# Makefile fragment for building toolchain with crosstool-NG
# As a reference, you can look at toolchain/toolchain-external/ext-tool.mk
# for a generic approach to external toolchains.
# crosstool-NG as a backend is but a kind of external toolchains,
# except that it is not pre-built.
#-----------------------------------------------------------------------------
# Internal variables
CTNG_DIR := $(BUILD_DIR)/build-toolchain
CTNG_UCLIBC_CONFIG_FILE := $(TOPDIR)/toolchain/uClibc/uClibc-0.9.33.config
CTNG_CONFIG_FILE:=$(call qstrip,$(BR2_TOOLCHAIN_CTNG_CONFIG))
# Hack! ct-ng is in fact a Makefile script. As such, it accepts all
# make options, such as -C, which makes it uneeded to chdir prior
# to calling ct-ng.
# $1: the set of arguments to pass to ct-ng
define ctng
PATH=$(HOST_PATH) ct-ng -C $(CTNG_DIR) --no-print-directory $(1)
endef
#-----------------------------------------------------------------------------
# 'uclibc' is the target to depend on to get the toolchain and prepare
# the staging directory and co.
uclibc: dependencies $(STAMP_DIR)/ct-ng-toolchain-installed
# 'uclibc-source' is the target used by the infra structure to mean
# "we just want to download the toolchain's sources, not build it"
# For crosstool-NG, we need it to be configured before we can download;
# then we have to override a config option to just do the download
uclibc-source: $(CTNG_DIR)/.config
$(Q)$(call ctng,build CT_ONLY_DOWNLOAD=y)
#-----------------------------------------------------------------------------
# Installing the libs to target/ and staging/
#--------------
# The generic system libraries (in /lib)
CTNG_LIBS_LIB := ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so \
libnsl.so libpthread.so libresolv.so librt.so libutil.so
#--------------
# The libc-specific system libraries (in /lib)
# Note: it may be needed to tweak the NSS libs in the glibc and eglibc cases...
CTNG_LIBS_uClibc :=
CTNG_LIBS_glibc := libnss_files.so libnss_dns.so
CTNG_LIBS_eglibc := $(CTNG_LIBS_glibc)
#--------------
# All that we need in /lib
CTNG_LIBS_LIB += $(CTNG_LIBS_$(call qstrip,$(BR2_TOOLCHAIN_CTNG_LIBC)))
#--------------
# All that we need in /usr/lib
ifneq ($(BR2_INSTALL_LIBSTDCPP),)
CTNG_LIBS_USR_LIB += libstdc++.so
endif
#--------------
# Actual copy
$(STAMP_DIR)/ct-ng-toolchain-installed: $(STAMP_DIR)/ct-ng-toolchain-built
$(Q)mkdir -p $(TARGET_DIR)/lib
$(Q)CTNG_TUPLE="$$( $(call ctng,show-tuple) )"; \
CTNG_SYSROOT="$(HOST_DIR)/usr/$${CTNG_TUPLE}/sysroot"; \
echo "CTNG_TUPLE='$${CTNG_TUPLE}'"; \
echo "CTNG_SYSROOT='$${CTNG_SYSROOT}'"; \
echo "Copy external toolchain libraries to target..."; \
for libs in $(CTNG_LIBS_LIB); do \
$(call copy_toolchain_lib_root,$${CTNG_SYSROOT},,lib,$$libs,/lib); \
done; \
for libs in $(CTNG_LIBS_USR_LIB); do \
$(call copy_toolchain_lib_root,$${CTNG_SYSROOT},,lib,$$libs,/usr/lib); \
done;
$(Q)touch $@
#-----------------------------------------------------------------------------
# Building the toolchain
# Note: $(STAMP_DIR)/ct-ng-toolchain-built can have more dependencies,
# depending on the selected C library. Those deps are added later
$(STAMP_DIR)/ct-ng-toolchain-built: $(CTNG_DIR)/.config
$(Q)$(call ctng,build.$(BR2_JLEVEL))
$(Q)printf "\n"
$(Q)touch $@
#-----------------------------------------------------------------------------
# Configuring the toolchain
#--------------
# We push BR options down to CT-NG, munging the default configuration
# with sed expressions.
# - first one for non-path options
# - second for path options (because they have no prompt, they
# always get set to the default value)
# - third for C library .config (if it has one, eg. uClibc)
CTNG_FIX_DOT_CONFIG_SED :=
CTNG_FIX_DOT_CONFIG_PATHS_SED :=
CTNG_FIX_DOT_CONFIG_LIBC_SED :=
#--------------
# A few generic functions
# Munge a config file, given a sed expression
# $1: the .config file to munge
# $2: the sed expression to apply
define ctng-fix-dot-config
$(Q)sed -r -e '$(2)' $(1) >$(1).sed
$(Q)cmp $(1) $(1).sed >/dev/null 2>&1 && rm -f $(1).sed || mv -f $(1).sed $(1)
endef
# This function checks the .config did actually change
# If not changed, then current .config will be touched with reference to the
# stamp file. If the configuration did change, nothing is done.
# $1: the current .config to check
# $2: the time-stamped .config file
define ctng-check-config-changed
$(Q)old_md5="$$( grep -v -E '^(#|$$)' $(2) 2>/dev/null \
|md5sum \
|cut -d ' ' -f 1 \
)"; \
new_md5="$$( grep -v -E '^(#|$$)' $(1) 2>/dev/null \
|md5sum \
|cut -d ' ' -f 1 \
)"; \
if [ $${old_md5} = $${new_md5} -a -f $(2) ]; then \
touch -r $(2) $(1); \
fi
endef
#--------------
# Massage BR2_ARCH so that it matches CT-NG's ARCH
#
# Note: a lot of the following tricks would become unneeded if one day
# buildroot and crosstool-NG had matching options, especially for the
# target description: arch name, bitness, endianness...
#
# Note-2: missing conformity check between BR's .config and libc features.
# Use check_uclibc or check_glibc.
# Defaults:
CTNG_ARCH := $(CTNG_BR2_ARCH)
CTNG_ENDIAN :=
CTNG_BIT :=
# Architecture overides, only overide pertinent vars:
ifeq ($(BR2_arm),y)
CTNG_ARCH := arm
CTNG_ENDIAN := LE
else ifeq ($(BR2_armeb),y)
CTNG_ARCH := arm
CTNG_ENDIAN := BE
else ifeq ($(BR2_i386),y)
CTNG_ARCH := x86
CTNG_BIT := 32
else ifeq ($(BR2_mips),y)
CTNG_ARCH := mips
CTNG_ENDIAN := BE
else ifeq ($(BR2_mipsel),y)
CTNG_ARCH := mips
CTNG_ENDIAN := LE
else ifeq ($(BR2_powerpc),y)
CTNG_ARCH := powerpc
CTNG_BIT := 32
else ifeq ($(BR2_x86_64),y)
CTNG_ARCH := x86
CTNG_BIT := 64
# Add other architecture overides below:
# - keep alphabetic order
# - duplicate next 4 lines, and uncomment
# else ifeq ($(BR2_<arch_name_here>),y)
# CTNG_ARCH :=
# CTNG_ENDIAN :=
# CTNG_BIT :=
# - remove unneeded vars
# - add BR arch-name on ifeq line
# - fill-in required CTNG_* vars
endif
#--------------
# Massage BR options into CTNG .config file
# CT_ARCH : handled by the backend mechanism
# CT_ARCH_[BL]E : endianness
# CT_ARCH_(32|64) : bitness
# CT_PREFIX_DIR : install into BR's toolchain dir
# CT_INSTALL_DIR_RO : do *not* chmod a-w the toolchain dir
# CT_LOCAL_TARBALLS_DIR : share downloads with BR
# CT_SYSROOT_DIR_PREFIX : no prefix needed, really
# CT_TARGET_VENDOR : try to set a unique vendor string, to avoid clashing with BR's vendor string
# CT_TARGET_ALIAS : set the target tuple alias to REAL_GNU_TARGET_NAME so that packages' ./configure find the compiler
# CT_DEBUG_gdb : deselect gdb+gdbserver if buildroot builds its own
# CT_CC_LANG_CXX : required if we copy libstdc++.so, and build C++
# CT_LIBC_UCLIBC_CONFIG_FILE: uClibc config file, if needed
#
# Lots of other awfull sed manipulations go here, to override CT-NG's .config
# with BR2 config options.
# Known missing: arch options, uClibc/eglibc config...
#
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_INSTALL_DIR_RO)=y:\# \1 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_ARCH_[BL]E).*:\# \2 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_$(CTNG_ENDIAN)) is not set:\1=y:;
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_ARCH_(32|64)).*:\# \2 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_$(CTNG_BIT)) is not set:\1=y:;
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_TARGET_VENDOR)=.*:\1="unknown":;
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_TARGET_ALIAS)=.*:\1="$(GNU_TARGET_NAME)":;
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_TOOLCHAIN_PKGVERSION)="(.*)":\1="buildroot $(BR2_VERSION_FULL)":;
ifneq ($(call qstrip,$(BR2_USE_MMU)),)
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_USE_MMU) is not set:\1=y:;
else
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_ARCH_USE_MMU)=y:\# \1 is not set:;
endif
ifneq ($(call qstrip,$(BR2_PACKAGE_GDB_SERVER))$(call qstrip,$(BR2_PACKAGE_GDB_HOST)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_DEBUG_gdb)=.*:\# \1 is not set:;
endif
ifeq ($(call qstrip,$(BR2_TOOLCHAIN_CTNG_CXX)),y)
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_CC_LANG_CXX) is not set:\1=y:;
else
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_CC_LANG_CXX)=.*:\# \1 is not set:;
endif
# Shoe-horn CPU variant now
ifneq ($(call qstrip,$(BR2_GCC_TARGET_ARCH)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_ARCH_ARCH)=.*:\1=$(BR2_GCC_TARGET_ARCH):;
endif
ifneq ($(call qstrip,$(BR2_GCC_TARGET_TUNE)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_ARCH_TUNE)=.*:\1=$(BR2_GCC_TARGET_TUNE):;
endif
# And floating point now
ifeq ($(call qstrip,$(BR2_SOFT_FLOAT)),)
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_FLOAT_HW) is not set:\1=y:;
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_ARCH_FLOAT_SW)=y:\# \1 is not set:;
else
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_ARCH_FLOAT_HW)=y:\# \1 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_FLOAT_SW) is not set:\1=y:;
endif
# Thread implementation selection
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_THREADS_NONE).*:\# \2 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_THREADS_LINUXTHREADS).*:\# \2 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_THREADS_NPTL).*:\# \2 is not set:;
ifneq ($(call qstrip,$(BR2_TOOLCHAIN_CTNG_THREADS_PTHREADS))$(call qstrip,$(BR2_TOOLCHAIN_CTNG_THREADS_PTHREADS_OLD)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_THREADS_LINUXTHREADS).*:\2=y:;
ifneq ($(call qstrip,$(BR2_TOOLCHAIN_CTNG_uClibc)),)
ifneq ($(call qstrip,$(BR2_TOOLCHAIN_CTNG_THREADS_PTHREADS_OLD)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_LIBC_UCLIBC_LNXTHRD_NEW).*:\# \2 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_LIBC_UCLIBC_LNXTHRD_OLD).*:\2=y:;
else
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_LIBC_UCLIBC_LNXTHRD_OLD).*:\# \2 is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_LIBC_UCLIBC_LNXTHRD_NEW).*:\2=y:;
endif
endif
else ifneq ($(call qstrip,$(BR2_TOOLCHAIN_CTNG_THREADS_NPTL)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_THREADS_NPTL).*:\2=y:;
else ifneq ($(call qstrip,$(BR2_TOOLCHAIN_CTNG_THREADS_NONE)),)
CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_THREADS_NONE).*:\2=y:;
endif
#--------------
# And the specials for paths
CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_PREFIX_DIR)=.*:\1="$(HOST_DIR)/usr":;
CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_LOCAL_TARBALLS_DIR)=.*:\1="$(DL_DIR)":;
CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_SYSROOT_NAME)=.*:\1="sysroot":;
CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_SYSROOT_DIR_PREFIX)=.*:\1="":;
#--------------
# uClibc specific options
ifeq ($(BR2_TOOLCHAIN_CTNG_uClibc),y)
# Handle the locales option
ifneq ($(call qstrip,$(BR2_ENABLE_LOCALE)),)
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_LIBC_UCLIBC_LOCALES) is not set:\1=y\n\# CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA is not set:;
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA)=.*:\# \1 is not set:;
else
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_LIBC_UCLIBC_LOCALES)=.*:\# \1 is not set:;
endif
# Handle the wide-char option
ifneq ($(call qstrip,$(BR2_USE_WCHAR)),)
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_LIBC_UCLIBC_WCHAR) is not set:\1=y:;
else
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_LIBC_UCLIBC_WCHAR)=.*:\# \1 is not set:;
endif
# Handle the LFS option
ifneq ($(call qstrip,$(BR2_LARGEFILE)),)
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^\# (UCLIBC_HAS_LFS) is not set:\1=y:;
else
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^(UCLIBC_HAS_LFS)=.*:\# \1 is not set:;
endif
# Handle the IPv6 option
ifneq ($(call qstrip,$(BR2_INET_IPV6)),)
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^\# (UCLIBC_HAS_IPV6) is not set:\1=y:;
else
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^(UCLIBC_HAS_IPV6)=.*:\# \1 is not set:;
endif
# Handle the RPC option
ifneq ($(call qstrip,$(BR2_INET_RPC)),)
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^\# (UCLIBC_HAS_RPC) is not set:\1=y\nUCLIBC_HAS_FULL_RPC=y\nUCLIBC_HAS_REENTRANT_RPC=y:;
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^\# (UCLIBC_HAS_FULL_RPC) is not set:\1=y:;
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^\# (UCLIBC_HAS_REENTRANT_RPC) is not set:\1=y:;
else
CTNG_FIX_DOT_CONFIG_LIBC_SED += s:^(UCLIBC_HAS_RPC)=.*:\# \1 is not set:;
endif
# Instruct CT-NG's .config where to find the uClibc's .config
CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_LIBC_UCLIBC_CONFIG_FILE)=.*:\1="$(CTNG_DIR)/libc.config":;
# And add this to the toolchain build dependency
$(STAMP_DIR)/ct-ng-toolchain-built: $(CTNG_DIR)/libc.config
# And here is how we get this uClibc's .config
$(CTNG_DIR)/libc.config: $(CTNG_UCLIBC_CONFIG_FILE) $(CONFIG_DIR)/.config
-$(Q)cp -a $@ $@.timestamp
$(Q)cp -f $< $@
$(call ctng-fix-dot-config,$@,$(CTNG_FIX_DOT_CONFIG_LIBC_SED))
$(call ctng-check-config-changed,$@,$@.timestamp)
$(Q)rm -f $@.timestamp
endif # LIBC is uClibc
#--------------
# glibc/eglibc specific options
ifeq ($(BR2_TOOLCHAIN_CTNG_glibc)$(BR2_TOOLCHAIN_CTNG_eglibc),y)
# Force unwind support
CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_LIBC_GLIBC_FORCE_UNWIND) is not set:\1=y:;
# Force non-fortified build
CTNG_FIX_DOT_CONFIG_SED += s:^(CT_LIBC_ENABLE_FORTIFIED_BUILD)=y:\# \1 is not set:;
endif # LIBC is glibc or eglibc
#--------------
# Small functions to shoe-horn the above into crosstool-NG's .config
# Function to update the .config
# We first munge the .config to shoe-horn defaults, then we push that unto
# crosstool-NG's oldconfig process, to sort out wizy-wazy deps, and then we
# shoe-horn paths again, as they get ripped-out by oldconfig (is that a bug
# or a feature of kconfig?)
# $1: the .config file to munge
define ctng-oldconfig
$(call ctng-fix-dot-config,$(1),$(CTNG_FIX_DOT_CONFIG_SED))
$(Q)yes '' |\
$(call ctng,CT_IS_A_BACKEND=y \
CT_BACKEND_ARCH=$(CTNG_ARCH) \
CT_BACKEND_KERNEL=linux \
CT_BACKEND_LIBC=$(BR2_TOOLCHAIN_CTNG_LIBC) \
oldconfig )
$(call ctng-fix-dot-config,$(1),$(CTNG_FIX_DOT_CONFIG_PATHS_SED))
endef
# We need the host crosstool-NG before we can even begin working
# on the toolchain. Using order-only dependency, as we do not want
# to rebuild the toolchain for every run...
$(CTNG_DIR)/.config: | host-crosstool-ng
# Default configuration
# Depends on top-level .config because it has options we have to shoe-horn
# into crosstool-NG's .config
# Only copy the original .config file if we don't have one already.
# Check that given config file matches selected C library.
# We need to call oldconfig twice in a row to ensure the options
# are correctly set ( eg. if an option is new, then the initial sed
# can't do anything about it ) Ideally, this should go in oldconfig
# itself, but it's much easier to handle here.
$(CTNG_DIR)/.config: $(CTNG_CONFIG_FILE) $(CONFIG_DIR)/.config
$(Q)if [ ! -f $@ ]; then \
mkdir -p "$(CTNG_DIR)"; \
libc="$$(awk -F '"' '$$1=="CT_LIBC=" { print $$2; }' "$<")"; \
if [ "$${libc}" != "$(BR2_TOOLCHAIN_CTNG_LIBC)" ]; then \
echo "* Inconsistency in crosstool-NG config file '$<'"; \
echo "* - buildroot configured for '$(BR2_TOOLCHAIN_CTNG_LIBC)'"; \
echo "* - given config file for '$${libc}'"; \
exit 1; \
fi; \
cp -f $< $@; \
fi
$(Q)cp -a $@ $@.timestamp
$(call ctng-oldconfig,$@)
$(call ctng-oldconfig,$@)
$(call ctng-check-config-changed,$@,$@.timestamp)
$(Q)rm -f $@.timestamp
# Manual configuration
ctng-menuconfig: $(CTNG_DIR)/.config
$(Q)cp -a $< $<.timestamp
$(Q)$(call ctng,CT_IS_A_BACKEND=y \
CT_BACKEND_ARCH=$(CTNG_ARCH) \
CT_BACKEND_KERNEL=linux \
CT_BACKEND_LIBC=$(BR2_TOOLCHAIN_CTNG_LIBC) \
menuconfig )
$(call ctng-oldconfig,$<)
$(call ctng-check-config-changed,$<,$<.timestamp)
$(Q)rm -f $<.timestamp
