool_setvar,CC,gcc))
+$(eval $(call dpkg_buildtool_setvar,CXX,g++))
+$(eval $(call dpkg_buildtool_setvar,OBJC,gcc))
+$(eval $(call dpkg_buildtool_setvar,OBJCXX,g++))
+$(eval $(call dpkg_buildtool_setvar,F77,gfortran))
+$(eval $(call dpkg_buildtool_setvar,FC,gfortran))
+$(eval $(call dpkg_buildtool_setvar,LD,ld))
+$(eval $(call dpkg_buildtool_setvar,STRIP,strip,nostrip))
+$(eval $(call dpkg_buildtool_setvar,OBJCOPY,objcopy))
+$(eval $(call dpkg_buildtool_setvar,OBJDUMP,objdump))
+$(eval $(call dpkg_buildtool_setvar,NM,nm))
+$(eval $(call dpkg_buildtool_setvar,AR,ar))
+$(eval $(call dpkg_buildtool_setvar,RANLIB,ranlib))
+$(eval $(call dpkg_buildtool_setvar,PKG_CONFIG,pkgconf))
+$(eval $(call dpkg_buildtool_setvar,QMAKE,qmake))
diff --git a/scripts/mk/default.mk b/scripts/mk/default.mk
new file mode 100644
index 0000000..0b2fd4a
--- /dev/null
+++ b/scripts/mk/default.mk
@@ -0,0 +1,13 @@
+# This Makefile fragment (since dpkg 1.16.1) includes all the Makefile
+# fragments that define variables that can be useful within debian/rules.
+
+dpkg_datadir = $(srcdir)/mk
+include $(dpkg_datadir)/architecture.mk
+include $(dpkg_datadir)/buildapi.mk
+ifeq ($(call dpkg_build_api_ge,1),yes)
+include $(dpkg_datadir)/buildtools.mk
+endif
+include $(dpkg_datadir)/buildflags.mk
+include $(dpkg_datadir)/buildopts.mk
+include $(dpkg_datadir)/pkg-info.mk
+include $(dpkg_datadir)/vendor.mk
diff --git a/scripts/mk/pkg-info.mk b/scripts/mk/pkg-info.mk
new file mode 100644
index 0000000..bccde23
--- /dev/null
+++ b/scripts/mk/pkg-info.mk
@@ -0,0 +1,27 @@
+# This Makefile fragment (since dpkg 1.16.1) defines the following package
+# information variables:
+#
+#   DEB_SOURCE: source package name.
+#   DEB_VERSION: package's full version (epoch + upstream vers. + revision).
+#   DEB_VERSION_EPOCH_UPSTREAM: package's version without the Debian revision.
+#   DEB_VERSION_UPSTREAM_REVISION: package's version without the Debian epoch.
+#   DEB_VERSION_UPSTREAM: package's upstream version.
+#   DEB_DISTRIBUTION: distribution(s) listed in the current debian/changelog
+#     entry.
+#
+#   SOURCE_DATE_EPOCH: source release date as seconds since the epoch, as
+#     specified by <https://reproducible-builds.org/specs/source-date-epoch/>
+#     (since dpkg 1.18.8).
+
+dpkg_late_eval ?= $(or $(value DPKG_CACHE_$(1)),$(eval DPKG_CACHE_$(1) := $(shell $(2)))$(value DPKG_CACHE_$(1)))
+
+DEB_SOURCE = $(call dpkg_late_eval,DEB_SOURCE,dpkg-parsechangelog -SSource)
+DEB_VERSION = $(call dpkg_late_eval,DEB_VERSION,dpkg-parsechangelog -SVersion)
+DEB_VERSION_EPOCH_UPSTREAM = $(call dpkg_late_eval,DEB_VERSION_EPOCH_UPSTREAM,echo '$(DEB_VERSION)' | sed -e 's/-[^-]*$$//')
+DEB_VERSION_UPSTREAM_REVISION = $(call dpkg_late_eval,DEB_VERSION_UPSTREAM_REVISION,echo '$(DEB_VERSION)' | sed -e 's/^[0-9]*://')
+DEB_VERSION_UPSTREAM = $(call dpkg_late_eval,DEB_VERSION_UPSTREAM,echo '$(DEB_VERSION_EPOCH_UPSTREAM)' | sed -e 's/^[0-9]*://')
+DEB_DISTRIBUTION = $(call dpkg_late_eval,DEB_DISTRIBUTION,dpkg-parsechangelog -SDistribution)
+
+SOURCE_DATE_EPOCH ?= $(call dpkg_late_eval,SOURCE_DATE_EPOCH,dpkg-parsechangelog -STimestamp)
+
+export SOURCE_DATE_EPOCH
diff --git a/scripts/mk/vendor.mk b/scripts/mk/vendor.mk
new file mode 100644
index 0000000..f3241a5
--- /dev/null
+++ b/scripts/mk/vendor.mk
@@ -0,0 +1,51 @@
+# This Makefile fragment (since dpkg 1.16.1) defines the following
+# vendor-related variables:
+#
+#   DEB_VENDOR: output of «dpkg-vendor --query Vendor».
+#   DEB_PARENT_VENDOR: output of «dpkg-vendor --query Parent» (can be empty).
+#
+# This Makefile fragment also defines a set of "dpkg_vendor_derives_from"
+# macros that can be used to verify if the current vendor derives from
+# another vendor. The unversioned variant defaults to the v0 version if
+# undefined or to the v1 version when on build API 1, otherwise it can be
+# defined explicitly to one of the versions or the versioned macros can be
+# used directly. The following are example usages:
+#
+# - dpkg_vendor_derives_from (since dpkg 1.16.1)
+#
+#   ifeq ($(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
+
+dpkg_datadir = $(srcdir)/mk
+include $(dpkg_datadir)/buildapi.mk
+
+dpkg_late_eval ?= $(or $(value DPKG_CACHE_$(1)),$(eval DPKG_CACHE_$(1) := $(shell $(2)))$(value DPKG_CACHE_$(1)))
+
+DEB_VENDOR = $(call dpkg_late_eval,DEB_VENDOR,dpkg-vendor --query Vendor)
+DEB_PARENT_VENDOR = $(call dpkg_late_eval,DEB_PARENT_VENDOR,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