diff options
Diffstat (limited to 'toolchain/toolchain-crosstool-ng/crosstool-ng.mk')
| -rw-r--r-- | toolchain/toolchain-crosstool-ng/crosstool-ng.mk | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/toolchain/toolchain-crosstool-ng/crosstool-ng.mk b/toolchain/toolchain-crosstool-ng/crosstool-ng.mk new file mode 100644 index 000000000..34e2ed906 --- /dev/null +++ b/toolchain/toolchain-crosstool-ng/crosstool-ng.mk @@ -0,0 +1,275 @@ +# 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. + +#----------------------------------------------------------------------------- +# 'uclibc' is the target to depend on to get the toolchain and prepare +# the staging directory and co. +uclibc: dependencies $(STAMP_DIR)/ct-ng-toolchain-installed + +#----------------------------------------------------------------------------- +# Internal variables + +# Crostool-NG hard-coded configuration options +CTNG_VERSION:=1.8.0 +CTNG_SITE:=http://ymorin.is-a-geek.org/download/crosstool-ng/ +CTNG_SOURCE:=crosstool-ng-$(CTNG_VERSION).tar.bz2 +CTNG_DIR:=$(BUILD_DIR)/crosstool-ng-$(CTNG_VERSION) +CTNG_CAT:=bzcat +CTNG_PATCH_DIR:=toolchain/toolchain-crosstool-ng +CTNG_CONFIG_FILE:=$(call qstrip,$(BR2_TOOLCHAIN_CTNG_CONFIG)) +CTNG_UCLIBC_CONFIG_FILE := $(TOPDIR)/toolchain/toolchain-crosstool-ng/uClibc.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. +# $1: the set of arguments to pass to ct-ng +define ctng +$(CTNG_DIR)/ct-ng -C $(CTNG_DIR) --no-print-directory $(1) +endef + +#----------------------------------------------------------------------------- +# Installing the libs to target/ and staging/ + +#-------------- +# The generic system libraries (in /lib) +CTNG_LIBS_LIB := 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 := ld-uClibc.so +CTNG_LIBS_glibc := ld-linux.so 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="$$( $(call ctng,show-tuple) )"; \ + CTNG_SYSROOT="$(TOOLCHAIN_DIR)/$${CTNG_TUPLE}/sys-root"; \ + 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,$${CTNG_SYSROOT},$$libs,/lib,$(BR2_TOOLCHAIN_CTNG_STRIP_LIBS)); \ + done; \ + for libs in $(CTNG_LIBS_USR_LIB); do \ + $(call copy_toolchain_lib_root,$${CTNG_SYSROOT},$$libs,/usr/lib,$(BR2_TOOLCHAIN_CTNG_STRIP_LIBS)); \ + done; \ + echo "Copy external toolchain sysroot to staging..."; \ + $(call copy_toolchain_sysroot,$${CTNG_SYSROOT},$${CTNG_SYSROOT},) + $(Q)touch $@ + +#----------------------------------------------------------------------------- +# Building the toolchain + +$(STAMP_DIR)/ct-ng-toolchain-built: $(CTNG_DIR)/.config + $(Q)$(call ctng,build.$(BR2_JLEVEL)) + $(Q)printf "\n" + $(Q)touch $@ + +#----------------------------------------------------------------------------- +# Configuring the toolchain + +# 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. + +#-------------- +# Massage BR2_ARCH so that it matches CT-NG's ARCH +# 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 ($(BR2_powerpc),y) +CTNG_BIT := 32 +else ifeq ($(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 ($(BR2_<arch_name_here>),y) +# CTNG_ARCH := +# CTNG_ENDIAN := +# CTNG_BIT := +# - remove unneeded vars +# - add BR arch-name on ifeq line +# - fill-in required CTNG_* vars +endif + +#-------------- +# Massage BR options into CTNG .config file +# CT_ARCH : handled by the backend mechanism +# CT_ARCH_[BL]E : endianness +# CT_ARCH_(32|64) : bitness +# CT_PREFIX_DIR : install into BR's toolchain dir +# CT_INSTALL_DIR_RO : do *not* chmod a-w the toolchain dir +# CT_LOCAL_TARBALLS_DIR : share downloads with BR +# CT_SYSROOT_DIR_PREFIX : no prefix needed, really +# CT_TARGET_VENDOR : try to set a unique vendor string, to avoid clashing with BR's vendor string +# CT_TARGET_ALIAS : set the target tuple alias to REAL_GNU_TARGET_NAME so that packages' ./configure find the compiler +# CT_DEBUG_gdb : deselect gdb+gdbserver if buildroot builds its own +# CT_CC_LANG_CXX : required if we copy libstdc++.so, and build C++ +# CT_LIBC_UCLIBC_CONFIG_FILE: uClibc config file, if needed +# +# Lots of other awfull sed manipulations go here, to override CT-NG's .config +# with BR2 config options. +# Known missing: arch variant & options, floating point (HW/SW), uClibc/eglibc config... +# + +CTNG_FIX_DOT_CONFIG_SED := +CTNG_FIX_DOT_CONFIG_SED += s:^(CT_INSTALL_DIR_RO)=y:\# \1 is not set:; +CTNG_FIX_DOT_CONFIG_SED += s:^(|\# )(CT_ARCH_[BL]E).*:\# \2 is not set:; +CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_$(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_$(CTNG_BIT)) is not set:\1=y:; +CTNG_FIX_DOT_CONFIG_SED += s:^\# (CT_ARCH_USE_MMU) is not set:\1=y:; +CTNG_FIX_DOT_CONFIG_SED += s:^(CT_TARGET_VENDOR)=.*:\1="buildroot_ctng":; +CTNG_FIX_DOT_CONFIG_SED += s:^(CT_TARGET_ALIAS)=.*:\1="$(REAL_GNU_TARGET_NAME)":; +CTNG_FIX_DOT_CONFIG_SED += s:^(CT_CC_PKGVERSION)="(.*)":\1="crosstool-NG $(CTNG_VERSION) - buildroot $(call qstrip,$(BR2_VERSION))":; +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 +ifneq ($(call qstrip,$(BR2_INSTALL_LIBSTDCPP)),) +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 + +#-------------- +# And the specials for paths +CTNG_FIX_DOT_CONFIG_PATHS_SED := +CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_PREFIX_DIR)=.*:\1="$(TOOLCHAIN_DIR)":; +CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_LOCAL_TARBALLS_DIR)=.*:\1="$(DL_DIR)":; +CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_SYSROOT_DIR_PREFIX)=.*:\1="":; +ifeq ($(BR2_TOOLCHAIN_CTNG_uClibc),y) +CTNG_FIX_DOT_CONFIG_PATHS_SED += s:^(CT_LIBC_UCLIBC_CONFIG_FILE)=.*:\1="$(CTNG_UCLIBC_CONFIG_FILE)":; +endif + +#-------------- +# Small functions to shoe-horn the above into crosstool-NG's .config +# $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 + +# 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 + +# This function checks the confguration of the toolchain 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) $(1); \ + fi +endef + +# Default configuration +# Depends on top-level .config because it has options we have to shoe-horn +# into crosstool-NG's .config +# Only copy the original .config file if we don't have one already +$(CTNG_DIR)/.config: $(CTNG_CONFIG_FILE) $(CTNG_DIR)/ct-ng $(CONFIG_DIR)/.config + $(Q)[ -f $@ ] && cp -a $@ $@.timestamp || cp -f $< $@ + $(call ctng-oldconfig,$@) + $(call ctng-check-config-changed,$@,$@.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 $<.timestamp + +#----------------------------------------------------------------------------- +# Retrieving, configuring and building crosstool-NG (as a package) + +$(DL_DIR)/$(CTNG_SOURCE): + $(Q)$(call DOWNLOAD,$(CTNG_SITE),$(CTNG_SOURCE)) + +$(CTNG_DIR)/.unpacked: $(DL_DIR)/$(CTNG_SOURCE) + $(Q)rm -rf $(CTNG_DIR) + $(Q)mkdir -p $(BUILD_DIR) + $(Q)$(CTNG_CAT) $(DL_DIR)/$(CTNG_SOURCE) |tar -C $(BUILD_DIR) $(TAR_OPTIONS) - + $(Q)touch $@ + +$(CTNG_DIR)/.patched: $(CTNG_DIR)/.unpacked + $(Q)toolchain/patch-kernel.sh $(CTNG_DIR) \ + $(CTNG_PATCH_DIR) \ + \*.patch \ + \*.patch.$(ARCH) + $(Q)touch $@ + +$(CTNG_DIR)/.configured: $(CTNG_DIR)/.patched + $(Q)cd $(CTNG_DIR) && ./configure --local + $(Q)touch $@ + +$(CTNG_DIR)/ct-ng: $(CTNG_DIR)/.configured + $(Q)$(MAKE) -C $(CTNG_DIR) --no-print-directory + $(Q)touch $@ |