341 lines
14 KiB
Bash
341 lines
14 KiB
Bash
# This file declares functions to install the uClibc C library
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# Copyright 2007 Yann E. MORIN
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# Licensed under the GPL v2. See COPYING in the root of this package
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# This function builds and install the full C library
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uClibc_ng_main()
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{
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CT_DoStep INFO "Installing C library"
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CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc"
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CT_IterateMultilibs uClibc_ng_backend_once multilib
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CT_Popd
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CT_EndStep
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}
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# Common backend for 1st and 2nd passes, once per multilib.
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uClibc_ng_backend_once()
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{
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local multi_dir multi_os_dir multi_root multi_flags multi_index multi_count
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local multilib_dir startfiles_dir
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local jflag=${CT_JOBSFLAGS}
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local -a make_args
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local extra_cflags f cfg_cflags cf
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local hdr_install_subdir
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for arg in "$@"; do
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eval "${arg// /\\ }"
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done
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CT_DoStep INFO "Building for multilib ${multi_index}/${multi_count}: '${multi_flags}'"
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multilib_dir="lib/${multi_os_dir}"
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startfiles_dir="${multi_root}/usr/${multilib_dir}"
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CT_SanitizeVarDir multilib_dir startfiles_dir
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# Construct make arguments:
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# - uClibc uses the CROSS environment variable as a prefix to the compiler
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# tools to use. Since it requires core compiler, thusly named compiler is
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# already available.
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# - Note about CFLAGS: In uClibc, CFLAGS are generated by Rules.mak,
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# depending on the configuration of the library. That is, they are tailored
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# to best fit the target. So it is useless and seems to be a bad thing to
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# use LIBC_EXTRA_CFLAGS here.
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# - We do _not_ want to strip anything for now, in case we specifically
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# asked for a debug toolchain, thus the STRIPTOOL= assignment.
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make_args=( CROSS_COMPILE="${CT_TARGET}-" \
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HOSTCC="${CT_BUILD}-gcc" \
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PREFIX="${multi_root}/" \
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MULTILIB_DIR="${multilib_dir}" \
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STRIPTOOL=true \
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${CT_LIBC_UCLIBC_VERBOSITY} \
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)
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# Simply copy files until uClibc has the ability to build out-of-tree
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CT_DoLog EXTRA "Copying sources to build dir"
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CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/uClibc-ng/." .
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# Force the date of the pregen locale data, as the
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# newer ones that are referenced are not available
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CT_DoLog EXTRA "Applying configuration"
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# Use the default config if the user did not provide one.
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if [ -z "${CT_LIBC_UCLIBC_CONFIG_FILE}" ]; then
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CT_LIBC_UCLIBC_CONFIG_FILE="${CT_LIB_DIR}/packages/uClibc-ng/config"
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fi
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manage_uClibc_config "${CT_LIBC_UCLIBC_CONFIG_FILE}" .config "${multi_flags}"
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CT_DoExecLog ALL make "${make_args[@]}" olddefconfig
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# Now filter the multilib flags. manage_uClibc_config did the opposite of
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# what Rules.mak in uClibc would do: by the multilib's CFLAGS, it determined
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# the applicable configuration options. We don't want to pass the same options
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# in the UCLIBC_EXTRA_CFLAGS again (on some targets, the options do not correctly
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# override each other). On the other hand, we do not want to lose the options
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# that are not reflected in the .config.
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extra_cflags="-pipe"
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{ echo "include Rules.mak"; echo "show-cpu-flags:"; printf '\t@echo $(CPU_CFLAGS)\n'; } \
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> .show-cpu-cflags.mk
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cfg_cflags=$( make "${make_args[@]}" \
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--no-print-directory -f .show-cpu-cflags.mk show-cpu-flags )
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CT_DoExecLog ALL rm -f .show-cpu-cflags.mk
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CT_DoLog DEBUG "CPU_CFLAGS detected by uClibc: ${cfg_cflags[@]}"
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for f in ${multi_flags}; do
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for cf in ${cfg_cflags}; do
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if [ "${f}" = "${cf}" ]; then
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f=
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break
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fi
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done
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if [ -n "${f}" ]; then
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extra_cflags+=" ${f}"
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fi
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done
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CT_DoLog DEBUG "Filtered multilib CFLAGS: ${extra_cflags}"
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make_args+=( UCLIBC_EXTRA_CFLAGS="${extra_cflags}" )
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# uClibc does not have a way to select the installation subdirectory for headers,
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# it is always $(DEVEL_PREFIX)/include. Also, we're reinstalling the headers
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# at the final stage (see the note below), we may already have the subdirectory
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# in /usr/include.
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CT_DoArchUClibcHeaderDir hdr_install_subdir "${multi_flags}"
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if [ -n "${hdr_install_subdir}" ]; then
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CT_DoExecLog ALL cp -a "${multi_root}/usr/include" "${multi_root}/usr/include.saved"
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fi
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CT_DoLog EXTRA "Building C library"
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CT_DoExecLog ALL make "${make_args[@]}" pregen
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CT_DoExecLog ALL make ${jflag} "${make_args[@]}" all
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CT_DoLog EXTRA "Installing C library"
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CT_DoExecLog ALL make "${make_args[@]}" install install_utils
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# Now, if installing headers into a subdirectory, put everything in its place.
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# Remove the header subdirectory if it existed already.
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if [ -n "${hdr_install_subdir}" ]; then
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CT_DoExecLog ALL mv "${multi_root}/usr/include" "${multi_root}/usr/include.new"
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CT_DoExecLog ALL mv "${multi_root}/usr/include.saved" "${multi_root}/usr/include"
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CT_DoExecLog ALL rm -rf "${multi_root}/usr/include/${hdr_install_subdir}"
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CT_DoExecLog ALL mv "${multi_root}/usr/include.new" "${multi_root}/usr/include/${hdr_install_subdir}"
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fi
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CT_EndStep
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}
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# Initialises the .config file to sensible values
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# $1: original file
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# $2: modified file
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manage_uClibc_config()
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{
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src="$1"
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dst="$2"
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flags="$3"
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# Start with fresh files
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CT_DoExecLog ALL cp "${src}" "${dst}"
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case "${CT_ARCH_ENDIAN}" in
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big|big,little)
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CT_KconfigDisableOption "ARCH_LITTLE_ENDIAN" "${dst}"
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CT_KconfigDisableOption "ARCH_WANTS_LITTLE_ENDIAN" "${dst}"
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CT_KconfigEnableOption "ARCH_BIG_ENDIAN" "${dst}"
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CT_KconfigEnableOption "ARCH_WANTS_BIG_ENDIAN" "${dst}"
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;;
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little|little,big)
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CT_KconfigDisableOption "ARCH_BIG_ENDIAN" "${dst}"
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CT_KconfigDisableOption "ARCH_WANTS_BIG_ENDIAN" "${dst}"
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CT_KconfigEnableOption "ARCH_LITTLE_ENDIAN" "${dst}"
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CT_KconfigEnableOption "ARCH_WANTS_LITTLE_ENDIAN" "${dst}"
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;;
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esac
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if [ "${CT_ARCH_USE_MMU}" = "y" ]; then
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CT_KconfigEnableOption "ARCH_USE_MMU" "${dst}"
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else
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CT_KconfigDisableOption "ARCH_USE_MMU" "${dst}"
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CT_KconfigDisableOption "UCLIBC_FORMAT_FDPIC" "${dst}"
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CT_KconfigDisableOption "UCLIBC_FORMAT_FLAT" "${dst}"
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CT_KconfigDisableOption "UCLIBC_FORMAT_SHARED_FLAT" "${dst}"
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case "${CT_ARCH_BINFMT_FLAT},${CT_ARCH_BINFMT_FDPIC},${CT_SHARED_LIBS}" in
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y,,y) CT_KconfigEnableOption "UCLIBC_FORMAT_SHARED_FLAT" "${dst}";;
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y,,) CT_KconfigEnableOption "UCLIBC_FORMAT_FLAT" "${dst}";;
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,y,*) CT_KconfigEnableOption "UCLIBC_FORMAT_FDPIC" "${dst}";;
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*) CT_Abort "Unsupported binary format";;
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esac
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fi
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if [ "${CT_SHARED_LIBS}" = "y" ]; then
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CT_KconfigEnableOption "HAVE_SHARED" "${dst}"
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else
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CT_KconfigDisableOption "HAVE_SHARED" "${dst}"
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fi
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# Accomodate for old and new uClibc version, where the
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# way to select between hard/soft float has changed
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case "${CT_ARCH_FLOAT}" in
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hard|softfp)
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CT_KconfigEnableOption "UCLIBC_HAS_FPU" "${dst}"
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CT_KconfigEnableOption "UCLIBC_HAS_FLOATS" "${dst}"
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;;
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soft)
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CT_KconfigDisableOption "UCLIBC_HAS_FPU" "${dst}"
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CT_KconfigEnableOption "UCLIBC_HAS_FLOATS" "${dst}"
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CT_KconfigEnableOption "DO_C99_MATH" "${dst}"
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;;
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esac
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if [ "${CT_LIBC_UCLIBC_FENV}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_HAS_FENV" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_HAS_FENV" "${dst}"
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fi
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if [ "${CT_LIBC_UCLIBC_RPC}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_HAS_RPC" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_HAS_RPC" "${dst}"
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fi
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# We always want ctor/dtor
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CT_KconfigEnableOption "UCLIBC_CTOR_DTOR" "${dst}"
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# Change paths to work with crosstool-NG
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#
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# DEVEL_PREFIX is left as '/usr/' because it is post-pended to $PREFIX,
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# which is the correct value of ${PREFIX}/${TARGET}.
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CT_KconfigSetOption "DEVEL_PREFIX" "\"/usr/\"" "${dst}"
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CT_KconfigSetOption "RUNTIME_PREFIX" "\"/\"" "${dst}"
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CT_KconfigSetOption "KERNEL_HEADERS" "\"${CT_HEADERS_DIR}\"" "${dst}"
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# Locales support
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# Note that the two PREGEN_LOCALE and the XLOCALE lines may be missing
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# entirely if LOCALE is not set. If LOCALE was already set, we'll
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# assume the user has already made all the appropriate generation
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# arrangements. Note that having the uClibc Makefile download the
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# pregenerated locales is not compatible with crosstool.
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if [ -z "${CT_LIBC_UCLIBC_LOCALES}" ]; then
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CT_KconfigDisableOption "UCLIBC_HAS_LOCALE" "${dst}"
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else
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CT_KconfigEnableOption "UCLIBC_HAS_LOCALE" "${dst}"
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CT_KconfigDeleteOption "UCLIBC_PREGENERATED_LOCALE_DATA" "${dst}"
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CT_KconfigDeleteOption "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA" "${dst}"
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fi
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# WCHAR support
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if [ "${CT_LIBC_UCLIBC_WCHAR}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_HAS_WCHAR" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_HAS_WCHAR" "${dst}"
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fi
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# IPv6 support
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if [ "${CT_LIBC_UCLIBC_IPV6}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_HAS_IPV6" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_HAS_IPV6" "${dst}"
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fi
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# Iconv support
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if [ "${CT_LIBC_UCLIBC_LIBICONV}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_HAS_LIBICONV" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_HAS_LIBICONV" "${dst}"
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fi
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# Force on options needed for C++ if we'll be making a C++ compiler.
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# I'm not sure locales are a requirement for doing C++... Are they?
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if [ "${CT_CC_LANG_CXX}" = "y" ]; then
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CT_KconfigEnableOption "DO_C99_MATH" "${dst}"
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CT_KconfigEnableOption "UCLIBC_HAS_GNU_GETOPT" "${dst}"
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fi
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# Stack Smash Protection (SSP)
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if [ "${CT_LIBC_UCLIBC_HAS_SSP}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_HAS_SSP" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_HAS_SSP" "${dst}"
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fi
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if [ "${CT_LIBC_UCLIBC_BUILD_SSP}" = "y" ]; then
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CT_KconfigEnableOption "UCLIBC_BUILD_SSP" "${dst}"
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else
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CT_KconfigDisableOption "UCLIBC_BUILD_SSP" "${dst}"
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fi
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# Push the threading model
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CT_KconfigDisableOption "UCLIBC_HAS_THREADS" "${dst}"
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CT_KconfigDisableOption "LINUXTHREADS_OLD" "${dst}"
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CT_KconfigDisableOption "LINUXTHREADS_NEW" "${dst}"
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CT_KconfigDisableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}"
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case "${CT_THREADS}" in
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none)
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;;
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linuxthreads)
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CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}"
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CT_KconfigEnableOption "UCLIBC_HAS_LINUXTHREADS" "${dst}"
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;;
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nptl)
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CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}"
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CT_KconfigEnableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}"
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;;
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*)
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CT_Abort "Incorrect thread settings: CT_THREADS='${CT_THREADS}'"
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;;
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esac
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# Always build the libpthread_db
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CT_KconfigEnableOption "PTHREADS_DEBUG_SUPPORT" "${dst}"
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# Force on debug options if asked for
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CT_KconfigDisableOption "DODEBUG" "${dst}"
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CT_KconfigDisableOption "DODEBUG_PT" "${dst}"
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CT_KconfigDisableOption "DOASSERTS" "${dst}"
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CT_KconfigDisableOption "SUPPORT_LD_DEBUG" "${dst}"
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CT_KconfigDisableOption "SUPPORT_LD_DEBUG_EARLY" "${dst}"
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CT_KconfigDisableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}"
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case "${CT_LIBC_UCLIBC_DEBUG_LEVEL}" in
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0)
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;;
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1)
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CT_KconfigEnableOption "DODEBUG" "${dst}"
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;;
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2)
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CT_KconfigEnableOption "DODEBUG" "${dst}"
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CT_KconfigEnableOption "DOASSERTS" "${dst}"
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CT_KconfigEnableOption "SUPPORT_LD_DEBUG" "${dst}"
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CT_KconfigEnableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}"
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;;
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3)
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CT_KconfigEnableOption "DODEBUG" "${dst}"
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CT_KconfigEnableOption "DODEBUG_PT" "${dst}"
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CT_KconfigEnableOption "DOASSERTS" "${dst}"
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CT_KconfigEnableOption "SUPPORT_LD_DEBUG" "${dst}"
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CT_KconfigEnableOption "SUPPORT_LD_DEBUG_EARLY" "${dst}"
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CT_KconfigEnableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}"
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;;
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esac
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# Remove stripping: its the responsibility of the
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# firmware builder to strip or not.
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CT_KconfigDisableOption "DOSTRIP" "${dst}"
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# Now allow architecture to tweak as it wants
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CT_DoArchUClibcConfig "${dst}"
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CT_DoArchUClibcCflags "${dst}" "${flags}"
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# Preserve the config we created (before uclibc's `make olddefconfig`
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# overrides anything).
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CT_DoExecLog ALL cp "${dst}" "${dst}.created-by-ct-ng"
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}
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uClibc_ng_post_cc()
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{
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# uClibc and GCC disagree where the dynamic linker lives. uClibc always
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# places it in the MULTILIB_DIR, while gcc does that for *some* variants
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# and expects it in /lib for the other. So, create a symlink from lib
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# to the actual location, but only if that will not override the actual
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# file in /lib. Thus, need to do this after all the variants are built.
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# Moreover, need to do this after the final compiler is built: on targets
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# that use elf2flt, the core compilers cannot find ld when running elf2flt.
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CT_MultilibFixupLDSO
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if [ -n "${CT_LIBC_UCLIBC_CONFIG_FILE}" ]; then
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CT_InstallConfigurationFile "${CT_LIBC_UCLIBC_CONFIG_FILE}" libc
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fi
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}
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