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crosstool-ng/scripts/build/libc/uClibc.sh
Alexey Neyman a20c29dcef Make libiconv an option in the menu config 
Signed-off-by: Alexey Neyman <stilor@att.net>
2018-02-10 14:51:45 -08:00

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# This file declares functions to install the uClibc C library
# Copyright 2007 Yann E. MORIN
# Licensed under the GPL v2. See COPYING in the root of this package
# Download uClibc
do_libc_get() {
CT_Fetch UCLIBC
}
# Extract uClibc
do_libc_extract() {
CT_ExtractPatch UCLIBC
}
# Build and install headers and start files
do_libc_start_files() {
# Start files and Headers should be configured the same way as the
# final libc, but built and installed differently.
do_libc_backend libc_mode=startfiles
}
# This function builds and install the full C library
do_libc() {
do_libc_backend libc_mode=final
}
# Common backend for 1st and 2nd passes.
do_libc_backend() {
local libc_mode
local arg
for arg in "$@"; do
eval "${arg// /\\ }"
done
case "${libc_mode}" in
startfiles) CT_DoStep INFO "Installing C library headers & start files";;
final) CT_DoStep INFO "Installing C library";;
*) CT_Abort "Unsupported (or unset) libc_mode='${libc_mode}'";;
esac
CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc-${libc_mode}"
CT_IterateMultilibs do_libc_backend_once multilib libc_mode="${libc_mode}"
CT_Popd
CT_EndStep
}
# Common backend for 1st and 2nd passes, once per multilib.
do_libc_backend_once() {
local libc_mode
local multi_dir multi_os_dir multi_root multi_flags multi_index multi_count
local multilib_dir startfiles_dir
local jflag=${CT_LIBC_UCLIBC_PARALLEL:+${JOBSFLAGS}}
local -a make_args
local extra_cflags f cfg_cflags cf
local hdr_install_subdir
local uclibc_name
for arg in "$@"; do
eval "${arg// /\\ }"
done
if [ "${CT_UCLIBC_USE_UCLIBC_NG_ORG}" = "y" ]; then
uclibc_name="uClibc-ng"
elif [ "${CT_UCLIBC_USE_UCLIBC_ORG}" = "y" ]; then
uclibc_name="uClibc"
fi
CT_DoStep INFO "Building for multilib ${multi_index}/${multi_count}: '${multi_flags}'"
multilib_dir="lib/${multi_os_dir}"
startfiles_dir="${multi_root}/usr/${multilib_dir}"
CT_SanitizeVarDir multilib_dir startfiles_dir
# Construct make arguments:
# - uClibc uses the CROSS environment variable as a prefix to the compiler
# tools to use. Since it requires core pass-1, thusly named compiler is
# already available.
# - Note about CFLAGS: In uClibc, CFLAGS are generated by Rules.mak,
# depending on the configuration of the library. That is, they are tailored
# to best fit the target. So it is useless and seems to be a bad thing to
# use LIBC_EXTRA_CFLAGS here.
# - We do _not_ want to strip anything for now, in case we specifically
# asked for a debug toolchain, thus the STRIPTOOL= assignment.
make_args=( CROSS_COMPILE="${CT_TARGET}-" \
HOSTCC="${CT_BUILD}-gcc" \
PREFIX="${multi_root}/" \
MULTILIB_DIR="${multilib_dir}" \
STRIPTOOL=true \
${CT_LIBC_UCLIBC_VERBOSITY} \
)
# Simply copy files until uClibc has the ability to build out-of-tree
CT_DoLog EXTRA "Copying sources to build dir"
CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/uClibc/." .
# Force the date of the pregen locale data, as the
# newer ones that are referenced are not available
CT_DoLog EXTRA "Applying configuration"
# Use the default config if the user did not provide one.
if [ -z "${CT_LIBC_UCLIBC_CONFIG_FILE}" ]; then
CT_LIBC_UCLIBC_CONFIG_FILE="${CT_LIB_DIR}/contrib/uClibc-defconfigs/${uclibc_name}.config"
fi
manage_uClibc_config "${CT_LIBC_UCLIBC_CONFIG_FILE}" .config "${multi_flags}"
CT_DoExecLog ALL make "${make_args[@]}" olddefconfig
# Now filter the multilib flags. manage_uClibc_config did the opposite of
# what Rules.mak in uClibc would do: by the multilib's CFLAGS, it determined
# the applicable configuration options. We don't want to pass the same options
# in the UCLIBC_EXTRA_CFLAGS again (on some targets, the options do not correctly
# override each other). On the other hand, we do not want to lose the options
# that are not reflected in the .config.
extra_cflags="-pipe"
{ echo "include Rules.mak"; echo "show-cpu-flags:"; printf '\t@echo $(CPU_CFLAGS)\n'; } \
> .show-cpu-cflags.mk
cfg_cflags=$( make "${make_args[@]}" \
--no-print-directory -f .show-cpu-cflags.mk show-cpu-flags )
CT_DoExecLog ALL rm -f .show-cpu-cflags.mk
CT_DoLog DEBUG "CPU_CFLAGS detected by uClibc: ${cfg_cflags[@]}"
for f in ${multi_flags}; do
for cf in ${cfg_cflags}; do
if [ "${f}" = "${cf}" ]; then
f=
break
fi
done
if [ -n "${f}" ]; then
extra_cflags+=" ${f}"
fi
done
CT_DoLog DEBUG "Filtered multilib CFLAGS: ${extra_cflags}"
make_args+=( UCLIBC_EXTRA_CFLAGS="${extra_cflags}" )
# uClibc does not have a way to select the installation subdirectory for headers,
# it is always $(DEVEL_PREFIX)/include. Also, we're reinstalling the headers
# at the final stage (see the note below), we may already have the subdirectory
# in /usr/include.
CT_DoArchUClibcHeaderDir hdr_install_subdir "${multi_flags}"
if [ -n "${hdr_install_subdir}" ]; then
CT_DoExecLog ALL cp -a "${multi_root}/usr/include" "${multi_root}/usr/include.saved"
fi
if [ "${libc_mode}" = "startfiles" ]; then
CT_DoLog EXTRA "Building headers"
CT_DoExecLog ALL make "${make_args[@]}" headers
# Ensure the directory for installing multilib-specific binaries exists.
CT_DoExecLog ALL mkdir -p "${startfiles_dir}"
CT_DoLog EXTRA "Installing headers"
CT_DoExecLog ALL make "${make_args[@]}" install_headers
# The check might look bogus, but it is the same condition as is used
# by GCC build script to enable/disable shared library support.
if [ "${CT_THREADS}" = "nptl" ]; then
CT_DoLog EXTRA "Building start files"
CT_DoExecLog ALL make ${jflag} "${make_args[@]}" \
lib/crt1.o lib/crti.o lib/crtn.o
# From: http://git.openembedded.org/cgit.cgi/openembedded/commit/?id=ad5668a7ac7e0436db92e55caaf3fdf782b6ba3b
# libm.so is needed for ppc, as libgcc is linked against libm.so
# No problem to create it for other archs.
CT_DoLog EXTRA "Building dummy shared libs"
CT_DoExecLog ALL "${CT_TARGET}-${CT_CC}" -nostdlib -nostartfiles \
-shared ${multi_flags} -x c /dev/null -o libdummy.so
CT_DoLog EXTRA "Installing start files"
CT_DoExecLog ALL install -m 0644 lib/crt1.o lib/crti.o lib/crtn.o \
"${startfiles_dir}"
CT_DoLog EXTRA "Installing dummy shared libs"
CT_DoExecLog ALL install -m 0755 libdummy.so "${startfiles_dir}/libc.so"
CT_DoExecLog ALL install -m 0755 libdummy.so "${startfiles_dir}/libm.so"
fi # CT_THREADS == nptl
fi # libc_mode == startfiles
if [ "${libc_mode}" = "final" ]; then
CT_DoLog EXTRA "Cleaning up startfiles"
CT_DoExecLog ALL rm -f "${startfiles_dir}/crt1.o" \
"${startfiles_dir}/crti.o" \
"${startfiles_dir}/crtn.o" \
"${startfiles_dir}/libc.so" \
"${startfiles_dir}/libm.so"
CT_DoLog EXTRA "Building C library"
CT_DoExecLog ALL make "${make_args[@]}" pregen
CT_DoExecLog ALL make ${jflag} "${make_args[@]}" all
# YEM-FIXME:
# - we want to install 'runtime' files, eg. lib*.{a,so*}, crti.o and
# such files, except the headers as they already are installed
# - "make install_dev" installs the headers, the crti.o... and the
# static libs, but not the dynamic libs
# - "make install_runtime" installs the dynamic libs only
# - "make install" calls install_runtime and install_dev
# - so we're left with re-installing the headers... Sigh...
CT_DoLog EXTRA "Installing C library"
CT_DoExecLog ALL make "${make_args[@]}" install install_utils
fi # libc_mode == final
# Now, if installing headers into a subdirectory, put everything in its place.
# Remove the header subdirectory if it existed already.
if [ -n "${hdr_install_subdir}" ]; then
CT_DoExecLog ALL mv "${multi_root}/usr/include" "${multi_root}/usr/include.new"
CT_DoExecLog ALL mv "${multi_root}/usr/include.saved" "${multi_root}/usr/include"
CT_DoExecLog ALL rm -rf "${multi_root}/usr/include/${hdr_install_subdir}"
CT_DoExecLog ALL mv "${multi_root}/usr/include.new" "${multi_root}/usr/include/${hdr_install_subdir}"
fi
CT_EndStep
}
# Initialises the .config file to sensible values
# $1: original file
# $2: modified file
manage_uClibc_config() {
src="$1"
dst="$2"
flags="$3"
# Start with fresh files
CT_DoExecLog ALL cp "${src}" "${dst}"
case "${CT_ARCH_ENDIAN}" in
big|big,little)
CT_KconfigDisableOption "ARCH_LITTLE_ENDIAN" "${dst}"
CT_KconfigDisableOption "ARCH_WANTS_LITTLE_ENDIAN" "${dst}"
CT_KconfigEnableOption "ARCH_BIG_ENDIAN" "${dst}"
CT_KconfigEnableOption "ARCH_WANTS_BIG_ENDIAN" "${dst}"
;;
little|little,big)
CT_KconfigDisableOption "ARCH_BIG_ENDIAN" "${dst}"
CT_KconfigDisableOption "ARCH_WANTS_BIG_ENDIAN" "${dst}"
CT_KconfigEnableOption "ARCH_LITTLE_ENDIAN" "${dst}"
CT_KconfigEnableOption "ARCH_WANTS_LITTLE_ENDIAN" "${dst}"
;;
esac
if [ "${CT_ARCH_USE_MMU}" = "y" ]; then
CT_KconfigEnableOption "ARCH_USE_MMU" "${dst}"
else
CT_KconfigDisableOption "ARCH_USE_MMU" "${dst}"
fi
if [ "${CT_SHARED_LIBS}" = "y" ]; then
CT_KconfigEnableOption "HAVE_SHARED" "${dst}"
else
CT_KconfigDisableOption "HAVE_SHARED" "${dst}"
fi
# Accomodate for old and new uClibc version, where the
# way to select between hard/soft float has changed
case "${CT_ARCH_FLOAT}" in
hard|softfp)
CT_KconfigEnableOption "UCLIBC_HAS_FPU" "${dst}"
CT_KconfigEnableOption "UCLIBC_HAS_FLOATS" "${dst}"
;;
soft)
CT_KconfigDisableOption "UCLIBC_HAS_FPU" "${dst}"
CT_KconfigEnableOption "UCLIBC_HAS_FLOATS" "${dst}"
CT_KconfigEnableOption "DO_C99_MATH" "${dst}"
;;
esac
if [ "${CT_LIBC_UCLIBC_FENV}" = "y" ]; then
CT_KconfigEnableOption "UCLIBC_HAS_FENV" "${dst}"
else
CT_KconfigDisableOption "UCLIBC_HAS_FENV" "${dst}"
fi
if [ "${CT_LIBC_UCLIBC_RPC}" = "y" ]; then
CT_KconfigEnableOption "UCLIBC_HAS_RPC" "${dst}"
else
CT_KconfigDisableOption "UCLIBC_HAS_RPC" "${dst}"
fi
# We always want ctor/dtor
CT_KconfigEnableOption "UCLIBC_CTOR_DTOR" "${dst}"
# Change paths to work with crosstool-NG
#
# DEVEL_PREFIX is left as '/usr/' because it is post-pended to $PREFIX,
# which is the correct value of ${PREFIX}/${TARGET}.
CT_KconfigSetOption "DEVEL_PREFIX" "\"/usr/\"" "${dst}"
CT_KconfigSetOption "RUNTIME_PREFIX" "\"/\"" "${dst}"
CT_KconfigSetOption "KERNEL_HEADERS" "\"${CT_HEADERS_DIR}\"" "${dst}"
# Locales support
# Note that the two PREGEN_LOCALE and the XLOCALE lines may be missing
# entirely if LOCALE is not set. If LOCALE was already set, we'll
# assume the user has already made all the appropriate generation
# arrangements. Note that having the uClibc Makefile download the
# pregenerated locales is not compatible with crosstool.
if [ -z "${CT_LIBC_UCLIBC_LOCALES}" ]; then
CT_KconfigDisableOption "UCLIBC_HAS_LOCALE" "${dst}"
else
CT_KconfigEnableOption "UCLIBC_HAS_LOCALE" "${dst}"
CT_KconfigDeleteOption "UCLIBC_PREGENERATED_LOCALE_DATA" "${dst}"
CT_KconfigDeleteOption "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA" "${dst}"
CT_KconfigDeleteOption "UCLIBC_HAS_XLOCALE" "${dst}"
fi
# WCHAR support
if [ "${CT_LIBC_UCLIBC_WCHAR}" = "y" ]; then
CT_KconfigEnableOption "UCLIBC_HAS_WCHAR" "${dst}"
else
CT_KconfigDisableOption "UCLIBC_HAS_WCHAR" "${dst}"
fi
# IPv6 support
if [ "${CT_LIBC_UCLIBC_IPV6}" = "y" ]; then
CT_KconfigEnableOption "UCLIBC_HAS_IPV6" "${dst}"
else
CT_KconfigDisableOption "UCLIBC_HAS_IPV6" "${dst}"
fi
# Iconv support
if [ "${CT_LIBC_UCLIBC_LIBICONV}" = "y" ]; then
CT_KconfigEnableOption "UCLIBC_HAS_LIBICONV" "${dst}"
else
CT_KconfigDisableOption "UCLIBC_HAS_LIBICONV" "${dst}"
fi
# Force on options needed for C++ if we'll be making a C++ compiler.
# I'm not sure locales are a requirement for doing C++... Are they?
if [ "${CT_CC_LANG_CXX}" = "y" ]; then
CT_KconfigEnableOption "DO_C99_MATH" "${dst}"
CT_KconfigEnableOption "UCLIBC_HAS_GNU_GETOPT" "${dst}"
fi
# Stack Smash Protection (SSP)
if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then
CT_KconfigEnableOption "UCLIBC_HAS_SSP" "${dst}"
CT_KconfigEnableOption "UCLIBC_BUILD_SSP" "${dst}"
else
CT_KconfigDisableOption "UCLIBC_HAS_SSP" "${dst}"
CT_KconfigDisableOption "UCLIBC_BUILD_SSP" "${dst}"
fi
# Push the threading model
CT_KconfigDisableOption "UCLIBC_HAS_THREADS" "${dst}"
CT_KconfigDisableOption "LINUXTHREADS_OLD" "${dst}"
CT_KconfigDisableOption "LINUXTHREADS_NEW" "${dst}"
CT_KconfigDisableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}"
case "${CT_THREADS}:${CT_LIBC_UCLIBC_LNXTHRD}" in
none:)
;;
linuxthreads:)
# Newer version of uClibc-ng, no old/new dichotomy
CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}"
CT_KconfigEnableOption "UCLIBC_HAS_LINUXTHREADS" "${dst}"
;;
linuxthreads:old)
CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}"
CT_KconfigEnableOption "LINUXTHREADS_OLD" "${dst}"
;;
linuxthreads:new)
CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}"
CT_KconfigEnableOption "LINUXTHREADS_NEW" "${dst}"
;;
nptl:)
CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}"
CT_KconfigEnableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}"
;;
*)
CT_Abort "Incorrect thread settings: CT_THREADS='${CT_THREAD}' CT_LIBC_UCLIBC_LNXTHRD='${CT_LIBC_UCLIBC_LNXTHRD}'"
;;
esac
# Always build the libpthread_db
CT_KconfigEnableOption "PTHREADS_DEBUG_SUPPORT" "${dst}"
# Force on debug options if asked for
CT_KconfigDisableOption "DODEBUG" "${dst}"
CT_KconfigDisableOption "DODEBUG_PT" "${dst}"
CT_KconfigDisableOption "DOASSERTS" "${dst}"
CT_KconfigDisableOption "SUPPORT_LD_DEBUG" "${dst}"
CT_KconfigDisableOption "SUPPORT_LD_DEBUG_EARLY" "${dst}"
CT_KconfigDisableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}"
case "${CT_LIBC_UCLIBC_DEBUG_LEVEL}" in
0)
;;
1)
CT_KconfigEnableOption "DODEBUG" "${dst}"
;;
2)
CT_KconfigEnableOption "DODEBUG" "${dst}"
CT_KconfigEnableOption "DOASSERTS" "${dst}"
CT_KconfigEnableOption "SUPPORT_LD_DEBUG" "${dst}"
CT_KconfigEnableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}"
;;
3)
CT_KconfigEnableOption "DODEBUG" "${dst}"
CT_KconfigEnableOption "DODEBUG_PT" "${dst}"
CT_KconfigEnableOption "DOASSERTS" "${dst}"
CT_KconfigEnableOption "SUPPORT_LD_DEBUG" "${dst}"
CT_KconfigEnableOption "SUPPORT_LD_DEBUG_EARLY" "${dst}"
CT_KconfigEnableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}"
;;
esac
# Remove stripping: its the responsibility of the
# firmware builder to strip or not.
CT_KconfigDisableOption "DOSTRIP" "${dst}"
# Now allow architecture to tweak as it wants
CT_DoArchUClibcConfig "${dst}"
CT_DoArchUClibcCflags "${dst}" "${flags}"
}
do_libc_post_cc() {
# uClibc and GCC disagree where the dynamic linker lives. uClibc always
# places it in the MULTILIB_DIR, while gcc does that for *some* variants
# and expects it in /lib for the other. So, create a symlink from lib
# to the actual location, but only if that will not override the actual
# file in /lib. Thus, need to do this after all the variants are built.
# Moreover, need to do this after the final compiler is built: on targets
# that use elf2flt, the core compilers cannot find ld when running elf2flt.
CT_MultilibFixupLDSO
}
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