ifndef MAKE
MAKE:=make
endif
ifndef HOSTMAKE
HOSTMAKE=$(MAKE)
endif
HOSTMAKE :=$(shell which $(HOSTMAKE) || type -p $(HOSTMAKE) || echo make)

# If BR2_LEVEL is 0, scale the maximum concurrency with the number of
# CPUs. An additional job is used in order to keep processors busy
# while waiting on I/O.
# If the number of processors is not available, assume one.
ifeq ($(BR2_JLEVEL),0)
PARALLEL_JOBS:=$(shell echo \
	$$((1 + `getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1`)))
else
PARALLEL_JOBS:=$(BR2_JLEVEL)
endif

MAKE1:=$(HOSTMAKE) -j1
MAKE:=$(HOSTMAKE) $(if $(PARALLEL_JOBS),-j$(PARALLEL_JOBS))

# Compute GNU_TARGET_NAME
GNU_TARGET_NAME=$(ARCH)-buildroot-$(TARGET_OS)-$(LIBC)$(ABI)

# Blackfin FLAT needs uclinux
ifeq ($(BR2_bfin)$(BR2_BINFMT_FLAT),yy)
TARGET_OS=uclinux
else
TARGET_OS=linux
endif

ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
LIBC=uclibc
else
LIBC=gnu
endif

# The ABI suffix is a bit special on ARM, as it needs to be
# -uclibcgnueabi for uClibc EABI, and -gnueabi for glibc EABI.
# This means that the LIBC and ABI aren't strictly orthogonal,
# which explains why we need the test on LIBC below.
ifeq ($(BR2_arm)$(BR2_armeb),y)
ifeq ($(LIBC),uclibc)
ABI=gnueabi
else
ABI=eabi
endif

ifeq ($(BR2_ARM_EABIHF),y)
ABI:=$(ABI)hf
endif
endif

# For FSL PowerPC there's SPE
ifeq ($(BR2_powerpc_SPE),y)
ABI=spe
# MPC8540s are e500v1 with single precision FP
ifeq ($(BR2_powerpc_8540),y)
TARGET_ABI+=-mabi=spe -mfloat-gprs=single -Wa,-me500
endif
ifeq ($(BR2_powerpc_8548),y)
TARGET_ABI+=-mabi=spe -mfloat-gprs=double -Wa,-me500x2
endif
ifeq ($(BR2_powerpc_e500mc),y)
TARGET_ABI+=-mabi=spe -mfloat-gprs=double -Wa,-me500mc
endif
endif

# Use longcalls option for Xtensa globally.
# The 'longcalls' option allows calls across a greater range of addresses,
# and is required for some packages. While this option can degrade both
# code size and performance, the linker can usually optimize away the
# overhead when a call ends up within a certain range.
ifeq ($(BR2_xtensa),y)
TARGET_ABI += -mlongcalls
endif

STAGING_SUBDIR = usr/$(GNU_TARGET_NAME)/sysroot
STAGING_DIR    = $(HOST_DIR)/$(STAGING_SUBDIR)

TARGET_OPTIMIZATION:=$(call qstrip,$(BR2_TARGET_OPTIMIZATION))

ifeq ($(BR2_OPTIMIZE_0),y)
TARGET_OPTIMIZATION+=-O0
endif
ifeq ($(BR2_OPTIMIZE_1),y)
TARGET_OPTIMIZATION+=-O1
endif
ifeq ($(BR2_OPTIMIZE_2),y)
TARGET_OPTIMIZATION+=-O2
endif
ifeq ($(BR2_OPTIMIZE_3),y)
TARGET_OPTIMIZATION+=-O3
endif
ifeq ($(BR2_OPTIMIZE_S),y)
TARGET_OPTIMIZATION+=-Os
endif
ifeq ($(BR2_DEBUG_1),y)
TARGET_DEBUGGING=-g1
endif
ifeq ($(BR2_DEBUG_2),y)
TARGET_DEBUGGING=-g2
endif
ifeq ($(BR2_DEBUG_3),y)
TARGET_DEBUGGING=-g3
endif

ifeq ($(BR2_LARGEFILE),y)
TARGET_CPPFLAGS += -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
endif

TARGET_CFLAGS = $(TARGET_CPPFLAGS) $(TARGET_ABI) $(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)
TARGET_CXXFLAGS = $(TARGET_CFLAGS)
TARGET_LDFLAGS = $(call qstrip,$(BR2_TARGET_LDFLAGS))

ifeq ($(BR2_BINFMT_FLAT),y)
TARGET_CFLAGS += $(if $($(PKG)_FLAT_STACKSIZE),-Wl$(comma)-elf2flt=-s$($(PKG)_FLAT_STACKSIZE),\
	-Wl$(comma)-elf2flt)
TARGET_CXXFLAGS += $(if $($(PKG)_FLAT_STACKSIZE),-Wl$(comma)-elf2flt=-s$($(PKG)_FLAT_STACKSIZE),\
	-Wl$(comma)-elf2flt)
TARGET_LDFLAGS += $(if $($(PKG)_FLAT_STACKSIZE),-elf2flt=-s$($(PKG)_FLAT_STACKSIZE),-elf2flt)
endif

ifeq ($(BR2_BINFMT_FLAT_SHARED),y)
TARGET_LDFLAGS += -mid-shared-library -mshared-library-id=0
TARGET_CFLAGS += -mid-shared-library -mshared-library-id=0
TARGET_CXXFLAGS += -mid-shared-library -mshared-library-id=0
endif
ifeq ($(BR2_BINFMT_FLAT_SEP_DATA),y)
TARGET_LDFLAGS += -msep-data
TARGET_CFLAGS += -msep-data
TARGET_CXXFLAGS += -msep-data
endif

ifeq ($(BR2_ENABLE_SSP),y)
TARGET_CFLAGS += -fstack-protector-all
TARGET_CXXFLAGS += -fstack-protector-all
endif

ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)
TARGET_CROSS=$(HOST_DIR)/usr/bin/$(GNU_TARGET_NAME)-
else
TARGET_CROSS=$(HOST_DIR)/usr/bin/$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))-
endif

# Quotes are needed for spaces et al in path components.
TARGET_PATH="$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(HOST_DIR)/usr/sbin/:$(PATH)"

# Define TARGET_xx variables for all common binutils/gcc
TARGET_AR       = $(TARGET_CROSS)ar
TARGET_AS       = $(TARGET_CROSS)as
TARGET_CC       = $(TARGET_CROSS)gcc
TARGET_CPP      = $(TARGET_CROSS)cpp
TARGET_CXX      = $(TARGET_CROSS)g++
TARGET_FC       = $(TARGET_CROSS)gfortran
TARGET_LD       = $(TARGET_CROSS)ld
TARGET_NM       = $(TARGET_CROSS)nm
TARGET_RANLIB   = $(TARGET_CROSS)ranlib
TARGET_READELF  = $(TARGET_CROSS)readelf
TARGET_OBJCOPY  = $(TARGET_CROSS)objcopy
TARGET_OBJDUMP  = $(TARGET_CROSS)objdump

TARGET_CC_NOCCACHE  := $(TARGET_CC)
TARGET_CXX_NOCCACHE := $(TARGET_CXX)

ifeq ($(BR2_CCACHE),y)
TARGET_CC  := $(CCACHE) $(TARGET_CC)
TARGET_CXX := $(CCACHE) $(TARGET_CXX)
endif

ifeq ($(BR2_STRIP_strip),y)
STRIP_STRIP_DEBUG:=--strip-debug
STRIP_STRIP_UNNEEDED:=--strip-unneeded
STRIP_STRIP_ALL:=--strip-all
TARGET_STRIP=$(TARGET_CROSS)strip
STRIPCMD=$(TARGET_CROSS)strip --remove-section=.comment --remove-section=.note
KSTRIPCMD=$(STRIPCMD) $(STRIP_STRIP_UNNEEDED)
endif
ifeq ($(BR2_STRIP_sstrip),y)
STRIP_STRIP_DEBUG:=
STRIP_STRIP_UNNEEDED:=
STRIP_STRIP_ALL:=
TARGET_STRIP=$(HOST_DIR)/usr/bin/$(GNU_TARGET_NAME)-sstrip
STRIPCMD=$(TARGET_STRIP)
KSTRIPCMD=$(TARGET_CROSS)strip --remove-section=.comment --remove-section=.note --strip-unneeded
endif
ifeq ($(BR2_STRIP_none),y)
TARGET_STRIP=true
STRIPCMD=$(TARGET_STRIP)
KSTRIPCMD=$(TARGET_STRIP)
endif
INSTALL:=$(shell which install || type -p install)
FLEX:=$(shell which flex || type -p flex)
BISON:=$(shell which bison || type -p bison)
SED:=$(shell which sed || type -p sed) -i -e

HOST_CPPFLAGS  = -I$(HOST_DIR)/usr/include
HOST_CFLAGS   ?= -O2
HOST_CFLAGS   += $(HOST_CPPFLAGS)
HOST_CXXFLAGS += $(HOST_CFLAGS)
HOST_LDFLAGS  += -L$(HOST_DIR)/lib -L$(HOST_DIR)/usr/lib -Wl,-rpath,$(HOST_DIR)/usr/lib
HOST_PATH=$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(PATH)

# hostcc version as an integer - E.G. 4.3.2 => 432
HOSTCC_VERSION:=$(shell $(HOSTCC_NOCCACHE) --version | \
	sed -n 's/^.* \([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)[ ]*.*$$/\1\2\3/p')

TARGET_CONFIGURE_OPTS=PATH=$(TARGET_PATH) \
		AR="$(TARGET_AR)" \
		AS="$(TARGET_AS)" \
		LD="$(TARGET_LD)" \
		NM="$(TARGET_NM)" \
		CC="$(TARGET_CC)" \
		GCC="$(TARGET_CC)" \
		CPP="$(TARGET_CPP)" \
		CXX="$(TARGET_CXX)" \
		FC="$(TARGET_FC)" \
		RANLIB="$(TARGET_RANLIB)" \
		READELF="$(TARGET_READELF)" \
		STRIP="$(TARGET_STRIP)" \
		OBJCOPY="$(TARGET_OBJCOPY)" \
		OBJDUMP="$(TARGET_OBJDUMP)" \
		AR_FOR_BUILD="$(HOSTAR)" \
		AS_FOR_BUILD="$(HOSTAS)" \
		CC_FOR_BUILD="$(HOSTCC)" \
		GCC_FOR_BUILD="$(HOSTCC)" \
		CXX_FOR_BUILD="$(HOSTCXX)" \
		FC_FOR_BUILD="$(HOSTFC)" \
		LD_FOR_BUILD="$(HOSTLD)" \
		CPPFLAGS_FOR_BUILD="$(HOST_CPPFLAGS)" \
		CFLAGS_FOR_BUILD="$(HOST_CFLAGS)" \
		CXXFLAGS_FOR_BUILD="$(HOST_CXXFLAGS)" \
		LDFLAGS_FOR_BUILD="$(HOST_LDFLAGS)" \
		FCFLAGS_FOR_BUILD="$(HOST_FCFLAGS)" \
		DEFAULT_ASSEMBLER="$(TARGET_AS)" \
		DEFAULT_LINKER="$(TARGET_LD)" \
		CPPFLAGS="$(TARGET_CPPFLAGS)" \
		CFLAGS="$(TARGET_CFLAGS)" \
		CXXFLAGS="$(TARGET_CXXFLAGS)" \
		LDFLAGS="$(TARGET_LDFLAGS)" \
		FCFLAGS="$(TARGET_FCFLAGS)" \
		PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
		PERLLIB="$(HOST_DIR)/usr/lib/perl" \
		STAGING_DIR="$(STAGING_DIR)"

TARGET_MAKE_ENV=PATH=$(TARGET_PATH) \
		PERLLIB="$(HOST_DIR)/usr/lib/perl"

HOST_CONFIGURE_OPTS=PATH=$(HOST_PATH) \
		AR="$(HOSTAR)" \
		AS="$(HOSTAS)" \
		LD="$(HOSTLD)" \
		NM="$(HOSTNM)" \
		CC="$(HOSTCC)" \
		GCC="$(HOSTCC)" \
		CXX="$(HOSTCXX)" \
		CPP="$(HOSTCPP)" \
		OBJCOPY="$(HOSTOBJCOPY)" \
		RANLIB="$(HOSTRANLIB)" \
		CPPFLAGS="$(HOST_CPPFLAGS)" \
		CFLAGS="$(HOST_CFLAGS)" \
		CXXFLAGS="$(HOST_CXXFLAGS)" \
		LDFLAGS="$(HOST_LDFLAGS)" \
		PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 \
		PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 \
		PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
		PKG_CONFIG_SYSROOT_DIR="/" \
		PKG_CONFIG_LIBDIR="$(HOST_DIR)/usr/lib/pkgconfig:$(HOST_DIR)/usr/share/pkgconfig" \
		PERLLIB="$(HOST_DIR)/usr/lib/perl" \
		LD_LIBRARY_PATH="$(HOST_DIR)/usr/lib:$(LD_LIBRARY_PATH)"

HOST_MAKE_ENV=PATH=$(HOST_PATH) \
		LD_LIBRARY_PATH="$(HOST_DIR)/usr/lib:$(LD_LIBRARY_PATH)" \
		PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
		PKG_CONFIG_SYSROOT_DIR="/" \
		PKG_CONFIG_LIBDIR="$(HOST_DIR)/usr/lib/pkgconfig" \
		PERLLIB="$(HOST_DIR)/usr/lib/perl"

# This extra environment we can not export ourselves (eg. because some
# packages use that variable internally, eg. uboot), so we have to
# explicitly pass it to user-supplied external hooks (eg. post-build,
# post-images)
USER_HOOKS_EXTRA_ENV=\
	BUILD_DIR=$(BUILD_DIR)

################################################################################
# settings we need to pass to configure

# does unaligned access trap?
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=yes
ifeq ($(BR2_i386),y)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_x86_64),y)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_m68k),y)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_powerpc)$(BR2_ENDIAN),yBIG)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif

ifeq ($(BR2_ENDIAN),"BIG")
BR2_AC_CV_C_BIGENDIAN=ac_cv_c_bigendian=yes
else
BR2_AC_CV_C_BIGENDIAN=ac_cv_c_bigendian=no
endif

TARGET_CONFIGURE_ARGS= \
	$(BR2_AC_CV_TRAP_CHECK) \
	ac_cv_func_mmap_fixed_mapped=yes \
	ac_cv_func_memcmp_working=yes \
	ac_cv_have_decl_malloc=yes \
	gl_cv_func_malloc_0_nonnull=yes \
	ac_cv_func_malloc_0_nonnull=yes \
	ac_cv_func_calloc_0_nonnull=yes \
	ac_cv_func_realloc_0_nonnull=yes \
	lt_cv_sys_lib_search_path_spec="" \
	$(BR2_AC_CV_C_BIGENDIAN)

################################################################################

ifeq ($(BR2_ENABLE_LOCALE),y)
DISABLE_NLS:=
else
DISABLE_NLS:=--disable-nls
endif

ifneq ($(BR2_LARGEFILE),y)
DISABLE_LARGEFILE= --disable-largefile
endif

ifneq ($(BR2_HAVE_DOCUMENTATION),y)
# The configure option varies, but since unknown options are ignored
# we can pass all of them.
DISABLE_DOCUMENTATION = \
	--disable-gtk-doc \
	--disable-doc \
	--disable-docs \
	--disable-documentation \
	--with-xmlto=no \
	--with-fop=no
endif

ifeq ($(BR2_INET_IPV6),y)
DISABLE_IPV6= --enable-ipv6
else
DISABLE_IPV6= --disable-ipv6
endif

ifneq ($(BR2_INSTALL_LIBSTDCPP),y)
TARGET_CONFIGURE_OPTS+=CXX=false
endif

ifeq ($(BR2_ENABLE_DEBUG),y)
ENABLE_DEBUG:=--enable-debug
else
ENABLE_DEBUG:=
endif

ifeq ($(BR2_PREFER_STATIC_LIB),y)
SHARED_STATIC_LIBS_OPTS=--enable-static --disable-shared
TARGET_LDFLAGS += --static
else
SHARED_STATIC_LIBS_OPTS=--enable-static --enable-shared
endif

include package/pkg-utils.mk
include package/pkg-download.mk
include package/pkg-autotools.mk
include package/pkg-cmake.mk
include package/pkg-generic.mk