# -*- makefile -*-
# definitions used in more than one Makefile / rules file

# common vars
SHELL		= /bin/bash -e	# brace expansion used in rules file
PWD		:= $(shell pwd)
srcdir		= $(PWD)/src
builddir	= $(PWD)/build
builddir_jit	= $(PWD)/build-jit
builddir_hppa64	= $(PWD)/build-hppa64
stampdir	= stamps

distribution	:= $(shell lsb_release -is)
distrelease	:= $(shell lsb_release -cs)
derivative	:= $(shell if dpkg-vendor --derives-from Ubuntu; then echo Ubuntu; \
			elif dpkg-vendor --derives-from Debian; then echo Debian; \
			else echo Unknown; fi)

# On non official archives, "lsb_release -cs" default to "n/a". Assume
# sid in that case 
ifeq ($(distrelease),n/a)
distrelease	:= sid
endif

on_buildd := $(shell [ -f /CurrentlyBuilding -o "$$LOGNAME" = buildd ] && echo yes)

# creates {srcdir,builddir}_{hppa64,neon}
$(foreach x,srcdir builddir,$(foreach target,hppa64 neon,$(eval \
  $(x)_$(target) := $($(x))-$(target))))

# for architecture dependent variables and changelog vars
vafilt = $(subst $(2)=,,$(filter $(2)=%,$(1)))
# for rules.sonames
vafilt_defined = 1

dpkg_target_vars := $(shell (dpkg-architecture | grep -q DEB_TARGET) && echo yes)
ifeq ($(dpkg_target_vars),yes)
  DEB_TARGET_ARCH=
  DEB_TARGET_ARCH_BITS=
  DEB_TARGET_ARCH_CPU=
  DEB_TARGET_ARCH_ENDIAN=
  DEB_TARGET_ARCH_OS=
  DEB_TARGET_GNU_CPU=
  DEB_TARGET_GNU_SYSTEM=
  DEB_TARGET_GNU_TYPE=
  DEB_TARGET_MULTIARCH=
endif

DPKG_VARS		:= $(shell dpkg-architecture)
ifeq ($(dpkg_target_vars),yes)
  DPKG_VARS		:= $(filter-out DEB_TARGET_%, $(DPKG_VARS))
endif
DEB_BUILD_ARCH		?= $(call vafilt,$(DPKG_VARS),DEB_BUILD_ARCH)
DEB_BUILD_GNU_TYPE	?= $(call vafilt,$(DPKG_VARS),DEB_BUILD_GNU_TYPE)
DEB_BUILD_MULTIARCH	?= $(call vafilt,$(DPKG_VARS),DEB_BUILD_MULTIARCH)
DEB_HOST_ARCH		?= $(call vafilt,$(DPKG_VARS),DEB_HOST_ARCH)
DEB_HOST_GNU_CPU	?= $(call vafilt,$(DPKG_VARS),DEB_HOST_GNU_CPU)
DEB_HOST_GNU_SYSTEM	?= $(call vafilt,$(DPKG_VARS),DEB_HOST_GNU_SYSTEM)
DEB_HOST_GNU_TYPE	?= $(call vafilt,$(DPKG_VARS),DEB_HOST_GNU_TYPE)
DEB_HOST_MULTIARCH	?= $(call vafilt,$(DPKG_VARS),DEB_HOST_MULTIARCH)

ifeq ($(derivative),Ubuntu)
  ifeq (,$(filter $(distrelease),dapper hardy lucid precise quantal raring saucy trusty))
    ifeq ($(DEB_BUILD_GNU_TYPE),i486-linux-gnu)
      DEB_BUILD_GNU_TYPE = i686-linux-gnu
    endif
    ifeq ($(DEB_HOST_GNU_TYPE),i486-linux-gnu)
      DEB_HOST_GNU_TYPE	= i686-linux-gnu
    endif
  endif
else
  ifeq (,$(filter $(distrelease),lenny etch squeeze wheezy))
    ifeq ($(DEB_BUILD_GNU_TYPE),i486-linux-gnu)
      DEB_BUILD_GNU_TYPE = i586-linux-gnu
    endif
    ifeq ($(DEB_HOST_GNU_TYPE),i486-linux-gnu)
      DEB_HOST_GNU_TYPE	= i586-linux-gnu
    endif
  endif
endif

CHANGELOG_VARS := $(shell dpkg-parsechangelog | \
	sed -n 's/ /_/g;/^[^_]/s/^\([^:]*\):_\(.*\)/\1=\2/p')

# the name of the source package
PKGSOURCE := $(call vafilt,$(CHANGELOG_VARS),Source)
# those are required here too
SOURCE_VERSION := $(call vafilt,$(CHANGELOG_VARS),Version)
DEB_VERSION := $(strip $(shell echo $(SOURCE_VERSION) | \
        sed -e 's/.*://' -e 's/ds[0-9]*//'))
# epoch used for gcc versions up to 3.3.x, now used for some remaining
# libraries: libgcc1, libobjc1
EPOCH := 1
DEB_EVERSION := $(EPOCH):$(DEB_VERSION)
BASE_VERSION := $(shell echo $(DEB_VERSION) | sed -e 's/\([1-9]\).*-.*/\1/')

# push glibc stack traces into stderr
export LIBC_FATAL_STDERR_=1

# ---------------------------------------------------------------------------
# set target
# - GNU triplet via DEB_TARGET_GNU_TYPE
# - Debian arch in debian/target
# - Debian arch via DEB_GCC_TARGET or GCC_TARGET
#
# alias
ifdef GCC_TARGET
  DEB_GCC_TARGET := $(GCC_TARGET)
endif
ifdef DEB_TARGET_GNU_TYPE
  TARGET_VARS := $(shell dpkg-architecture -f -t$(DEB_TARGET_GNU_TYPE) 2>/dev/null)
else
  # allow debian/target to be used instead of DEB_GCC_TARGET - this was requested
  # by toolchain-source maintainer
  DEBIAN_TARGET_FILE := $(strip $(if $(wildcard debian/target),$(shell cat debian/target 2>/dev/null)))
  ifndef DEB_TARGET_ARCH
    ifneq (,$(DEBIAN_TARGET_FILE))
      DEB_TARGET_ARCH := $(DEBIAN_TARGET_FILE)
    else
      ifdef DEB_GCC_TARGET
        DEB_TARGET_ARCH := $(DEB_GCC_TARGET)
      else
        DEB_TARGET_ARCH := $(DEB_HOST_ARCH)
      endif
    endif
  endif
  TARGET_VARS := $(shell dpkg-architecture -f -a$(DEB_TARGET_ARCH) 2>/dev/null)
endif
ifeq ($(dpkg_target_vars),yes)
  TARGET_VARS		:= $(filter-out DEB_TARGET_%, $(TARGET_VARS))
endif

DEB_TARGET_ARCH		:= $(call vafilt,$(TARGET_VARS),DEB_HOST_ARCH)
DEB_TARGET_ARCH_OS	:= $(call vafilt,$(TARGET_VARS),DEB_HOST_ARCH_OS)
DEB_TARGET_ARCH_CPU	:= $(call vafilt,$(TARGET_VARS),DEB_HOST_ARCH_CPU)
DEB_TARGET_GNU_CPU	:= $(call vafilt,$(TARGET_VARS),DEB_HOST_GNU_CPU)
DEB_TARGET_GNU_TYPE	:= $(call vafilt,$(TARGET_VARS),DEB_HOST_GNU_TYPE)
DEB_TARGET_GNU_SYSTEM	:= $(call vafilt,$(TARGET_VARS),DEB_HOST_GNU_SYSTEM)
DEB_TARGET_MULTIARCH	:= $(call vafilt,$(TARGET_VARS),DEB_HOST_MULTIARCH)

ifeq (,$(filter $(distrelease),dapper lucid))
  ifeq ($(DEB_TARGET_GNU_TYPE),i486-linux-gnu)
    DEB_TARGET_GNU_TYPE	= i586-linux-gnu
  endif
endif

ifeq ($(DEB_TARGET_ARCH),)
  $(error Invalid architecure.)
endif

# Force this, people get confused about the default. See #760770.
override with_deps_on_target_arch_pkgs :=

# including unversiond symlinks for binaries
#with_unversioned = yes

# ---------------------------------------------------------------------------
# cross-compiler config
ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
  ifneq ($(DEB_HOST_GNU_TYPE),$(DEB_TARGET_GNU_TYPE))
    # cross building a cross compiler, untested.
    DEB_CROSS = yes
    build_type = cross-build-cross
  else
    # cross building the native compiler
    ifeq (,$(filter $(distrelease),lenny etch squeeze dapper hardy jaunty karmic lucid))
      with_sysroot = /
    endif
    build_type = cross-build-native
  endif
else
  ifneq ($(DEB_HOST_GNU_TYPE),$(DEB_TARGET_GNU_TYPE))
    # cross compiler, sets WITH_SYSROOT on it's own
    DEB_CROSS = yes
    build_type = build-cross
  else
    # native build
    # first ones are wheezy and maverick
    ifeq (,$(filter $(distrelease),lenny etch squeeze dapper hardy jaunty karmic lucid))
      with_sysroot = /
    endif
    build_type = build-native
  endif
endif

# ---------------------------------------------------------------------------
# cross compiler support
ifeq ($(DEB_CROSS),yes)
  # TARGET: Alias to DEB_TARGET_ARCH (Debian arch name)
  # TP: Target Prefix. Used primarily as a prefix for cross tool
  #     names (e.g. powerpc-linux-gcc).
  # TS: Target Suffix. Used primarily at the end of cross compiler
  #     package names (e.g. gcc-powerpc).
  # LS: Library Suffix. Used primarily at the end of cross compiler
  #     library package names (e.g. libgcc-powerpc-cross).
  # AQ: Arch Qualifier. Used for cross-arch dependencies
  DEB_TARGET_ALIAS ?= $(DEB_TARGET_GNU_TYPE)
  TARGET := $(DEB_TARGET_ARCH)
  TP :=  $(subst _,-,$(DEB_TARGET_GNU_TYPE))-
  TS := -$(subst _,-,$(DEB_TARGET_ALIAS))
  LS := -$(subst _,-,$(DEB_TARGET_ARCH))-cross
  AQ :=

  cross_bin_arch := -$(subst _,-,$(DEB_TARGET_ALIAS))
  cross_lib_arch := -$(subst _,-,$(DEB_TARGET_ARCH))-cross
  cmd_prefix := $(DEB_TARGET_GNU_TYPE)-

  TARGET_ALIAS := $(DEB_TARGET_ALIAS)

  lib_binaries := indep_binaries
  cross_shlibdeps =  DEB_HOST_ARCH=$(TARGET) ARCH=$(DEB_TARGET_ARCH) MAKEFLAGS="CC=something"
  cross_gencontrol = DEB_HOST_ARCH=$(TARGET)
  cross_makeshlibs = DEB_HOST_ARCH=$(TARGET)
  cross_clean = DEB_HOST_ARCH=$(TARGET)
else
  TARGET_ALIAS := $(DEB_TARGET_GNU_TYPE)

  ifeq ($(TARGET_ALIAS),i386-gnu)
    TARGET_ALIAS := i586-gnu
  endif

  cmd_prefix :=

  #ifeq ($(TARGET_ALIAS),i486-linux-gnu)
  #  TARGET_ALIAS := i686-linux-gnu
  #endif

  TARGET_ALIAS := $(subst i386,i486,$(TARGET_ALIAS))

  # configure as linux-gnu, not linux
  #ifeq ($(findstring linux,$(TARGET_ALIAS))/$(findstring linux-gnu,$(TARGET_ALIAS)),linux/)
  #  TARGET_ALIAS := $(TARGET_ALIAS)-gnu
  #endif

  # configure as linux, not linux-gnu
  #TARGET_ALIAS := $(subst linux-gnu,linux,$(TARGET_ALIAS))

  lib_binaries := arch_binaries
  cross_shlibdeps :=
  cross_gencontrol :=
  cross_makeshlibs :=
  cross_clean :=
endif

printarch:
	@echo DEB_TARGET_ARCH: $(DEB_TARGET_ARCH)
	@echo DEB_TARGET_ARCH_OS: $(DEB_TARGET_ARCH_OS)
	@echo DEB_TARGET_ARCH_CPU: $(DEB_TARGET_ARCH_CPU)
	@echo DEB_TARGET_GNU_SYSTEM: $(DEB_TARGET_GNU_SYSTEM)
	@echo DEB_TARGET_MULTIARCH: $(DEB_TARGET_MULTIARCH)
	@echo MULTIARCH_CONFARG: $(MULTIARCH_CONFARG)
	@echo TARGET_ALIAS: $(TARGET_ALIAS)
	@echo TP: $(TP)
	@echo TS: $(TS)

# -------------------------------------------------------------------
# bootstrap options
ifdef WITH_BOOTSTRAP
  # "yes" is the default and causes a 3-stage bootstrap.
  # "off" runs a complete build with --disable-bootstrap
  # "no" means to just build the first stage, and not create the stage1
  # directory.
  # "lean" means a lean 3-stage bootstrap, i.e. delete each stage when no
  # longer needed.
  with_bootstrap = $(WITH_BOOTSTRAP)
endif
ifneq ($(findstring nostrap, $(DEB_BUILD_OPTIONS)),)
  with_bootstrap := off
endif

# -------------------------------------------------------------------
# stage options
ifdef DEB_STAGE
  with_cdev := yes
  separate_lang := yes
  # "stage1" is minimal compiler with static libgcc
  # "stage2" is minimal compiler with shared libgcc
  # "rtlibs" is a subset of target libraries, without compilers
  ifeq ($(DEB_STAGE),stage1)
    with_shared_libgcc := no
  endif
  ifeq ($(DEB_STAGE),stage2)
    with_libgcc := yes
    with_shared_libgcc := yes
  endif
  ifeq ($(DEB_STAGE),rtlibs)
    with_rtlibs := libgcc libgomp libstdc++ libgfortran libquadmath
    ifeq ($(DEB_CROSS),yes)
      LS :=
      TS :=
      cross_lib_arch :=
    endif
  endif
endif

ifeq ($(BACKPORT),true)
  with_dev := no
  with_source := yes
  with_base_only := yes
endif

# -------------------------------------------------------------------
# sysroot options
ifdef WITH_SYSROOT
  with_sysroot = $(WITH_SYSROOT)
endif
ifdef WITH_BUILD_SYSROOT
  with_build_sysroot = $(WITH_BUILD_SYSROOT)
endif

# -------------------------------------------------------------------
# for components configuration

COMMA = ,
SPACE = $(EMPTY) $(EMPTY)

# lang= overwrites all of nolang=, overwrites all of WITHOUT_LANG

DEB_LANG_OPT	:= $(filter lang=%,$(DEB_BUILD_OPTIONS))
DEB_LANG	:= $(strip $(subst $(COMMA), ,$(patsubst lang=%,%,$(DEB_LANG_OPT))))
DEB_NOLANG_OPT	:= $(filter nolang=%,$(DEB_BUILD_OPTIONS))
DEB_NOLANG	:= $(strip $(subst $(COMMA), ,$(patsubst nolang=%,%,$(DEB_NOLANG_OPT))))
lfilt	= $(strip $(if $(DEB_LANG), \
		$(if $(filter $(1) $(2),$(DEB_LANG)),yes),$(3)))
nlfilt	= $(strip $(if $(DEB_NOLANG), \
		$(if $(filter $(1) $(2),$(DEB_NOLANG)),disabled by $(DEB_NOLANG_OPT),$(3))))
wlfilt	= $(strip $(if $(filter $(1) $(2), $(subst $(COMMA), ,$(WITHOUT_LANG))), \
		disabled by WITHOUT_LANG=$(WITHOUT_LANG),$(3)))
envfilt	= $(strip $(or $(call lfilt,$(1),$(2)),$(call nlfilt,$(1),$(3)),$(call wlfilt,$(1),$(3)),$(4)))

# -------------------------------------------------------------------
# architecture specific config

# FIXME: libjava is not ported for thumb, this hack only works for
# separate gcj builds
ifeq (,$(findstring gcj,$(PKGSOURCE)))
  ifeq ($(DEB_TARGET_ARCH),armhf)
    ifeq ($(distribution),Raspbian)
      with_arm_thumb := no
    else
      with_arm_thumb := yes
    endif
  else
    ifeq ($(derivative)-$(DEB_TARGET_ARCH),Ubuntu-armel)
      ifneq (,$(filter $(distrelease),lucid maverick natty oneiric precise))
        with_arm_thumb := yes
      endif
    endif
  endif
endif

# build using fsf or linaro
ifeq ($(distribution),Ubuntu)
  ifeq (,$(findstring gnat, $(PKGSOURCE)))
  #ifneq (,$(findstring $(DEB_TARGET_ARCH),arm64 armel armhf))
  #  with_linaro_branch = yes
  #endif
  endif
endif

# check if we're building for armel or armhf
ifeq ($(DEB_TARGET_ARCH),armhf)
  float_abi := hard
else ifneq (,$(filter $(distribution)-$(DEB_TARGET_ARCH), Ubuntu-armel))
  ifneq (,$(filter $(distrelease),lucid maverick natty oneiric precise))
    float_abi := softfp
  else
    float_abi := soft
  endif
else ifneq (,$(filter $(DEB_TARGET_ARCH), arm armel))
  float_abi := soft
endif

# -------------------------------------------------------------------
# basic config

# allows to wrote backtraces for ICEs
unstripped_exe = yes

# common things ---------------
# build common packages, where package names don't differ in different
# gcc versions (fixincludes, libgcj-common) ...
with_common_pkgs := yes
# ... and some libraries, which do not change (libgcc1, libssp0).
with_common_libs := yes
# XXX: should with_common_libs be "yes" only if this is the default compiler
# version on the targeted arch?

# is this a multiarch-enabled build?
ifeq (,$(filter $(distrelease),lenny etch squeeze dapper hardy jaunty karmic lucid maverick))
  with_multiarch_lib := yes
endif

ifeq ($(with_multiarch_lib),yes)
  ifneq ($(single_package),yes)
    ifneq ($(DEB_CROSS),yes)
      with_multiarch_cxxheaders := yes
    endif
  endif
endif

ifeq (,$(filter $(distrelease),lenny etch squeeze dapper hardy jaunty karmic lucid maverick))
  multiarch_stage1 := yes
endif

# mapping for the non-default biarch multilib / multiarch names
multiarch_xarch_map = \
	amd64=i386-linux-gnu,x86_64-linux-gnux32 \
	armel=arm-linux-gnueabi \
	armhf=arm-linux-gnueabihf \
	i386=x86_64-linux-gnu,x86_64-linux-gnux32 \
	powerpc=powerpc64-linux-gnu \
	ppc64=powerpc-linux-gnu \
	sparc=sparc64-linux-gnu \
	sparc64=sparc-linux-gnu \
	s390=s390x-linux-gnu \
	s390x=s390-linux-gnu \
	mips=mips64-linux-gnuabin32,mips64-linux-gnuabi64 \
	mipsel=mips64el-linux-gnuabin32,mips64el-linux-gnuabi64 \
	mipsn32=mips-linux-gnu,mips64-linux-gnuabi64 \
	mipsn32el=mipsel-linux-gnu,mips64el-linux-gnuabi64 \
	mips64=mips-linux-gnu,mips64-linux-gnuabin32 \
	mips64el=mipsel-linux-gnu,mips64el-linux-gnuabin32 \
	x32=x86_64-linux-gnu,i386-linux-gnu \
	kfreebsd-amd64=i386-kfreebsd-gnu
xarch_multiarch_names = $(subst $(COMMA),$(SPACE),$(patsubst $(DEB_TARGET_ARCH)=%,%, \
		$(filter $(DEB_TARGET_ARCH)=%,$(multiarch_xarch_map))))

multilib_multiarch_map = \
	$(DEB_TARGET_ARCH)/=$(DEB_TARGET_MULTIARCH) \
	amd64/32=i386-linux-gnu \
	amd64/x32=x86_64-linux-gnux32 \
	armel/hf=arm-linux-gnueabihf \
	armhf/sf=arm-linux-gnueabi \
	i386/64=x86_64-linux-gnu \
	i386/x32=x86_64-linux-gnux32 \
	powerpc/64=powerpc64-linux-gnu \
	ppc64/32=powerpc-linux-gnu \
	sparc/64=sparc64-linux-gnu \
	sparc64/32=sparc-linux-gnu \
	s390/64=s390x-linux-gnu \
	s390x/32=s390-linux-gnu \
	mips/n32=mips64-linux-gnuabin32 \
	mips/64=mips64-linux-gnuabi64 \
	mipsel/n32=mips64el-linux-gnuabin32 \
	mipsel/64=mips64el-linux-gnuabi64 \
	mipsn32/32=mips-linux-gnu \
	mipsn32/64=mips64-linux-gnuabi64 \
	mipsn32el/32=mipsel-linux-gnu \
	mipsn32el/64=mips64el-linux-gnuabi64 \
	mips64/32=mips-linux-gnu \
	mips64/n32=mips64-linux-gnuabin32 \
	mips64el/32=mipsel-linux-gnu \
	mips64el/n32=mips64el-linux-gnuabin32 \
	x32/32=i386-linux-gnu \
	x32/64=x86_64-linux-gnu \
	kfreebsd-amd64/32=i386-kfreebsd-gnu
# $(call mlib_to_march,<empty>|32|64|n32|x32|hf|sf)
mlib_to_march = $(patsubst $(DEB_TARGET_ARCH)/$(1)=%,%, \
		   $(filter $(DEB_TARGET_ARCH)/$(1)=%,$(multilib_multiarch_map)))

# build -base packages
with_gccbase := yes
ifeq ($(build_type),build-cross)
  ifneq ($(DEB_STAGE),rtlibs)
    with_gcclbase := yes
  endif
endif

# build dev packages.
ifneq ($(DEB_STAGE),rtlibs)
  with_dev := yes
endif

with_cpp := yes

# set lang when built from a different source package.
separate_lang := no

ifneq (,$(findstring gcc-snapshot, $(PKGSOURCE)))
  single_package = yes
  trunk_build = yes
  with_linaro_branch =
else ifneq (,$(findstring gcc-linaro, $(PKGSOURCE)))
  single_package = yes
  trunk_build = no
else
  # --program-suffix=-$(BASE_VERSION)
  versioned_packages := yes
endif

#no_dummy_cpus := ia64 i386 hppa s390 sparc
#ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(no_dummy_cpus)))
#  with_base_only	:= no
#  with_common_libs	:= yes
#  with_common_pkgs	:= yes
#else
#  with_base_only	:= yes
#  with_common_libs	:= no
#  with_common_pkgs	:= no
#  with_dev		:= no
#endif

ifeq ($(versioned_packages),yes)
  pkg_ver := -$(BASE_VERSION)
  PV := $(pkg_ver)
endif

# -------------------------------------------------------------------
# configure languages

# C ---------------------------
enabled_languages := c

with_jit = yes

# FIXME: compiler bug
jit_no_cpus	:= ia64

ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(jit_no_cpus)))
  with_jit := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
ifneq (,$(with_rtlibs))
  with_jit := disabled for rtlibs stage
endif
with_jit := $(call envfilt, jit, , , $(with_jit))

ifeq (,$(findstring gcc-,$(PKGSOURCE)))
  with_jit :=
endif

ifneq (,$(findstring build-cross, $(build_type)))
  with_jit := disabled for cross builds
endif

with_cc1 := yes
with_cc1 := $(call envfilt, cc1, , , $(with_cc1))
ifeq ($(with_cc1),yes)
  ifneq ($(DEB_CROSS),yes)
    with_libcc1 := yes
  endif
endif
ifneq (,$(with_rtlibs))
  with_libcc1 := disabled for rtlibs stage
endif

# Build all packages needed for C development
ifneq ($(with_base_only),yes)
  ifeq ($(with_dev),yes)
    with_cdev := yes
  endif
endif

ifeq (,$(filter $(DEB_STAGE),stage1 stage2))
# Ada --------------------
ada_no_cpus	:= m32r sh3 sh3eb sh4 sh4eb
# no Debian builds ... some of these should exist
ada_no_cpus += m68k powerpcspe sparc64
ada_no_cpus += x32 # see https://gcc.gnu.org/PR61954
ifneq (,$(filter $(distrelease),trusty))
  ada_no_cpus += arm64
endif
# FUCKED UP:
# this disables build dependnecies for illumos-amd64,
# but this is used to be GNU triplet.
# Thank you. Fuck you.
ada_no_systems	:= illumos-amd64

ada_no_cross	:= no
ada_no_snap	:= no
ifeq ($(single_package),yes)
  ada_no_cpus += m68k powerpcspe sh4 sparc64
  ada_no_cpus += alpha
  ifneq (,$(filter $(DEB_TARGET_ARCH),m68k mips mipsel powerpcspe sh4 sparc64 hurd-i386 kfreebsd-i386 kfreebsd-amd64))
    ada_no_cpus += mips mipsel
    ada_no_cpus += hurd-i386 kfreebsd-i386 kfreebsd-amd64
    ada_no_snap := yes
  endif
endif

ifeq ($(with_dev),yes)
  ifneq ($(separate_lang),yes)
    with_ada := yes
  endif
endif
ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(ada_no_cpus)))
  with_ada := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
ifneq (,$(filter $(DEB_TARGET_ARCH),x32))
  with_ada := disabled for architecture $(DEB_TARGET_ARCH)
endif
ifneq (,$(findstring $(DEB_TARGET_GNU_SYSTEM),$(ada_no_systems)))
  with_ada := disabled for system $(DEB_TARGET_GNU_SYSTEM)
endif
ifeq ($(ada_no_cross)-$(DEB_CROSS),yes-yes)
  with_ada := disabled for cross compiler package
endif
ifeq ($(ada_no_snap)-$(single_package),yes-yes)
  with_ada := disabled for snapshot build
endif
ifneq (,$(findstring gccgo,$(PKGSOURCE)))
  with_ada :=
endif
ifneq (,$(filter $(distrelease),lucid))
  with_ada :=
endif
ifeq ($(DEB_BUILD_ARCH),illumos-amd64)
  with_ada := no gnat on Dyson yet
endif
with_ada := $(call envfilt, ada, , , $(with_ada))


ifeq ($(DEB_STAGE)-$(filter libgnat, $(with_rtlibs)),rtlibs-)
  with_ada := disabled for rtlibs stage
endif

#ifneq ($(single_package),yes)
#  with_separate_gnat := yes
#endif

ifneq ($(with_separate_gnat),yes)
  ifeq ($(with_ada),yes)
    ifneq (,$(filter $(distrelease),squeeze lucid))
      with_ada :=
    endif
  endif
endif

ifeq ($(with_ada)-$(with_separate_gnat),yes-yes)
  ifneq (,$(findstring gnat,$(PKGSOURCE)))
    languages := c
    separate_lang := yes
    with_mudflap := no
    with_gccbase := no
    with_cdev := no
    with_cc1 := no
    with_libcc1 := no
  else
    debian_extra_langs += ada
    with_ada := built from separate source
    with_libgnat := built from separate source
  endif
endif

ifeq ($(with_ada),yes)
  enabled_languages += ada
  with_libgnat := yes
  with_gnatsjlj := yes
endif

# C++ -------------------------
cxx_no_cpus := avr
ifneq ($(with_base_only),yes)
  ifneq ($(separate_lang),yes)
    with_cxx := yes
  endif
endif
ifneq (,$(findstring $(DEB_TARGET_ARCH_CPU),$(cxx_no_cpus)))
  with_cxx := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
with_cxx := $(call envfilt, c++, obj-c++ java, , $(with_cxx))

# Set the default libstdc++ ABI. libstdc++ provides both ABI's.
# Existing code still runs with the new c++11 ABI, however link
# errors are seen when one object is compiled with the new std::string in scope,
# another object is compiled with the old std::string in scope. both can link
# to libstdc++.so but not to each other.
# two objects (which might be some system library and a user's program) need to
# agree on the version of std::string they're using

libstdcxx_abi = new
# backports default to the old ABI
ifneq (,$(filter $(distrelease),squeeze wheezy jessie lucid precise trusty utopic vivid))
  libstdcxx_abi = gcc4-compatible
endif

# Build all packages needed for C++ development
ifeq ($(with_cxx),yes)
  ifeq ($(with_dev),yes)
    with_cxxdev := yes
    with_libcxxdbg := yes
  endif
  ifeq ($(with_common_libs),yes)
    with_libcxx := yes
  endif

  # debugging versions of libstdc++
  ifneq (,$(findstring gcc-, $(PKGSOURCE)))
  ifeq ($(with_cxxdev),yes)
    with_debug := yes
    debug_no_cpus :=
    ifneq (,$(findstring $(DEB_TARGET_ARCH_CPU),$(debug_no_cpus)))
      with_debug := disabled for cpu $(DEB_TARGET_GNU_CPU)
    endif
  endif
  endif
  with_debug := $(call envfilt, debug, , , $(with_debug))

  enabled_languages += c++
endif

# Java --------------------
# - To build a standalone gcj package (with no corresponding gcc
#   package): with_separate_libgcj=yes, with_standalone_gcj=yes
# - To build the java packages from the gcc source package:
#   with_separate_libgcj=no, with_standalone_gcj=no
# - To build gcc and java from separate sources:
#   with_separate_libgcj=yes, with_standalone_gcj=no

java_no_cpus := # arm64 mips mipsel
java_no_systems :=

ifneq ($(single_package),yes)
  with_separate_libgcj := yes
endif
with_separate_libgcj := no
with_standalone_gcj := no

ifneq ($(separate_lang),yes)
  with_java := yes
endif

# java converted for V3 C++ ABI for some archs
ifeq ($(with_base_only),yes)
  with_java := no
endif
ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(java_no_cpus)))
  with_java := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
ifneq (,$(filter $(DEB_TARGET_GNU_SYSTEM),$(java_no_systems)))
  with_java := disabled for system $(DEB_TARGET_GNU_SYSTEM)
endif
ifeq ($(java_no_cross)-$(DEB_CROSS),yes-yes)
  with_java := disabled for cross compiler package
endif
with_java := $(call envfilt, java, , c++, $(with_java))

ifeq ($(DEB_STAGE)-$(filter libgcj, $(with_rtlibs)),rtlibs-)
  with_java := disabled for rtlibs stage
endif

ifneq (,$(findstring gccgo, $(PKGSOURCE)))
  with_java :=
endif

ifeq ($(with_java)-$(with_separate_libgcj),yes-yes)
  ifneq (,$(findstring gcj, $(PKGSOURCE)))
    languages := c c++
    separate_lang := yes
  else
    debian_extra_langs += java
    with_java := built from separate source
    with_gcj := built from separate source
    with_libgcj := buit from separate source
  endif
endif

with_java_plugin := no

ifeq ($(with_java),yes)
  # use the same names as OpenJDK
  java_cpu_map = armel=arm armhf=arm hppa=parisc i686=i386 i586=i386 i486=i386 mipsel=mips mips64=mips mips64el=mips mipsn32=mips mipsn32el=mips powerpc=ppc ppc64el=ppc64 sh4=sh x32=x32
  java_cpu = $(patsubst $(DEB_TARGET_ARCH_CPU)=%,%, \
                         $(filter $(DEB_TARGET_ARCH_CPU)=%,$(java_cpu_map)))
  ifeq (,$(java_cpu))
    java_cpu = $(DEB_TARGET_ARCH_CPU)
  endif
  java_priority = 10$(subst .,,$(BASE_VERSION))

  with_libgcj := yes
  with_libgcjbc := no

  ifneq (,$(findstring gcj-4,$(PKGSOURCE)))
    ifneq (,$(filter $(DEB_TARGET_ARCH), arm))
      with_gcj_base_only := yes
    endif
  endif

  ifeq ($(single_package),yes)
    with_ecj := yes
  endif

  #ifneq (,$(filter $(DEB_TARGET_ARCH),hppa))
  #  with_native_ecj := yes
  #endif

  with_java_maintainer_mode := no

  # used as well in debian/rules.conf to determine the build deps
  java_awt_peers = gtk # qt # xlib

  ifeq ($(with_common_libs),yes)
    with_libgcj_doc := yes
  endif

  # Build all packages needed for Java development (gcj, libgcj-dev)
  ifeq ($(with_dev),yes)
    with_javadev := yes
    with_gcj := yes
  endif

  with_java_alsa := yes
  ifeq (,$(filter $(DEB_TARGET_GNU_SYSTEM),linux-gnu))
    with_java_alsa := no
  endif

  # Just build the cross compiler to be able to cross build a native build.
  ifeq ($(DEB_CROSS),yes)
    with_libgcj :=
  endif

  enabled_languages += java
endif

# Go -------------------
# - To build a standalone gccgo package (with no corresponding gcc
#   package): with_separate_libgo=yes, with_standalone_go=yes
# - To build the go packages from the gcc source package:
#   with_separate_libgo=no, with_standalone_go=no
# - To build gcc and go from separate sources:
#   with_separate_libgo=yes, with_standalone_go=no

go_no_cross := yes
go_no_cross := no

ifneq (,$(findstring gccgo, $(PKGSOURCE)))
  with_separate_libgo := yes
  with_standalone_go := yes
endif

go_no_cpus := avr arm hppa m68k sh4 sparc sparc64
ifeq (,$(filter $(distrelease),lenny etch squeeze dapper hardy jaunty karmic lucid maverick natty oneiric))
  go_no_cpus := $(filter-out arm, $(go_no_cpus))
endif
go_no_systems := gnu kfreebsd-gnu

ifneq ($(with_base_only),yes)
  ifneq ($(separate_lang),yes)
    with_go := yes
  endif
endif
ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(go_no_cpus)))
  with_go := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
ifneq (,$(findstring $(DEB_TARGET_GNU_SYSTEM),$(go_no_systems)))
  with_go := disabled for system $(DEB_TARGET_GNU_SYSTEM)
endif
ifeq ($(go_no_cross)-$(DEB_CROSS),yes-yes)
  with_go := disabled for cross compiler package
endif
ifeq ($(DEB_STAGE)-$(filter libgo, $(with_rtlibs)),rtlibs-)
  with_go := disabled for rtlibs stage
endif
with_go := $(call envfilt, go, , , $(with_go))

# Build all packages needed for Go development
ifneq (,$(findstring gcc, $(PKGSOURCE)))
  ifeq ($(with_go),yes)
    ifeq ($(with_common_libs),yes)
      with_libgo := yes
    endif
    enabled_languages += go
  endif
endif

ifeq ($(with_go)-$(with_separate_libgo),yes-yes)
  ifneq (,$(findstring gccgo, $(PKGSOURCE)))
    languages := c c++ go
    separate_lang := yes
    with_libgcc := yes
    with_shared_libgcc := yes
  else
    debian_extra_langs += go
    with_go := built from separate source
    with_libgo := buit from separate source
  endif
endif

# D ---------------------------
d_no_cross := yes
d_no_snap := yes
d_no_cpus := s390 sh4

ifneq ($(single_package),yes)
  with_separate_gdc := yes
endif
with_separate_gdc := no

ifneq ($(separate_lang),yes)
  with_d := yes
endif

ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(d_no_cpus)))
  with_d := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
ifeq ($(d_no_snap)-$(single_package),yes-yes)
  with_d := disabled for snapshot build
endif
ifeq ($(DEB_STAGE)-$(filter libphobos, $(with_rtlibs)),rtlibs-)
  with_d := disabled for rtlibs stage
endif
with_d := $(call envfilt, d, , , $(with_d))

ifeq ($(with_base_only),yes)
  with_d := no
endif

ifeq ($(DEB_HOST_ARCH),illumos-amd64)
  with_d := no
endif

ifeq ($(with_d)-$(with_separate_gdc),yes-yes)
  ifneq (,$(findstring gdc,$(PKGSOURCE)))
    languages := c c++
    separate_lang := yes

    # FIXME: language selection needs improvement.
    with_go := disabled for d
  else
    debian_extra_langs += d
    with_d := built from separate source
  endif
endif

ifeq ($(with_d),yes)
  libphobos_archs = amd64 armel armhf i386 x32 kfreebsd-amd64 kfreebsd-i386
  ifneq (,$(filter $(DEB_TARGET_ARCH), $(libphobos_archs)))
    with_libphobos := yes
  endif

  libphobos_no_cpus := alpha avr arm64 hppa ia64 m68k \
	mips mipsel mips64 mips64el mipsn32 mipsn32el \
	powerpc powerpcspe ppc64 s390 s390x sh4 sparc sparc64
  libphobos_no_systems := gnu kfreebsd-gnu
  ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(libphobos_no_cpus)))
    with_libphobos := disabled for cpu $(DEB_TARGET_ARCH_CPU)
  endif
  ifneq (,$(filter $(DEB_TARGET_GNU_SYSTEM),$(libphobos_no_systems)))
    with_libphobos := disabled for system $(DEB_TARGET_GNU_SYSTEM)
  endif

  enabled_languages += d
endif

# Fortran 95 -------------------
fortran_no_cross := yes
fortran_no_cross := no

ifneq ($(with_base_only),yes)
  ifneq ($(separate_lang),yes)
    with_fortran := yes
  endif
endif
ifeq ($(fortran_no_cross)-$(DEB_CROSS),yes-yes)
  with_fortran := disabled for cross compiler package
endif
ifeq ($(DEB_STAGE)-$(filter libgfortran libquadmath, $(with_rtlibs)),rtlibs-)
  with_fortran := disabled for rtlibs stage
endif

with_fortran := $(call envfilt, fortran, , , $(with_fortran))

# Build all packages needed for Fortran development
ifeq ($(with_fortran),yes)
  ifeq ($(with_dev),yes)
    ifneq ($(DEB_STAGE)-$(filter libgfortran libquadmath, $(with_rtlibs)),rtlibs-)
      with_fdev := yes
    endif
  endif
  ifeq ($(with_common_libs),yes)
    with_libgfortran := yes
  endif
  enabled_languages += fortran
endif

# libquadmath -------------------

ifneq (,$(findstring $(DEB_TARGET_ARCH_CPU), ia64 i386 i486 i586 i686 amd64))
  # FIXME: upstream build tied to gfortran build
  ifeq ($(with_fortran),yes)
    with_qmath := yes
    ifneq (,$(findstring gcc-5,$(PKGSOURCE)))
      ifeq ($(with_common_libs),yes)
        with_libqmath := yes
      endif
    endif
  endif
endif

# ObjC ------------------------
objc_no_cross := no

ifneq ($(with_base_only),yes)
  ifneq ($(separate_lang),yes)
    with_objc := yes
    objc_no_archs =
    ifneq (,$(filter $(DEB_TARGET_ARCH),$(objc_no_archs)))
      with_objc :=
    endif
  endif
endif
ifeq ($(objc_no_cross)-$(DEB_CROSS),yes-yes)
  with_objc := disabled for cross compiler package
endif
ifeq ($(DEB_STAGE)-$(filter libobjc, $(with_rtlibs)),rtlibs-)
  with_objc := disabled for rtlibs stage
endif
with_objc := $(call envfilt, objc, obj-c++, , $(with_objc))

ifeq ($(with_objc),yes)
  # the ObjC runtime with garbage collection enabled needs the Boehm GC
  with_objc_gc := yes

  # disable ObjC garbage collection library (needs libgc)
  libgc_no_cpus := arm64 avr mips mipsel # alpha amd64 arm armel armhf hppa i386 ia64 m68k mips mipsel powerpc ppc64 s390 s390x sparc
  libgc_no_systems := knetbsd-gnu
  ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(libgc_no_cpus)))
    with_objc_gc := disabled for cpu $(DEB_TARGET_ARCH_CPU)
  endif
  ifneq (,$(findstring $(DEB_TARGET_GNU_SYSTEM),$(libgc_no_systems)))
    with_objc_gc := disabled for system $(DEB_TARGET_GNU_SYSTEM)
  endif

  # Build all packages needed for Objective-C development
  ifeq ($(with_dev),yes)
    with_objcdev := yes
  endif
  ifeq ($(with_common_libs),yes)
    with_libobjc := yes
  endif

  enabled_languages += objc
endif

# ObjC++ ----------------------
objcxx_no_cross := no

ifeq ($(with_objc),yes)
  ifneq ($(with_base_only),yes)
    ifneq ($(separate_lang),yes)
      with_objcxx := yes
    endif
  endif
endif
ifeq ($(objcxx_no_cross)-$(DEB_CROSS),yes-yes)
  with_objcxx := disabled for cross compiler package
endif
with_objcxx := $(call envfilt, obj-c++, , c++ objc, $(with_objcxx))

ifeq ($(with_objcxx),yes)
  enabled_languages += obj-c++
endif

# -------------------------------------------------------------------
# other config

# not built from the main source package
ifeq (,$(findstring gcc-,$(PKGSOURCE)))
  extra_package := yes
endif

with_nls := yes
ifeq ($(trunk_build),yes)
  with_nls := no
endif
with_nls := $(call envfilt, nls, , , $(with_nls))

# powerpc nof libraries -----
with_libnof := no

ifneq (,$(findstring gcc-5,$(PKGSOURCE)))
  ifeq (,$(with_rtlibs))
    with_source := yes
  endif
endif
with_source := $(call envfilt, source, , , $(with_source))

ifeq ($(with_cdev),yes)

# ssp & libssp -------------------------
with_ssp := yes
ssp_no_archs = alpha hppa ia64 m68k
ifneq (, $(filter $(DEB_TARGET_ARCH),$(ssp_no_archs) $(ssp_no_archs:%=uclibc-%)))
  with_ssp := not available on $(DEB_TARGET_ARCH)
endif
with_ssp := $(call envfilt, ssp, , , $(with_ssp))

ifeq ($(with_ssp),yes)
  ifneq ($(derivative),Debian)
    ifneq (,$(findstring gcc-5, $(PKGSOURCE)))
      with_ssp_default := yes
    endif
  endif
endif

# gomp --------------------
with_gomp := yes
with_gomp := $(call envfilt, gomp, , , $(with_gomp))
gomp_no_archs =
ifneq (,$(filter $(DEB_TARGET_ARCH),$(gomp_no_archs)))
  with_gomp :=
endif

# itm --------------------
itm_archs = amd64 arm64 i386 x32 ppc64 ppc64el
ifneq (,$(filter $(DEB_TARGET_ARCH),$(itm_archs)))
  with_itm := yes
endif
with_itm := $(call envfilt, itm, , , $(with_itm))

# atomic --------------------
with_atomic := yes
atomic_no_archs =
ifneq (,$(filter $(DEB_TARGET_ARCH),$(atomic_no_archs)))
  with_atomic :=
endif

# backtrace --------------------
with_backtrace := yes
backtrace_no_archs = m68k
ifneq (,$(filter $(DEB_TARGET_ARCH),$(backtrace_no_archs)))
  with_backtrace :=
endif

# asan / sanitizer --------------------
with_asan :=
with_asan := $(call envfilt, asan, , , $(with_asan))
asan_archs = amd64 armel armhf arm64 i386 powerpc ppc64 ppc64el x32 sparc sparc64
ifneq (,$(filter $(DEB_TARGET_ARCH),$(asan_archs)))
  with_asan := yes
endif

# lsan / sanitizer --------------------
with_lsan :=
with_lsan := $(call envfilt, lsan, , , $(with_lsan))
lsan_archs = amd64
ifneq (,$(filter $(DEB_TARGET_ARCH),$(lsan_archs)))
  with_lsan := yes
endif

# tsan / sanitizer --------------------
with_tsan :=
with_tsan := $(call envfilt, tsan, , , $(with_tsan))
tsan_archs = amd64
ifneq (,$(filter $(DEB_TARGET_ARCH),$(tsan_archs)))
  with_tsan := yes
endif

endif # with_cdev

# ubsan / sanitizer --------------------
with_ubsan :=
with_ubsan := $(call envfilt, ubsan, , , $(with_ubsan))
ubsan_archs = amd64 armel armhf arm64 i386 powerpc ppc64 ppc64el x32 sparc sparc64
ifneq (,$(filter $(DEB_TARGET_ARCH),$(ubsan_archs)))
  with_ubsan := yes
endif

# libvtv --------------------
with_vtv :=
with_vtv := $(call envfilt, vtv, , , $(with_vtv))
vtv_archs = amd64 i386 x32
ifneq (,$(filter $(DEB_TARGET_ARCH),$(vtv_archs)))
  with_vtv := yes
  with_libvtv := yes
endif
# libvtv builds a modified libstdc++, don't enable it by default
with_vtv :=
with_libvtv :=

# libcilkrts --------------------
with_cilkrts :=
with_cilkrts := $(call envfilt, cilkrts, , , $(with_cilkrts))
cilkrts_archs = amd64 i386 x32
ifneq (,$(filter $(DEB_TARGET_ARCH),$(cilkrts_archs)))
  with_cilkrts := yes
endif

# libmpx --------------------
with_mpx :=
with_mpx := $(call envfilt, mpx, , , $(with_mpx))
mpx_archs = amd64 i386
ifneq (,$(filter $(DEB_TARGET_ARCH),$(mpx_archs)))
  # requires newer binutils, or else libmpxwrappers isn't built
  ifeq (,$(filter $(distrelease),squeeze lucid precise))
    with_mpx := yes
    ifneq (,$(findstring gcc-, $(PKGSOURCE)))
      with_libmpx := yes
    endif
  endif
endif

# gold --------------------
# armel with binutils 2.20.51 only
gold_archs = amd64 armel armhf i386 powerpc powerpcspe ppc64 ppc64el sparc sparc64 x32 hurd-i386
ifneq (,$(filter $(DEB_TARGET_ARCH),$(gold_archs)))
  with_gold := yes
endif

# plugins --------------------
with_plugins := yes
ifneq (,$(with_rtlibs))
  with_plugins := disabled for rtlibs stage
endif

endif # ifeq (,$(filter $(DEB_STAGE),stage1 stage2))

# Don't include docs with GFDL invariant sections
GFDL_INVARIANT_FREE := yes
ifeq ($(derivative),Ubuntu)
  GFDL_INVARIANT_FREE := no
endif
ifeq ($(DEB_TARGET_ARCH_OS),illumos)
  GFDL_INVARIANT_FREE := no
endif

# -------------------------------------------------------------------
# non-extra config
ifeq ($(extra_package),yes)
  ifeq ($(with_separate_libgcj)-$(with_standalone_gcj),yes-no)
    # package stuff
    with_gccbase := no
    with_cdev := no
    with_cxx := no
    with_cxxdev := no

    ifneq ($(DEB_CROSS),yes)
      with_gcjbase := yes
    else
      with_gcjxbase := yes
    endif
  endif
  ifeq ($(with_separate_libgo),yes)
    # package stuff
    with_gccbase := yes
    with_cdev := no
    with_cxx := no
    with_cxxdev := no
  endif
else
  # libssp ------------------
  ifeq ($(with_ssp)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libssp := $(if $(wildcard $(builddir)/gcc/auto-host.h),$(shell if grep -qs '^\#define TARGET_LIBC_PROVIDES_SSP 1' $(builddir)/gcc/auto-host.h; then printf 'libc provides ssp'; else printf 'yes'; fi))
    #endif
  endif

  # libgomp -----------------
  ifeq ($(with_gomp)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libgomp := yes
    #endif
  endif

  # libitm -----------------
  ifeq ($(with_itm)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libitm := yes
    #endif
  endif

  # libatomic -----------------
  ifeq ($(with_atomic)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libatomic := yes
    #endif
  endif

  # libbacktrace -----------------
  ifeq ($(with_backtrace)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      # currently not a shared library
      #with_libbacktrace := yes
    #endif
  endif

  # libasan -----------------
  # asan changes soname in GCC 5
  #ifeq ($(with_asan)-$(with_common_libs),yes-yes)
  ifeq ($(with_asan),yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libasan := yes
    #endif
  endif

  # liblsan -----------------
  ifeq ($(with_lsan)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_liblsan := yes
    #endif
  endif

  # libtsan -----------------
  ifeq ($(with_tsan)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libtsan := yes
    #endif
  endif

  # libubsan -----------------
  ifeq ($(with_ubsan)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libubsan := yes
    #endif
  endif

  # libvtv -----------------
  ifeq ($(with_vtv)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libvtv := yes
    #endif
  endif

  # libcilkrts -----------------
  ifeq ($(with_cilkrts)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libcilkrts := yes
    #endif
  endif

  # libquadmath -----------------
  ifeq ($(with_qmath)-$(with_common_libs),yes-yes)
    #ifneq ($(DEB_CROSS),yes)
      with_libqmath := yes
    #endif
  endif

  # fixincludes -------
  ifneq ($(DEB_CROSS),yes)
    ifeq ($(with_common_pkgs),yes)
      with_fixincl	:= yes
    endif
  endif

  # Shared libgcc --------------------
  ifneq ($(DEB_STAGE),stage1)
    with_shared_libgcc := yes
    ifeq ($(with_common_libs),yes)
      with_libgcc := yes
    endif
  endif

  # libgcc-math --------------------
  with_libgmath := no
  ifneq (,$(findstring i486,$(DEB_TARGET_ARCH)))
    #with_libgccmath := yes
    #with_lib64gmath := yes
    #with_libgmathdev := yes
  endif
  ifeq ($(DEB_TARGET_ARCH),amd64)
    #with_libgccmath := yes
    #with_lib32gmath := yes
    #with_libgmathdev := yes
  endif

  # hppa64 build ----------------
  hppa64_no_snap := no
  ifeq ($(DEB_TARGET_ARCH),hppa)
    with_hppa64 := yes
  endif
  ifeq ($(hppa64_no_snap)-$(trunk_build),yes-yes)
    with_hppa64 := disabled for snapshot build
  endif
  with_hppa64 := $(call envfilt, hppa64, , , $(with_hppa64))

  ifeq ($(DEB_STAGE),rtlibs)
    with_libatomic := disabled for rtlibs stage
    with_libasan := disabled for rtlibs stage
    with_liblsan := disabled for rtlibs stage
    with_libtsan := disabled for rtlibs stage
    with_libubsan := disabled for rtlibs stage
    with_libcilkrts := disabled for rtlibs stage
    with_fixincl := disabled for rtlibs stage
    with_hppa64 := disabled for rtlibs stage
  endif

  # neon build -------------------
  # FIXME: build as a cross compiler to build on armv4 as well
  ifneq (,$(findstring gcc-5, $(PKGSOURCE)))
    ifeq ($(derivative),Ubuntu)
#      neon_archs = armel armhf
#      ifneq (, $(filter $(DEB_TARGET_ARCH),$(neon_archs)))
#        with_neon = yes
#      endif
    endif
  endif
endif

# run testsuite ---------------
with_check := yes
# if you don't want to run the gcc testsuite, uncomment the next line
#with_check := disabled by hand
ifeq ($(with_base_only),yes)
  with_check := no
endif
ifeq ($(DEB_CROSS),yes)
  with_check := disabled for cross compiler package
endif
ifneq (,$(findstring cross-build-,$(build_type)))
  with_check := disabled for cross building the compiler
endif
ifneq (,$(with_rtlibs))
  with_check := disabled for rtlibs stage
endif
check_no_cpus := m68k
check_no_systems := # gnu kfreebsd-gnu
ifneq (,$(filter $(DEB_TARGET_ARCH_CPU),$(check_no_cpus)))
  with_check := disabled for cpu $(DEB_TARGET_ARCH_CPU)
endif
ifneq (,$(findstring $(DEB_TARGET_GNU_SYSTEM),$(check_no_systems)))
  with_check := disabled for system $(DEB_TARGET_GNU_SYSTEM)
endif
ifeq ($(derivative)-$(DEB_HOST_ARCH),Ubuntu-hppa)
  ifneq ($(single_package),yes)
    with_check := disabled, testsuite timeouts with expect
  endif
endif
ifneq (,$(findstring gdc,$(PKGSOURCE)))
  with_check := disabled for D
endif
with_check := $(call envfilt, check, , , $(with_check))
ifdef WITHOUT_CHECK
  with_check := disabled by environment
endif
ifneq ($(findstring nocheck, $(DEB_BUILD_OPTIONS)),)
  with_check := disabled by DEB_BUILD_OPTIONS
endif
ifneq (,$(filter $(DEB_HOST_ARCH), hppa mips))
  ifneq ($(single_package),yes)
    with_check := disabled for $(DEB_HOST_ARCH), testsuite timeouts with expect
  endif
endif
#with_check := disabled for this upload

# not a dependency on all archs, but if available, use it for the testsuite
ifneq (,$(wildcard /usr/bin/localedef))
  locale_data = generate
endif

all_enabled_languages := $(enabled_languages)
languages_without_lang_opt := c++ objc obj-c++

debian_extra_langs := $(subst obj-c++,objcp,$(debian_extra_langs))
export debian_extra_langs

# multilib
biarch_map := i686=x86_64 powerpc=powerpc64 sparc=sparc64 sparc64=sparc s390=s390x s390x=s390 \
		x86_64=i686 powerpc64=powerpc mips=mips64 mipsel=mips64el \
		mips64=mips mips64el=mipsel mipsn32=mips mipsn32el=mipsel
ifneq (,$(filter $(derivative),Ubuntu))
  ifeq (,$(filter $(distrelease),dapper hardy jaunty karmic lucid))
    biarch_map := $(subst i686=,i486=,$(biarch_map))
  endif
else # Debian
  biarch_map := $(subst i686=,i486=,$(biarch_map))
endif

ifeq ($(derivative),Ubuntu)
  ifeq (,$(filter $(distrelease),dapper hardy jaunty karmic lucid maverick natty))
    biarch_map += arm=arm
  endif
endif
biarch_cpu := $(strip $(patsubst $(DEB_TARGET_GNU_CPU)=%,%, \
			 $(filter $(DEB_TARGET_GNU_CPU)=%,$(biarch_map))))

biarch64 := no
biarch32 := no
biarchn32 := no
biarchx32 := no
biarchhf := no
biarchsf := no
flavours :=
define gen_biarch
  ifneq (yes,$$(call envfilt, biarch, , ,yes))
    biarch$1archs :=
  endif
  ifneq (,$$(findstring /$$(DEB_TARGET_ARCH)/,$$(biarch$1archs)))
    biarch$1 := yes
    flavours += $1
    #biarch$1subdir = $$(biarch_cpu)-$$(DEB_TARGET_GNU_SYSTEM)
    biarch$1subdir = $1
    ifeq ($$(with_libgcc),yes)
      with_lib$1gcc := yes
    endif
    ifeq ($$(with_cdev),yes)
      with_lib$1gccdev := yes
    endif
    ifeq ($$(with_libcxx),yes)
      with_lib$1cxx := yes
    endif
    ifeq ($$(with_libcxxdbg),yes)
      with_lib$1cxxdbg := yes
    endif
    ifeq ($$(with_cxxdev),yes)
      with_lib$1cxxdev := yes
    endif
    ifeq ($$(with_libobjc),yes)
      with_lib$1objc := yes
    endif
    ifeq ($$(with_objcdev),yes)
      with_lib$1objcdev := yes
    endif
    ifeq ($$(with_libgfortran),yes)
      with_lib$1gfortran := yes
    endif
    ifeq ($$(with_fdev),yes)
      with_lib$1gfortrandev := yes
    endif
    ifeq ($$(with_libphobos),yes)
      ifeq (,$(filter $1, hf))
        with_lib$1phobosdev := yes
      endif
    endif
    ifeq ($$(with_libssp),yes)
      with_lib$1ssp := yes
    endif
    ifeq ($$(with_libgomp),yes)
      with_lib$1gomp:= yes
    endif
    ifeq ($$(with_libitm),yes)
      with_lib$1itm:= yes
    endif
    ifeq ($$(with_libatomic),yes)
      with_lib$1atomic:= yes
    endif
    ifeq ($$(with_libbacktrace),yes)
      with_lib$1backtrace:= yes
    endif
    ifeq ($$(with_libasan),yes)
      with_lib$1asan:= yes
    endif
    ifeq ($$(with_liblsan),yes)
      with_lib$1lsan := yes
    endif
    ifeq ($$(with_libtsan),yes)
      with_lib$1tsan:= yes
    endif
    ifeq ($$(with_libubsan),yes)
      with_lib$1ubsan := yes
    endif
    ifeq ($$(with_libvtv),yes)
      with_lib$1vtv := yes
    endif
    ifeq ($$(with_libcilkrts),yes)
      with_lib$1cilkrts := yes
    endif
    ifeq ($$(with_libmpx),yes)
      ifneq (,$(filter $1, 32 64))
        with_lib$1mpx := yes
      endif
    endif
    ifeq ($$(with_libqmath),yes)
      with_lib$1qmath := yes
    endif
    ifeq ($$(with_libgo),yes)
      with_lib$1go := yes
    endif

    biarch_multidir_names = libiberty libgcc libbacktrace libatomic libgomp
    ifneq (,$$(findstring gcc-, $$(PKGSOURCE)))
      biarch_multidir_names += libstdc++-v3 libobjc libgfortran libssp \
				zlib libitm libmpx \
				libsanitizer \
				libcilkrts libvtv
      ifeq ($$(with_objc_gc),yes)
        biarch_multidir_names += boehm-gc
      endif
    endif
    ifneq (,$(findstring yes, $(with_java) $(with_go)))
      biarch_multidir_names += libffi
    endif
    ifeq ($(with_fortran),yes)
      biarch_multidir_names += libquadmath
    endif
    ifeq ($(with_go),yes)
      biarch_multidir_names += libgo
    endif
    ifeq ($(with_libphobos),yes)
      ifeq (,$(filter $1, hf))
        biarch_multidir_names += libphobos
      endif
    endif
    export biarch_multidir_names
    ifneq (,$$(findstring 32,$1))
      TARGET64_MACHINE := $$(strip $$(subst $$(DEB_TARGET_GNU_CPU),$$(biarch_cpu), \
				$$(TARGET_ALIAS)))
      TARGET32_MACHINE := $$(TARGET_ALIAS)
    else
      TARGET64_MACHINE := $$(TARGET_ALIAS)
      TARGET64_MACHINE := $$(strip $$(subst $$(DEB_TARGET_GNU_CPU),$$(biarch_cpu), \
				$$(TARGET_ALIAS)))
    endif
    export TARGET32_MACHINE
    export TARGET64_MACHINE
  endif
endef
biarch32archs := /amd64/ppc64/kfreebsd-amd64/s390x/sparc64/x32/mipsn32/mipsn32el/mips64/mips64el/illumos-amd64/
biarch64archs := /i386/powerpc/sparc/s390/mips/mipsel/mipsn32/mipsn32el/x32/
biarchn32archs := /mips/mipsel/mips64/mips64el/
ifeq ($(derivative),Ubuntu)
  ifeq (,$(filter $(distrelease),dapper hardy jaunty karmic lucid maverick natty))
    biarchhfarchs := /armel/
    biarchsfarchs := /armhf/
  endif
  ifeq (,$(filter $(distrelease),dapper hardy jaunty karmic lucid maverick natty oneiric precise quantal))
    biarchx32archs := /amd64/i386/
  endif
endif
ifeq ($(derivative),Debian)
  ifeq (,$(filter $(distrelease),etch squeeze wheezy))
    biarchx32archs := /amd64/i386/
  endif
endif
$(foreach x,32 64 n32 x32 hf sf,$(eval $(call gen_biarch,$(x))))

#ifeq ($(DEB_TARGET_ARCH),ia64)
#  biarch32 := yes
#endif

#ifeq ($(trunk_build),yes)
#  no_biarch_libs := yes
#endif
no_biarch_libs :=

ifeq ($(no_biarch_libs),yes)
  with_lib64gcc		:= no
  with_lib64cxx		:= no
  with_lib64cxxdbg	:= no
  with_lib64objc	:= no
  with_lib64ffi		:= no
  with_lib64gcj		:= no
  with_lib64gfortran	:= no
  with_lib64ssp		:= no
  with_lib64go		:= no
  with_lib64gomp	:= no
  with_lib64itm		:= no
  with_lib64qmath	:= no
  with_lib64atomic	:= no
  with_lib64backtrace	:= no
  with_lib64asan	:= no
  with_lib64lsan	:= no
  with_lib64tsan	:= no
  with_lib64ubsan	:= no
  with_lib64vtv		:= no
  with_lib64cilkrts	:= no
  with_lib64mpx		:= no
  with_lib64gccdev	:= no
  with_lib64cxxdev	:= no
  with_lib64objcdev	:= no
  with_lib64gfortrandev	:= no
  with_lib64phobosdev	:= no

  with_lib32gcc		:= no
  with_lib32cxx		:= no
  with_lib32cxxdbg	:= no
  with_lib32objc	:= no
  with_lib32ffi		:= no
  with_lib32gcj		:= no
  with_lib32gfortran	:= no
  with_lib32ssp		:= no
  with_lib32go		:= no
  with_lib32gomp	:= no
  with_lib32itm		:= no
  with_lib32qmath	:= no
  with_lib32atomic	:= no
  with_lib32backtrace	:= no
  with_lib32asan	:= no
  with_lib32lsan	:= no
  with_lib32tsan	:= no
  with_lib32ubsan	:= no
  with_lib32vtv		:= no
  with_lib32cilkrts	:= no
  with_lib32mpx		:= no
  with_lib32gccdev	:= no
  with_lib32cxxdev	:= no
  with_lib32objcdev	:= no
  with_lib32gfortrandev	:= no
  with_lib32phobosdev	:= no

  with_libn32gcc	:= no
  with_libn32cxx	:= no
  with_libn32cxxdbg	:= no
  with_libn32objc	:= no
  with_libn32ffi	:= no
  with_libn32gcj	:= no
  with_libn32gfortran	:= no
  with_libn32ssp	:= no
  with_libn32go		:= no
  with_libn32gomp	:= no
  with_libn32itm	:= no
  with_libn32qmath	:= no
  with_libn32atomic	:= no
  with_libn32backtrace	:= no
  with_libn32asan	:= no
  with_libn32lsan	:= no
  with_libn32tsan	:= no
  with_libn32ubsan	:= no
  with_libn32gccdev	:= no
  with_libn32cxxdev	:= no
  with_libn32objcdev	:= no
  with_libn32gfortrandev:= no
  with_libn32phobosdev	:= no

  with_libx32gcc	:= no
  with_libx32cxx	:= no
  with_libx32cxxdbg	:= no
  with_libx32objc	:= no
  with_libx32ffi	:= no
  with_libx32gcj	:= no
  with_libx32gfortran	:= no
  with_libx32ssp	:= no
  with_libx32go		:= no
  with_libx32gomp	:= no
  with_libx32itm	:= no
  with_libx32qmath	:= no
  with_libx32atomic	:= no
  with_libx32backtrace	:= no
  with_libx32asan	:= no
  with_libx32lsan	:= no
  with_libx32tsan	:= no
  with_libx32ubsan	:= no
  with_libx32vtv	:= no
  with_libx32cilkrts	:= no
  with_libx32gccdev	:= no
  with_libx32cxxdev	:= no
  with_libx32objcdev	:= no
  with_libx32gfortrandev:= no
  with_libx32phobosdev	:= no

  with_libhfgcc		:= no
  with_libhfcxx		:= no
  with_libhfcxxdbg	:= no
  with_libhfobjc	:= no
  with_libhfffi		:= no
  with_libhfgcj		:= no
  with_libhfgfortran	:= no
  with_libhfssp		:= no
  with_libhfgo		:= no
  with_libhfgomp	:= no
  with_libhfitm		:= no
  with_libhfqmath	:= no
  with_libhfatomic	:= no
  with_libhfbacktrace	:= no
  with_libhfasan	:= no
  with_libhflsan	:= no
  with_libhftsan	:= no
  with_libhfubsan	:= no
  with_libhfgccdev	:= no
  with_libhfcxxdev	:= no
  with_libhfobjcdev	:= no
  with_libhfgfortrandev	:= no
  with_libhfphobosdev	:= no

  with_libsfgcc		:= no
  with_libsfcxx		:= no
  with_libsfcxxdbg	:= no
  with_libsfobjc	:= no
  with_libsfffi		:= no
  with_libsfgcj		:= no
  with_libsfgfortran	:= no
  with_libsfssp		:= no
  with_libsfgo		:= no
  with_libsfgomp	:= no
  with_libsfitm		:= no
  with_libsfqmath	:= no
  with_libsfatomic	:= no
  with_libsfbacktrace	:= no
  with_libsfasan	:= no
  with_libsflsan	:= no
  with_libsftsan	:= no
  with_libsfubsan	:= no
  with_libsfgccdev	:= no
  with_libsfcxxdev	:= no
  with_libsfobjcdev	:= no
  with_libsfgfortrandev	:= no
  with_libsfphobosdev	:= no

  with_java_plugin := no

  ifeq ($(with_ada)-$(with_separate_gnat),yes-yes)
    biarchhf	:= disabled for Ada
    biarchsf	:= disabled for Ada
  endif

endif

ifneq (,$(filter yes,$(biarch32) $(biarch64) $(biarchn32) $(biarchx32) $(biarchhf) $(biarchsf)))
  multilib := yes
endif

multilib_archs = $(sort $(subst /, , $(biarch64archs) $(biarch32archs) $(biarchn32archs) $(biarchx32archs) $(biarchhfarchs) $(biarchsfarchs)))

biarchsubdirs := \
  $(if $(filter yes,$(biarch64)),$(biarch64subdir),) \
  $(if $(filter yes,$(biarch32)),$(biarch32subdir),) \
  $(if $(filter yes,$(biarchn32)),$(biarchn32subdir),) \
  $(if $(filter yes,$(biarchx32)),$(biarchx32subdir),) \
  $(if $(filter yes,$(biarchhf)),$(biarchhfsubdir),) \
  $(if $(filter yes,$(biarchsf)),$(biarchsfsubdir),)
biarchsubdirs := {$(strip $(shell echo $(biarchsubdirs) | tr " " ","))}

# GNU locales
force_gnu_locales := yes
locale_no_cpus :=
locale_no_systems :=
ifneq (,$(findstring $(DEB_TARGET_GNU_SYSTEM),$(locale_no_systems)))
  force_gnu_locales := disabled for system $(DEB_TARGET_GNU_SYSTEM)
endif

gcc_tarpath		:= $(firstword $(wildcard gcc-*.tar.* /usr/src/gcc-5/gcc-*.tar.*))
gcc_tarball		:= $(notdir $(gcc_tarpath))
gcc_srcdir		:= $(subst -dfsg,,$(patsubst %.tar.xz,%,$(patsubst %.tar.lzma,%,$(patsubst %.tar.gz,%,$(gcc_tarball:.tar.bz2=)))))

ifeq ($(with_d),yes)
  gdc_tarpath		:= $(firstword $(wildcard gdc-*.tar.* /usr/src/gcc-$(BASE_VERSION)/gdc-*.tar.*))
  gdc_tarball		:= $(notdir $(gdc_tarpath))
  gdc_srcdir		:= $(patsubst %.tar.xz,%,$(patsubst %.tar.lzma,%,$(patsubst %.tar.gz,%,$(gdc_tarball:.tar.bz2=))))
endif

# NOTE: This is not yet used. when building gcj, gdc or gnat using the
# gcc-source package, we don't require an exact binary dependency.
ifneq ($(dir $(gcc_tarpath)),./)
  built_using_external_source := yes
else
  built_using_external_source :=
endif
ifeq ($(DEB_CROSS),yes)
  add_built_using = yes
endif
ifeq ($(with_ada)-$(with_separate_gnat),yes-yes)
  add_built_using = yes
endif

ecj_jar := $(firstword $(wildcard ecj.jar /usr/share/java/eclipse-ecj.jar /usr/share/java/ecj.jar))

unpack_stamp		:= $(stampdir)/01-unpack-stamp
pre_patch_stamp		:= $(stampdir)/02-pre-patch-stamp
patch_stamp		:= $(stampdir)/02-patch-stamp
control_stamp		:= $(stampdir)/03-control-stamp
configure_stamp		:= $(stampdir)/04-configure-stamp
build_stamp		:= $(stampdir)/05-build-stamp
build_html_stamp	:= $(stampdir)/05-build-html-stamp
build_locale_stamp	:= $(stampdir)/05-build-locale-stamp
build_doxygen_stamp	:= $(stampdir)/05-build-doxygen-stamp
build_javasrc_stamp	:= $(stampdir)/05-build-javasrc-stamp
build_javadoc_stamp	:= $(stampdir)/05-build-javadoc-stamp
check_stamp		:= $(stampdir)/06-check-stamp
check_inst_stamp	:= $(stampdir)/06-check-inst-stamp
install_stamp		:= $(stampdir)/07-install-stamp
install_snap_stamp	:= $(stampdir)/07-install-snap-stamp
binary_stamp		:= $(stampdir)/08-binary-stamp

configure_dummy_stamp	:= $(stampdir)/04-configure-dummy-stamp
build_dummy_stamp	:= $(stampdir)/05-build-dummy-stamp
install_dummy_stamp	:= $(stampdir)/07-install-dummy-stamp

configure_jit_stamp	:= $(stampdir)/04-configure-jit-stamp
build_jit_stamp		:= $(stampdir)/05-build-jit-stamp
install_jit_stamp	:= $(stampdir)/07-install-jit-stamp

configure_hppa64_stamp	:= $(stampdir)/04-configure-hppa64-stamp
build_hppa64_stamp	:= $(stampdir)/05-build-hppa64-stamp
install_hppa64_stamp	:= $(stampdir)/07-install-hppa64-stamp

configure_neon_stamp	:= $(stampdir)/04-configure-neon-stamp
build_neon_stamp		:= $(stampdir)/05-build-neon-stamp
install_neon_stamp	:= $(stampdir)/07-install-neon-stamp

control_dependencies	:= $(patch_stamp)

ifeq ($(single_package),yes)
    configure_dependencies = $(configure_stamp)
    build_dependencies = $(build_stamp)
    install_dependencies = $(install_snap_stamp)
    ifeq ($(with_check),yes)
      check_dependencies += $(check_stamp)
    endif
else
  ifeq ($(with_base_only),yes)
    configure_dependencies = $(configure_dummy_stamp)
    build_dependencies = $(build_dummy_stamp)
    install_dependencies = $(install_dummy_stamp)
  else
    configure_dependencies = $(configure_stamp)
    build_dependencies = $(build_stamp)
    install_dependencies = $(install_stamp)
    ifeq ($(with_check),yes)
      check_dependencies += $(check_stamp)
    endif
  endif
endif

ifneq (,$(findstring gcj-, $(PKGSOURCE)))
  ifeq ($(with_gcj_base_only),yes)
    configure_dependencies = $(configure_dummy_stamp)
    build_dependencies = $(build_dummy_stamp)
    install_dependencies = $(install_dummy_stamp)
  endif
endif

ifeq ($(with_jit),yes)
  build_dependencies += $(build_jit_stamp)
  install_dependencies += $(install_jit_stamp)
endif

ifeq ($(with_neon),yes)
  build_dependencies += $(build_neon_stamp)
  install_dependencies += $(install_neon_stamp)
endif

ifeq ($(with_hppa64),yes)
  build_dependencies += $(build_hppa64_stamp)
  ifneq ($(trunk_build),yes)
    install_dependencies += $(install_hppa64_stamp)
  endif
endif

build_dependencies += $(check_dependencies)

stamp-dir:
	mkdir -p $(stampdir)

ifeq ($(DEB_CROSS),yes)
  define cross_mangle_shlibs
	if [ -f debian/$(1)/DEBIAN/shlibs ]; then \
	  sed -i s/$(cross_lib_arch)//g debian/$(1)/DEBIAN/shlibs; \
	fi
  endef
  define cross_mangle_substvars
	if [ -f debian/$(1).substvars ]; then \
	  sed -i 's/lib[^ ,(]*/&$(cross_lib_arch)/g' debian/$(1).substvars; \
	fi
  endef
else
  define cross_mangle_shlibs
  endef
  define cross_mangle_substvars
  endef
  # precise's dh_shlibdeps doesn't work well for ARM multilibs
  # and dh_shlibdeps doesn't work well for cross builds, see #698881.
  ifneq (,$(filter $(distrelease),precise quantal raring))
    ifneq (,$(filter $(DEB_TARGET_ARCH), armel armhf arm64))
      ignshld = -
    endif
  endif
endif
ifeq ($(DEB_STAGE),rtlibs)
  define cross_mangle_shlibs
  endef
  define cross_mangle_substvars
  endef
endif

# takes a *list* of package names as $1, the multilib dirname as $2
_shlibdirs = \
	$(if $(strip $(1)), \
	  $(shell find $(foreach p,$(1),$(CURDIR)/debian/$(p)) \
		-name '*.so.*' -printf '%h ' | uniq)) \
	$(with_build_sysroot)/lib/$(call mlib_to_march,$(2)) \
	$(with_build_sysroot)/usr/lib/$(call mlib_to_march,$(2)) \
	$(with_build_sysroot)$(subst /usr,,/$(usr_lib$(2))) \
	$(with_build_sysroot)/$(usr_lib$(2)) \
	$(if $(filter yes,$(biarchsf) $(biarchhf)), \
	  $(with_build_sysroot)/usr/$(call mlib_to_march,$(2))/lib)
shlibdirs_to_search = -l$(subst $(SPACE),:,$(foreach d,$(_shlibdirs),$(d)))

# native ... 

ifneq (,$(filter $(DEB_TARGET_ARCH), mips mipsel mips64 mips64el mipsn32 mipsn32el))
  define cross_mangle_control
	$(if $(findstring lib64,$(1)),sed -i -r '/^(Dep|Rec|Sug)/s/libn?32[^$(COMMA)]+($(COMMA) *|$$)//g;/^(Dep|Rec|Sug)/s/$(p_lgcc)/$(p_l64gcc)/;/^(Dep|Rec|Sug)/s/ *$(COMMA) *$$//' debian/$(1)/DEBIAN/control,@:)
	$(if $(findstring libn32,$(1)),sed -i -r '/^(Dep|Rec|Sug)/s/lib64[^$(COMMA)]+($(COMMA) *|$$)//g;/^(Dep|Rec|Sug)/s/$(p_lgcc)/$(p_ln32gcc)/;/^(Dep|Rec|Sug)/s/ *$(COMMA) *$$//' debian/$(1)/DEBIAN/control,@:)
  endef
else
  define cross_mangle_control
  endef
endif