UCLIBC_VERSION:=$(TARGET_TOOLCHAIN_UCLIBC_VERSION)
UCLIBC_DIR:=$(TARGET_TOOLCHAIN_DIR)/uClibc$(if $(FREETZ_TARGET_UCLIBC_1),-ng)-$(UCLIBC_VERSION)
UCLIBC_MAKE_DIR:=$(TOOLCHAIN_DIR)/make/target/uclibc
UCLIBC_SOURCE:=uClibc$(if $(FREETZ_TARGET_UCLIBC_1),-ng)-$(UCLIBC_VERSION).tar.$(if $(FREETZ_TARGET_UCLIBC_1),xz,bz2)
UCLIBC_SOURCE_SITE_0:=http://www.uclibc.org/downloads$(if $(or $(FREETZ_TARGET_UCLIBC_0_9_28),$(FREETZ_TARGET_UCLIBC_0_9_29)),/old-releases)
UCLIBC_SOURCE_SITE_1:=https://downloads.uclibc-ng.org/releases/$(TARGET_TOOLCHAIN_UCLIBC_VERSION)
UCLIBC_SOURCE_SITE  :=$(UCLIBC_SOURCE_SITE_$(TARGET_TOOLCHAIN_UCLIBC_MAJOR_VERSION))

UCLIBC_MD5_0.9.28    = 1ada58d919a82561061e4741fb6abd29
UCLIBC_MD5_0.9.29    = 61dc55f43b17a38a074f347e74095b20
UCLIBC_MD5_0.9.32.1  = ade6e441242be5cdd735fec97954a54a
UCLIBC_MD5_0.9.33.2  = a338aaffc56f0f5040e6d9fa8a12eda1
UCLIBC_SHA256_1.0.14 = 3c63d9f8c8b98b65fa5c4040d1c8ab1b36e99a16e1093810cedad51ac15c9a9e
UCLIBC_SHA256_1.0.15 = 0f62f35217d9a0b5eb3810dd6de16ab3dd4323f3224c6b95423250ac1e19ee49
UCLIBC_SHA256_1.0.36 = 010f40841669809422e01b47e7169d49c61bf3382f493c2571a8a96634ed300c
UCLIBC_SOURCE_CHECKSUM=$(or $(UCLIBC_SHA256_$(UCLIBC_VERSION)),$(UCLIBC_MD5_$(UCLIBC_VERSION)))

UCLIBC_KERNEL_HEADERS_DIR:=$(KERNEL_HEADERS_DEVEL_DIR)

UCLIBC_DEVEL_SUBDIR:=uClibc_dev

UCLIBC_CONFIG_FILE:=$(UCLIBC_MAKE_DIR)/configs/freetz/config-$(FREETZ_TARGET_ARCH)-$(UCLIBC_VERSION)

UCLIBC_TARGET_SUBDIR:=$(if $(FREETZ_SEPARATE_AVM_UCLIBC),usr/lib/freetz,lib)

# uClibc >= 0.9.31 supports parallel building
# TODO 1.0.14: reenable parallel building for 1.0.x
UCLIBC_MAKE:=$(if $(or $(FREETZ_TARGET_UCLIBC_0_9_28),$(FREETZ_TARGET_UCLIBC_0_9_29),$(FREETZ_TARGET_UCLIBC_1_0_14),$(FREETZ_TARGET_UCLIBC_1_0_15)),$(MAKE1),$(MAKE)) 

UCLIBC_COMMON_BUILD_FLAGS:=

# uClibc pregenerated locale data
UCLIBC_LOCALE_DATA_SITE:=http://www.uclibc.org/downloads
# TODO: FREETZ_TARGET_UCLIBC_REDUCED_LOCALE_SET is a REBUILD_SUBOPT
ifeq ($(strip $(FREETZ_TARGET_UCLIBC_REDUCED_LOCALE_SET)),y)
UCLIBC_LOCALE_DATA_FILENAME:=uClibc-locale-$(if $(FREETZ_TARGET_ARCH_BE),be,le)-32-de_DE-en_US.tar.gz
UCLIBC_LOCALE_DATA_MD5:=$(if $(FREETZ_TARGET_ARCH_BE),d9fe91b13b72d52a97b3dcbaea41e85a,8cd279892f77c850ca365452f7841937)
else
UCLIBC_LOCALE_DATA_FILENAME:=uClibc-locale-030818.tgz
UCLIBC_LOCALE_DATA_MD5:=d75b2239b4e27c3c9cbed1c8f6eabba6
endif
UCLIBC_COMMON_BUILD_FLAGS += LOCALE_DATA_FILENAME=$(UCLIBC_LOCALE_DATA_FILENAME)

ifeq ($(strip $(FREETZ_TARGET_ARCH_MIPS)),y)
UCLIBC_COMMON_BUILD_FLAGS += MIPS_CUSTOM_ARCH_CPU_CFLAGS="$(strip $(filter -march=% -mcpu=% -mtune=%,$(TARGET_CFLAGS_HW_CAPABILITIES)))"
endif
UCLIBC_COMMON_BUILD_FLAGS += $(if $(FREETZ_TARGET_UCLIBC_DODEBUG),$(if $(FREETZ_TARGET_UCLIBC_DODEBUG_MAXIMUM),DEBUG_LEVEL=3))

ifeq ($(strip $(FREETZ_VERBOSITY_LEVEL)),2)
ifeq ($(or $(FREETZ_TARGET_UCLIBC_0_9_32),$(FREETZ_TARGET_UCLIBC_0_9_33)),y)
# Changed with uClibc-0.9.32-rc3: "V=1 is quiet plus defines. V=2 are verbatim commands."
# For more details see <http://lists.uclibc.org/pipermail/uclibc/2011-March/045005.html>
UCLIBC_COMMON_BUILD_FLAGS += V=2
# Changed once again in uClibc-ng
# See https://github.com/wbx-github/uclibc-ng/commit/98d8242d872774356d8efb93857036f3a26578d7
else
UCLIBC_COMMON_BUILD_FLAGS += V=1
endif
endif

UCLIBC_HOST_CFLAGS:=$(TOOLCHAIN_HOST_CFLAGS) -U_GNU_SOURCE -fno-strict-aliasing

$(DL_DIR)/$(UCLIBC_LOCALE_DATA_FILENAME): | $(DL_DIR)
	$(DL_TOOL) $(DL_DIR) $(UCLIBC_LOCALE_DATA_FILENAME) $(UCLIBC_LOCALE_DATA_SITE) $(UCLIBC_LOCALE_DATA_MD5)

uclibc-source: $(DL_DIR)/$(UCLIBC_SOURCE)
$(DL_DIR)/$(UCLIBC_SOURCE): | $(DL_DIR)
	$(DL_TOOL) $(DL_DIR) $(UCLIBC_SOURCE) $(UCLIBC_SOURCE_SITE) $(UCLIBC_SOURCE_CHECKSUM)

uclibc-unpacked: $(UCLIBC_DIR)/.unpacked
$(UCLIBC_DIR)/.unpacked: $(DL_DIR)/$(UCLIBC_SOURCE) $(DL_DIR)/$(UCLIBC_LOCALE_DATA_FILENAME) | $(TARGET_TOOLCHAIN_DIR) $(UNPACK_TARBALL_PREREQUISITES)
	$(RM) -r $(UCLIBC_DIR)
	$(call UNPACK_TARBALL,$(DL_DIR)/$(UCLIBC_SOURCE),$(TARGET_TOOLCHAIN_DIR))
	$(call APPLY_PATCHES,$(UCLIBC_MAKE_DIR)/$(UCLIBC_VERSION)/avm $(UCLIBC_MAKE_DIR)/$(UCLIBC_VERSION),$(UCLIBC_DIR))
ifeq ($(FREETZ_TARGET_UCLIBC_0_9_33),y)
# "remove"-part of 980-nptl_remove_duplicate_vfork_in_libpthread
# instead of removing files using patch, we remove them using rm
# see http://lists.uclibc.org/pipermail/uclibc/2014-September/048597.html for details
	find $(UCLIBC_DIR)/libpthread/nptl -name "*pt-vfork*" -exec $(RM) {} \+
endif
	cp -dpf $(DL_DIR)/$(UCLIBC_LOCALE_DATA_FILENAME) $(UCLIBC_DIR)/extra/locale/
	touch $@

ifeq ($(strip $(FREETZ_BUILD_TOOLCHAIN)),y)
UCLIBC_PREREQ_GCC_INITIAL=$(GCC_BUILD_DIR1)/.installed
else
UCLIBC_PREREQ_GCC_INITIAL=$(TARGET_CROSS_COMPILER)
endif

uclibc-config: $(UCLIBC_DIR)/.config
$(UCLIBC_DIR)/.config: $(UCLIBC_DIR)/.unpacked | $(UCLIBC_PREREQ_GCC_INITIAL)
	cp $(UCLIBC_CONFIG_FILE) $(UCLIBC_DIR)/.config
	$(call PKG_EDIT_CONFIG,CROSS=$(TARGET_MAKE_PATH)/$(TARGET_CROSS)) $(UCLIBC_DIR)/Rules.mak
	$(call PKG_EDIT_CONFIG, \
		$(if $(FREETZ_TARGET_UCLIBC_0_9_28), \
			KERNEL_SOURCE=\"$(UCLIBC_KERNEL_HEADERS_DIR)\" \
		, \
			KERNEL_HEADERS=\"$(UCLIBC_KERNEL_HEADERS_DIR)/include\" \
			ARCH_WANTS_LITTLE_ENDIAN=$(if $(FREETZ_TARGET_ARCH_BE),n,y) \
			ARCH_WANTS_BIG_ENDIAN=$(if $(FREETZ_TARGET_ARCH_BE),y,n) \
		) \
		CONFIG_MIPS_ISA_MIPS32=$(if $(FREETZ_TARGET_ARCH_LE),y,n) \
		CONFIG_MIPS_ISA_MIPS32R2=$(if $(FREETZ_TARGET_ARCH_BE),y,n) \
		UCLIBC_HAS_IPV6=$(FREETZ_TARGET_IPV6_SUPPORT) \
		UCLIBC_HAS_FOPEN_LARGEFILE_MODE=n \
		UCLIBC_HAS_WCHAR=y \
		UCLIBC_HAS_XLOCALE=$(if $(FREETZ_AVM_UCLIBC_XLOCALE_ENABLED),y,n) \
		\
		$(if $(or $(FREETZ_TARGET_UCLIBC_0_9_28),$(FREETZ_TARGET_UCLIBC_0_9_29)),, \
			LINUXTHREADS_OLD=$(if $(FREETZ_AVM_UCLIBC_NPTL_ENABLED),n,y) \
			UCLIBC_HAS_THREADS_NATIVE=$(if $(FREETZ_AVM_UCLIBC_NPTL_ENABLED),y,n) \
			UCLIBC_HAS_BACKTRACE=$(if $(FREETZ_TARGET_UCLIBC_SUPPORTS_libubacktrace),y,n) \
		) \
		\
		DODEBUG=$(if $(FREETZ_TARGET_UCLIBC_DODEBUG),y,n) \
	) $(UCLIBC_DIR)/.config

	mkdir -p $(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/usr/include
	mkdir -p $(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/usr/lib
	mkdir -p $(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/lib
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX=$(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/ \
		DEVEL_PREFIX=/usr/ \
		RUNTIME_PREFIX=$(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/ \
		HOSTCC="$(TOOLCHAIN_HOSTCC) $(UCLIBC_HOST_CFLAGS)" \
		oldconfig < /dev/null > /dev/null
	touch $@

$(UCLIBC_DIR)/.configured: $(UCLIBC_DIR)/.config | $(UCLIBC_KERNEL_HEADERS_DIR)/include/linux/version.h $(UCLIBC_PREREQ_GCC_INITIAL)
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX=$(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/ \
		DEVEL_PREFIX=/usr/ \
		RUNTIME_PREFIX=$(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/ \
		HOSTCC="$(TOOLCHAIN_HOSTCC) $(UCLIBC_HOST_CFLAGS)" headers \
		$(if $(FREETZ_TARGET_UCLIBC_0_9_28),install_dev,install_headers)
	touch $@

uclibc-menuconfig: $(UCLIBC_DIR)/.config
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX=$(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/ \
		DEVEL_PREFIX=/usr/ \
		RUNTIME_PREFIX=$(TARGET_TOOLCHAIN_DIR)/$(UCLIBC_DEVEL_SUBDIR)/ \
		HOSTCC="$(TOOLCHAIN_HOSTCC) $(UCLIBC_HOST_CFLAGS)" \
		menuconfig && \
	cp -f $^ $(UCLIBC_CONFIG_FILE) && \
	touch $^

$(UCLIBC_DIR)/lib/libc.a: $(UCLIBC_DIR)/.configured | $(UCLIBC_PREREQ_GCC_INITIAL)
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX= \
		DEVEL_PREFIX=/ \
		RUNTIME_PREFIX=/ \
		HOSTCC="$(TOOLCHAIN_HOSTCC) $(UCLIBC_HOST_CFLAGS)" \
		all
ifneq ($(or $(FREETZ_TARGET_UCLIBC_0_9_28),$(FREETZ_TARGET_UCLIBC_0_9_29)),y)
	# At this point uClibc is compiled and there is no reason for us to recompile it.
	# Remove some FORCE rule dependencies causing parts of uClibc to be recompiled (without a need)
	# over and over again each time make is invoked within uClibc dir (the actual target doesn't matter).
	# This is a bit dirty workaround we actually should get rid of as soon as we find a better solution.
	for i in $(UCLIBC_DIR)/Makerules $(UCLIBC_DIR)/extra/locale/Makefile.in; do \
		cp -a "$$i" "$$i-with-FORCE"; \
		sed -i -r -e '/.*%[.]o[sS]:.*FORCE.*/s, FORCE , ,g' $$i; \
	done;
endif
	touch -c $@

ifeq ($(strip $(FREETZ_BUILD_TOOLCHAIN)),y)
$(TARGET_TOOLCHAIN_STAGING_DIR)/usr/lib/libc.a: $(UCLIBC_DIR)/lib/libc.a
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX=/ \
		DEVEL_PREFIX=$(TARGET_TOOLCHAIN_STAGING_DIR)/usr/ \
		RUNTIME_PREFIX=$(TARGET_TOOLCHAIN_STAGING_DIR)/usr/ \
		install_runtime install_dev
	# Copy some files to make mklibs happy
	# Note: uclibc 1.0.18+ has a single libc and does not build libpthread etc. anymore
	# Ref.: https://github.com/wbx-github/uclibc-ng/commit/29ff9055c80efe77a7130767a9fcb3ab8c67e8ce
ifeq  ($(strip $(UCLIBC_VERSION)),$(filter $(strip $(UCLIBC_VERSION)),0.9.29 0.9.32 0.9.33 1.0.14 1.0.15))
	for f in libc_pic.a libdl_pic.a libpthread_pic.a; do \
		$(RM) $(TARGET_TOOLCHAIN_STAGING_DIR)/lib/$$f; \
	done; \
	cp $(UCLIBC_DIR)/libc/libc_so.a $(TARGET_TOOLCHAIN_STAGING_DIR)/lib/libc_pic.a; \
	cp $(UCLIBC_DIR)/libpthread/*/libpthread_so.a $(TARGET_TOOLCHAIN_STAGING_DIR)/lib/libpthread_pic.a ; \
	cp $(UCLIBC_DIR)/ldso/libdl/libdl_so.a $(TARGET_TOOLCHAIN_STAGING_DIR)/lib/libdl_pic.a
endif
	# Build the host utils.
	# Note: in order the host utils to work the __ELF_NATIVE_CLASS (= __WORDSIZE) of the target
	# must be known. That's the reason we provide -DARCH_NATIVE_BIT=32 here.
	# uClibc-0.9.28: no fix required
	# uClibc-0.9.29/uClibc-0.9.32: 990-ldd_fix_host_ldd...patch requires ARCH_NATIVE_BIT to be provided externally
	# uClibc-0.9.33: 990-ldd_fix_host_ldd...patch(es) contain all required changes
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR)/utils \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX=$(TARGET_TOOLCHAIN_STAGING_DIR) \
		HOSTCC="$(TOOLCHAIN_HOSTCC) $(UCLIBC_HOST_CFLAGS) $(if $(or $(FREETZ_TARGET_UCLIBC_0_9_29),$(FREETZ_TARGET_UCLIBC_0_9_32)),-DARCH_NATIVE_BIT=32)" \
		BUILD_LDFLAGS="" \
		hostutils
	for i in ldd ldconfig; do \
		install -c $(UCLIBC_DIR)/utils/$$i.host $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/$(REAL_GNU_TARGET_NAME)/bin/$$i; \
		$(HOST_STRIP) $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/$(REAL_GNU_TARGET_NAME)/bin/$$i; \
		ln -sf ../$(REAL_GNU_TARGET_NAME)/bin/$$i $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/bin/$(REAL_GNU_TARGET_NAME)-$$i; \
		ln -sf $(REAL_GNU_TARGET_NAME)-$$i $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/bin/$(GNU_TARGET_NAME)-$$i; \
	done
	touch -c $@

$(TARGET_SPECIFIC_ROOT_DIR)/$(UCLIBC_TARGET_SUBDIR)/libc.so.$(TARGET_TOOLCHAIN_UCLIBC_MAJOR_VERSION): $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/lib/libc.a
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX="$(FREETZ_BASE_DIR)/$(TARGET_SPECIFIC_ROOT_DIR)" \
		DEVEL_PREFIX=/usr/ \
		RUNTIME_PREFIX=/ \
		install_runtime
	touch -c $@
else
$(TARGET_TOOLCHAIN_STAGING_DIR)/usr/lib/libc.a: $(TARGET_CROSS_COMPILER)
	touch -c $@

$(TARGET_SPECIFIC_ROOT_DIR)/$(UCLIBC_TARGET_SUBDIR)/libc.so.$(TARGET_TOOLCHAIN_UCLIBC_MAJOR_VERSION): $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/lib/libc.a
	@$(RM) -r $(TARGET_SPECIFIC_ROOT_DIR)/lib $(TARGET_SPECIFIC_ROOT_DIR)/usr
	@mkdir -p $(TARGET_SPECIFIC_ROOT_DIR)/$(UCLIBC_TARGET_SUBDIR)
	for i in $(UCLIBC_FILES); do \
		cp -a $(TARGET_TOOLCHAIN_STAGING_DIR)/lib/$$i $(TARGET_SPECIFIC_ROOT_DIR)/$(UCLIBC_TARGET_SUBDIR)/$$i; \
	done
	ln -sf libuClibc-$(UCLIBC_VERSION).so $(TARGET_SPECIFIC_ROOT_DIR)/$(UCLIBC_TARGET_SUBDIR)/libc.so
	touch -c $@
endif

uclibc-configured: kernel-configured $(UCLIBC_DIR)/.configured

uclibc: $(UCLIBC_PREREQ_GCC_INITIAL) $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/lib/libc.a $(TARGET_SPECIFIC_ROOT_DIR)/$(UCLIBC_TARGET_SUBDIR)/libc.so.$(TARGET_TOOLCHAIN_UCLIBC_MAJOR_VERSION)

uclibc-clean:
	-$(MAKE1) -C $(UCLIBC_DIR) clean
	$(RM) $(UCLIBC_DIR)/.config

uclibc-dirclean:
	$(RM) -r $(UCLIBC_DIR)

#############################################################
#
# uClibc for the target
#
#############################################################

$(TARGET_UTILS_DIR)/usr/lib/libc.a: $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/lib/libc.a
	$(UCLIBC_MAKE) -C $(UCLIBC_DIR) \
		$(UCLIBC_COMMON_BUILD_FLAGS) \
		PREFIX=$(TARGET_UTILS_DIR) \
		DEVEL_PREFIX=/usr/ \
		RUNTIME_PREFIX=/ \
		RUNTIME_PREFIX_LIB_FROM_DEVEL_PREFIX_LIB=/lib/ \
		install_dev
	# create two additional symlinks, required because libc.so is not really
	# a shared lib, but a GNU ld script referencing the libs below
	for f in libc.so.$(TARGET_TOOLCHAIN_UCLIBC_MAJOR_VERSION) $(sort ld-uClibc.so.0 ld-uClibc.so.$(TARGET_TOOLCHAIN_UCLIBC_MAJOR_VERSION)); do \
		ln -fs /lib/$$f $(TARGET_UTILS_DIR)/usr/lib/; \
	done
	$(call COPY_KERNEL_HEADERS,$(UCLIBC_KERNEL_HEADERS_DIR),$(TARGET_UTILS_DIR)/usr)
	$(call REMOVE_DOC_NLS_DIRS,$(TARGET_UTILS_DIR))
	touch -c $@

uclibc_target: gcc uclibc $(TARGET_UTILS_DIR)/usr/lib/libc.a

uclibc_target-clean: uclibc_target-dirclean
	$(RM) $(TARGET_UTILS_DIR)/lib/libc.a

uclibc_target-dirclean:
	$(RM) -r $(TARGET_UTILS_DIR)/usr/include

.PHONY: uclibc-source uclibc-unpacked uclibc-menuconfig \
	uclibc-configured uclibc uclibc-clean uclibc-dirclean \
	uclibc_target uclibc_target-clean uclibc_target-dirclean