# This Makefile fragment declares helper functions, usefull to handle
# non- buildroot-built toolchains, eg. purely external toolchains or
# toolchains (internally) built using crosstool-NG.
#
# Copy a toolchain library and its symbolic links from the sysroot
# directory to the target directory. Also optionaly strips the
# library.
#
# Most toolchains (CodeSourcery ones) have their libraries either in
# /lib or /usr/lib relative to their ARCH_SYSROOT_DIR, so we search
# libraries in:
#
# $${ARCH_LIB_DIR}
# usr/$${ARCH_LIB_DIR}
#
# Buildroot toolchains, however, have basic libraries in /lib, and
# libstdc++/libgcc_s in /usr/<target-name>/lib(64), so we also need to
# search libraries in:
#
# usr/$(TOOLCHAIN_EXTERNAL_PREFIX)/$${ARCH_LIB_DIR}
#
# Linaro toolchains have most libraries in lib/<target-name>/, so we
# need to search libraries in:
#
# $${ARCH_LIB_DIR}/$(TOOLCHAIN_EXTERNAL_PREFIX)
#
# And recent Linaro toolchains have the GCC support libraries
# (libstdc++, libgcc_s, etc.) into a separate directory, outside of
# the sysroot, that we called the "SUPPORT_LIB_DIR", into which we
# need to search as well.
#
# Thanks to ARCH_LIB_DIR we also take into account toolchains that
# have the libraries in lib64 and usr/lib64.
#
# Please be very careful to check the major toolchain sources:
# Buildroot, Crosstool-NG, CodeSourcery and Linaro before doing any
# modification on the below logic.
#
# $1: arch specific sysroot directory
# $2: support libraries directory (can be empty)
# $3: library directory ('lib' or 'lib64') from which libraries must be copied
# $4: library name
# $5: destination directory of the libary, relative to $(TARGET_DIR)
#
copy_toolchain_lib_root = \
ARCH_SYSROOT_DIR="$(strip $1)"; \
SUPPORT_LIB_DIR="$(strip $2)" ; \
ARCH_LIB_DIR="$(strip $3)" ; \
LIB="$(strip $4)"; \
DESTDIR="$(strip $5)" ; \
\
for dir in \
$${ARCH_SYSROOT_DIR}/$${ARCH_LIB_DIR}/$(TOOLCHAIN_EXTERNAL_PREFIX) \
$${ARCH_SYSROOT_DIR}/usr/$(TOOLCHAIN_EXTERNAL_PREFIX)/$${ARCH_LIB_DIR} \
$${ARCH_SYSROOT_DIR}/$${ARCH_LIB_DIR} \
$${ARCH_SYSROOT_DIR}/usr/$${ARCH_LIB_DIR} \
$${SUPPORT_LIB_DIR} ; do \
LIBSPATH=`find $${dir} -maxdepth 1 -name "$${LIB}.*" 2>/dev/null` ; \
if test -n "$${LIBSPATH}" ; then \
break ; \
fi \
done ; \
for LIBPATH in $${LIBSPATH} ; do \
LIBNAME=`basename $${LIBPATH}`; \
LIBDIR=`dirname $${LIBPATH}` ; \
while test \! -z "$${LIBNAME}" ; do \
LIBPATH=$${LIBDIR}/$${LIBNAME} ; \
rm -fr $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
mkdir -p $(TARGET_DIR)/$${DESTDIR}; \
if test -h $${LIBPATH} ; then \
cp -d $${LIBPATH} $(TARGET_DIR)/$${DESTDIR}/; \
elif test -f $${LIBPATH}; then \
$(INSTALL) -D -m0755 $${LIBPATH} $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
else \
exit -1; \
fi; \
LIBNAME="`readlink $${LIBPATH}`"; \
done; \
done; \
\
echo -n
#
# Copy the full external toolchain sysroot directory to the staging
# dir. The operation of this function is rendered a little bit
# complicated by the support for multilib toolchains.
#
# We start by copying etc, lib, sbin and usr from the sysroot of the
# selected architecture variant (as pointed by ARCH_SYSROOT_DIR). This
# allows to import into the staging directory the C library and
# companion libraries for the correct architecture variant. We
# explictly only copy etc, lib, sbin and usr since other directories
# might exist for other architecture variants (on Codesourcery
# toolchain, the sysroot for the default architecture variant contains
# the armv4t and thumb2 subdirectories, which are the sysroot for the
# corresponding architecture variants), and we don't want to import
# them.
#
# Then, if the selected architecture variant is not the default one
# (i.e, if SYSROOT_DIR != ARCH_SYSROOT_DIR), then we :
#
# * Import the header files from the default architecture
# variant. Header files are typically shared between the sysroots
# for the different architecture variants. If we use the
# non-default one, header files were not copied by the previous
# step, so we copy them here from the sysroot of the default
# architecture variant.
#
# * Create a symbolic link that matches the name of the subdirectory
# for the architecture variant in the original sysroot. This is
# required as the compiler will by default look in
# sysroot_dir/arch_variant/ for libraries and headers, when the
# non-default architecture variant is used. Without this, the
# compiler fails to find libraries and headers.
#
# Some toolchains (i.e Linaro binary toolchains) store support
# libraries (libstdc++, libgcc_s) outside of the sysroot, so we simply
# copy all the libraries from the "support lib directory" into our
# sysroot.
#
# Note that the 'locale' directories are not copied. They are huge
# (400+MB) in CodeSourcery toolchains, and they are not really useful.
#
# $1: main sysroot directory of the toolchain
# $2: arch specific sysroot directory of the toolchain
# $3: arch specific subdirectory in the sysroot
# $4: directory of libraries ('lib' or 'lib64')
# $5: support lib directories (for toolchains storing libgcc_s,
# libstdc++ and other gcc support libraries outside of the
# sysroot)
copy_toolchain_sysroot = \
SYSROOT_DIR="$(strip $1)"; \
ARCH_SYSROOT_DIR="$(strip $2)"; \
ARCH_SUBDIR="$(strip $3)"; \
ARCH_LIB_DIR="$(strip $4)" ; \
SUPPORT_LIB_DIR="$(strip $5)" ; \
for i in etc $${ARCH_LIB_DIR} sbin usr ; do \
if [ -d $${ARCH_SYSROOT_DIR}/$$i ] ; then \
rsync -au --chmod=Du+w --exclude 'usr/lib/locale' $${ARCH_SYSROOT_DIR}/$$i $(STAGING_DIR)/ ; \
fi ; \
done ; \
if [ `readlink -f $${SYSROOT_DIR}` != `readlink -f $${ARCH_SYSROOT_DIR}` ] ; then \
if [ ! -d $${ARCH_SYSROOT_DIR}/usr/include ] ; then \
cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
fi ; \
mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \
relpath="./" ; \
nbslashs=`echo -n $${ARCH_SUBDIR} | sed 's%[^/]%%g' | wc -c` ; \
for slash in `seq 1 $${nbslashs}` ; do \
relpath=$${relpath}"../" ; \
done ; \
ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \
echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \
fi ; \
if test -n "$${SUPPORT_LIB_DIR}" ; then \
cp -a $${SUPPORT_LIB_DIR}/* $(STAGING_DIR)/lib/ ; \
fi ; \
find $(STAGING_DIR) -type d | xargs chmod 755
#
# Create lib64 -> lib and usr/lib64 -> usr/lib symbolic links in the
# target and staging directories. This is needed for some 64 bits
# toolchains such as the Crosstool-NG toolchains, for which the path
# to the dynamic loader and other libraries is /lib64, but the
# libraries are stored in /lib.
#
create_lib64_symlinks = \
(cd $(TARGET_DIR) ; ln -s lib lib64) ; \
(cd $(TARGET_DIR)/usr ; ln -s lib lib64) ; \
(cd $(STAGING_DIR) ; ln -s lib lib64) ; \
(cd $(STAGING_DIR)/usr ; ln -s lib lib64)
#
# 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 $${SYSROOT_DIR}/lib/ld-linux*.so.* -o -f $${SYSROOT_DIR}/lib/ld.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_MMU,MMU support) ;\
$(call check_glibc_feature,BR2_USE_WCHAR,Wide char support)
#
# 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$${IS_IN_LIBC} = x"y" ] ; then \
echo "$(4) available in C library, please enable $(2)" ; \
exit 1 ; \
fi ; \
if [ x$($(2)) = x"y" -a x$${IS_IN_LIBC} != x"y" ] ; then \
echo "$(4) not available in C library, please disable $(2)" ; \
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
#
# $1: sysroot directory
#
check_uclibc = \
SYSROOT_DIR="$(strip $1)"; \
if ! test -f $${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; then \
echo "Incorrect selection of the C library"; \
exit -1; \
fi; \
UCLIBC_CONFIG_FILE=$${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; \
$(call check_uclibc_feature,__ARCH_USE_MMU__,BR2_USE_MMU,$${UCLIBC_CONFIG_FILE},MMU support) ;\
$(call check_uclibc_feature,__UCLIBC_HAS_LFS__,BR2_LARGEFILE,$${UCLIBC_CONFIG_FILE},Large file support) ;\
$(call check_uclibc_feature,__UCLIBC_HAS_IPV6__,BR2_INET_IPV6,$${UCLIBC_CONFIG_FILE},IPv6 support) ;\
$(call check_uclibc_feature,__UCLIBC_HAS_RPC__,BR2_INET_RPC,$${UCLIBC_CONFIG_FILE},RPC support) ;\
$(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) ;\
$(call check_uclibc_feature,__UCLIBC_HAS_THREADS__,BR2_TOOLCHAIN_HAS_THREADS,$${UCLIBC_CONFIG_FILE},Thread support) ;\
$(call check_uclibc_feature,__PTHREADS_DEBUG_SUPPORT__,BR2_TOOLCHAIN_HAS_THREADS_DEBUG,$${UCLIBC_CONFIG_FILE},Thread debugging support)
#
# Check that the Buildroot configuration of the ABI matches the
# configuration of the external toolchain.
#
# $1: cross-gcc path
#
check_arm_abi = \
__CROSS_CC=$(strip $1) ; \
EXT_TOOLCHAIN_TARGET=`LANG=C $${__CROSS_CC} -v 2>&1 | grep ^Target | cut -f2 -d ' '` ; \
if echo $${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 $${EXT_TOOLCHAIN_ABI} = "oabi" ] ; then \
echo "Incorrect ABI setting" ; \
exit 1 ; \
fi
#
# Check that the external toolchain supports C++
#
# $1: cross-g++ path
#
check_cplusplus = \
__CROSS_CXX=$(strip $1) ; \
$${__CROSS_CXX} -v > /dev/null 2>&1 ; \
if test $$? -ne 0 ; then \
echo "C++ support is selected but is not available in external toolchain" ; \
exit 1 ; \
fi
#
# Check that the cross-compiler given in the configuration exists
#
# $1: cross-gcc path
#
check_cross_compiler_exists = \
__CROSS_CC=$(strip $1) ; \
$${__CROSS_CC} -v > /dev/null 2>&1 ; \
if test $$? -ne 0 ; then \
echo "Cannot execute cross-compiler '$${__CROSS_CC}'" ; \
exit 1 ; \
fi
