diff options
Diffstat (limited to 'toolchain/external-toolchain/ext-tool.mk')
| -rw-r--r-- | toolchain/external-toolchain/ext-tool.mk | 207 |
1 files changed, 158 insertions, 49 deletions
diff --git a/toolchain/external-toolchain/ext-tool.mk b/toolchain/external-toolchain/ext-tool.mk index b904775f4..d441a9252 100644 --- a/toolchain/external-toolchain/ext-tool.mk +++ b/toolchain/external-toolchain/ext-tool.mk @@ -1,24 +1,52 @@ # -# copy_toolchain_lib_root +# This file implements the support for external toolchains, i.e +# toolchains that have not been produced by Buildroot itself and that +# are already available on the system on which Buildroot runs. # -# $1: source -# $2: destination -# $3: strip (y|n) default is to strip +# The basic principle is the following +# +# 1. Perform some checks on the conformity between the toolchain +# configuration described in the Buildroot menuconfig system, and the +# real configuration of the external toolchain. This is for example +# important to make sure that the Buildroot configuration system +# knows whether the toolchain supports RPC, IPv6, locales, large +# files, etc. Unfortunately, these things cannot be detected +# automatically, since the value of these options (such as +# BR2_INET_RPC) are needed at configuration time because these +# options are used as dependencies for other options. And at +# configuration time, we are not able to retrieve the external +# toolchain configuration. +# +# 2. Copy the libraries needed at runtime to the target directory, +# $(TARGET_DIR). Obviously, things such as the C library, the dynamic +# loader and a few other utility libraries are needed if dynamic +# applications are to be executed on the target system. +# +# 3. Copy the libraries and headers to the staging directory. This +# will allow all further calls to gcc to be made using --sysroot +# $(STAGING_DIR), which greatly simplifies the compilation of the +# packages when using external toolchains. So in the end, only the +# cross-compiler binaries remains external, all libraries and headers +# are imported into the Buildroot tree. + +# +# Copy a toolchain library and its symbolic links from the sysroot +# directory to the target directory. Also optionaly strips the +# library. +# +# $1: sysroot directory +# $2: library name +# $3: destination directory +# $4: strip (y|n), default is to strip # copy_toolchain_lib_root = \ - LIB="$(strip $1)"; \ - DST="$(strip $2)"; \ - STRIP="$(strip $3)"; \ - \ - LIB_DIR=`$(TARGET_CC) -print-file-name=$${LIB} | sed -e "s,$${LIB}\$$,,"`; \ - \ - if test -z "$${LIB_DIR}"; then \ - echo "copy_toolchain_lib_root: lib=$${LIB} not found"; \ - exit -1; \ - fi; \ + SYSROOT_DIR="$(strip $1)"; \ + LIB="$(strip $2)"; \ + DST="$(strip $3)"; \ + STRIP="$(strip $4)"; \ \ - LIB="$(strip $1)"; \ - for FILE in `find $${LIB_DIR} -maxdepth 1 -type l -name "$${LIB}*"`; do \ + LIB_DIR="$${SYSROOT_DIR}/lib" ; \ + for FILE in `find $${LIB_DIR} -maxdepth 1 -name "$${LIB}.*"`; do \ LIB=`basename $${FILE}`; \ while test \! -z "$${LIB}"; do \ rm -fr $(TARGET_DIR)$${DST}/$${LIB}; \ @@ -43,44 +71,62 @@ copy_toolchain_lib_root = \ \ echo -n +# +# Copy the full external toolchain sysroot directory to the staging +# dir +# +# $1: sysroot directory +# copy_toolchain_sysroot = \ - SYSROOT_DIR=`$(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=`; \ - if [ -n "$${SYSROOT_DIR}" ]; then cp -a $${SYSROOT_DIR}/* $(STAGING_DIR)/ ; \ - find $(STAGING_DIR) -type d | xargs chmod 755; fi + SYSROOT_DIR="$(strip $1)"; \ + cp -a $${SYSROOT_DIR}/* $(STAGING_DIR)/ ; \ + find $(STAGING_DIR) -type d | xargs chmod 755 -ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y) -EXTERNAL_LIBC=libc.so.0 -EXTERNAL_LIBS=ld-uClibc.so.0 libcrypt.so.0 libdl.so.0 libgcc_s.so libm.so.0 libnsl.so.0 libpthread.so.0 libresolv.so.0 librt.so.0 libutil.so.0 -else -EXTERNAL_LIBC=libc.so.6 -EXTERNAL_LIBS=ld-linux.so.3 libcrypt.so.1 libdl.so.2 libgcc_s.so.1 libm.so.6 libnsl.so.1 libpthread.so.0 libresolv.so.2 librt.so.1 libutil.so.1 libnss_files.so.2 -endif - -check_clibrary = \ - if ! test -f `$(TARGET_CC) -print-file-name=$(EXTERNAL_LIBC)` ; then \ - echo "Incorrect selection of the C library"; \ - exit -1; \ - fi - -# 1: Buildroot option name -# 2: message +# +# Check the availability of a particular glibc feature. We assume that +# all Buildroot toolchain options are supported by glibc, so we just +# check that they are enabled. +# +# $1: Buildroot option name +# $2: feature description +# check_glibc_feature = \ if [ x$($(1)) != x"y" ] ; then \ echo "$(2) available in C library, please enable $(1)" ; \ exit 1 ; \ fi +# +# Check the correctness of a glibc external toolchain configuration. +# 1. Check that the C library selected in Buildroot matches the one +# of the external toolchain +# 2. Check that all the C library-related features are enabled in the +# config, since glibc always supports all of them +# +# $1: sysroot directory +# check_glibc = \ + SYSROOT_DIR="$(strip $1)"; \ + if ! test -f $${SYSROOT_DIR}/lib/ld-linux.so.* ; then \ + echo "Incorrect selection of the C library"; \ + exit -1; \ + fi; \ $(call check_glibc_feature,BR2_LARGEFILE,Large file support) ;\ $(call check_glibc_feature,BR2_INET_IPV6,IPv6 support) ;\ $(call check_glibc_feature,BR2_INET_RPC,RPC support) ;\ $(call check_glibc_feature,BR2_ENABLE_LOCALE,Locale support) ;\ $(call check_glibc_feature,BR2_USE_WCHAR,Wide char support) -# 1: uClibc macro name -# 2: Buildroot option name -# 3: uClibc config file -# 4: message +# +# Check the conformity of Buildroot configuration with regard to the +# uClibc configuration of the external toolchain, for a particular +# feature. +# +# $1: uClibc macro name +# $2: Buildroot option name +# $3: uClibc config file +# $4: feature description +# check_uclibc_feature = \ IS_IN_LIBC=`grep -q "\#define $(1) 1" $(3) && echo y` ; \ if [ x$($(2)) != x"y" -a x$${IS_IN_LIBC} == x"y" ] ; then \ @@ -92,8 +138,22 @@ check_uclibc_feature = \ exit 1 ; \ fi +# +# Check the correctness of a uclibc external toolchain configuration +# 1. Check that the C library selected in Buildroot matches the one +# of the external toolchain +# 2. Check that the features enabled in the Buildroot configuration +# match the features available in the uClibc of the external +# toolchain +# +# $1: sysroot directory +# check_uclibc = \ - SYSROOT_DIR=`$(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=`; \ + SYSROOT_DIR="$(strip $1)"; \ + if ! test -f $${SYSROOT_DIR}/lib/ld-uClibc.so.* ; then \ + echo "Incorrect selection of the C library"; \ + exit -1; \ + fi; \ UCLIBC_CONFIG_FILE=$${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; \ $(call check_uclibc_feature,__UCLIBC_HAS_LFS__,BR2_LARGEFILE,$${UCLIBC_CONFIG_FILE},Large file support) ;\ $(call check_uclibc_feature,__UCLIBC_HAS_IPV6__,BR2_INET_IPV6,$${UCLIBC_CONFIG_FILE},IPv6 support) ;\ @@ -101,21 +161,70 @@ check_uclibc = \ $(call check_uclibc_feature,__UCLIBC_HAS_LOCALE__,BR2_ENABLE_LOCALE,$${UCLIBC_CONFIG_FILE},Locale support) ;\ $(call check_uclibc_feature,__UCLIBC_HAS_WCHAR__,BR2_USE_WCHAR,$${UCLIBC_CONFIG_FILE},Wide char support) ;\ -uclibc: dependencies $(TARGET_DIR)/lib/$(EXTERNAL_LIBC) +# +# Check that the Buildroot configuration of the ABI matches the +# configuration of the external toolchain. +# +check_arm_abi = \ + EXT_TOOLCHAIN_TARGET=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Target | cut -f2 -d ' ') ; \ + if echo $${EXT_TOOLCHAIN_TARGET} | grep -q 'eabi$$' ; then \ + EXT_TOOLCHAIN_ABI="eabi" ; \ + else \ + EXT_TOOLCHAIN_ABI="oabi" ; \ + fi ; \ + if [ x$(BR2_ARM_OABI) == x"y" -a $${EXT_TOOLCHAIN_ABI} == "eabi" ] ; then \ + echo "Incorrect ABI setting" ; \ + exit 1 ; \ + fi ; \ + if [ x$(BR2_ARM_EABI) == x"y" -a $${EXT_TOOLCHAIN_ABI} == "oabi" ] ; then \ + echo "Incorrect ABI setting" ; \ + exit 1 ; \ + fi ; \ + +# +# Check that the cross-compiler given in the configuration exists +# +check_cross_compiler_exists = \ + if ! test -x $(TARGET_CC) ; then \ + echo "Cannot find cross-compiler $(TARGET_CC)" ; \ + exit 1 ; \ + fi ; \ + +uclibc: dependencies $(STAMP_DIR)/ext-toolchain-installed -$(TARGET_DIR)/lib/$(EXTERNAL_LIBC): +EXTERNAL_LIBS=libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libpthread.so libresolv.so librt.so libutil.so +ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y) +EXTERNAL_LIBS+=ld-uClibc.so +else +EXTERNAL_LIBS+=ld-linux.so libnss_files.so +endif + +ifeq ($(BR2_INSTALL_LIBSTDCPP),y) +EXTERNAL_LIBS+=libstdc++.so +endif + +SYSROOT_DIR=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=) + +$(STAMP_DIR)/ext-toolchain-installed: @echo "Checking external toolchain settings" - @$(call check_clibrary) + $(Q)$(call check_cross_compiler_exists) +ifeq ($(strip $(SYSROOT_DIR)),) + @echo "External toolchain doesn't support --sysroot. Cannot use." + exit 1 +endif +ifeq ($(BR2_arm),y) + $(Q)$(call check_arm_abi) +endif ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y) - @$(call check_uclibc) + $(Q)$(call check_uclibc,$(SYSROOT_DIR)) else - @$(call check_glibc) + $(Q)$(call check_glibc,$(SYSROOT_DIR)) endif mkdir -p $(TARGET_DIR)/lib @echo "Copy external toolchain libraries to target..." - @$(call copy_toolchain_lib_root, $(EXTERNAL_LIBC), /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP)) - @for libs in $(EXTERNAL_LIBS); do \ - $(call copy_toolchain_lib_root, $$libs, /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \ + $(Q)for libs in $(EXTERNAL_LIBS); do \ + $(call copy_toolchain_lib_root,$(SYSROOT_DIR),$$libs,/lib,$(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \ done @echo "Copy external toolchain sysroot to staging..." - @$(call copy_toolchain_sysroot) + $(Q)$(call copy_toolchain_sysroot,$(SYSROOT_DIR)) + @touch $@ |