# eglibc build functions (initially by Thomas JOURDAN).

# Download eglibc repository

do_eglibc_get() {

    CT_HasOrAbort svn

    case "${CT_LIBC_VERSION}" in

        trunk)  svn_url="svn://svn.eglibc.org/trunk";;

        *)      svn_url="svn://svn.eglibc.org/branches/eglibc-${CT_LIBC_VERSION}";;

    esac

    case "${CT_EGLIBC_CHECKOUT}" in

        y)  svn_action="checkout";;

        *)  svn_action="export --force";;

    esac

    CT_DoExecLog ALL svn ${svn_action} -r "${CT_EGLIBC_REVISION:-HEAD}" "${svn_url}" . 2>&1

    # Compress eglibc

    CT_DoExecLog ALL mv libc "eglibc-${CT_LIBC_VERSION}"

    CT_DoExecLog ALL tar cjf "eglibc-${CT_LIBC_VERSION}.tar.bz2" "eglibc-${CT_LIBC_VERSION}"

    # Compress linuxthreads, localedef and ports

    # Assign them the name the way ct-ng like it

    for addon in linuxthreads localedef ports; do

        CT_DoExecLog ALL mv "${addon}" "eglibc-${addon}-${CT_LIBC_VERSION}"

        CT_DoExecLog ALL tar cjf "eglibc-${addon}-${CT_LIBC_VERSION}.tar.bz2" "eglibc-${addon}-${CT_LIBC_VERSION}"

    done

}

# Download glibc

do_libc_get() {

    # eglibc is only available through subversion, there are no

    # snapshots available. Moreover, addons will be downloaded

    # simultaneously.

    # build filename

    eglibc="eglibc-${CT_LIBC_VERSION}.tar.bz2"

    eglibc_linuxthreads="${CT_LIBC}-linuxthreads-${CT_LIBC_VERSION}.tar.bz2"

    eglibc_localedef="${CT_LIBC}-localedef-${CT_LIBC_VERSION}.tar.bz2"

    eglibc_ports="${CT_LIBC}-ports-${CT_LIBC_VERSION}.tar.bz2"

    # Check if every tarballs are already present

    if [    -f "${CT_TARBALLS_DIR}/${eglibc}"                   \

         -a -f "${CT_TARBALLS_DIR}/${eglibc_linuxthreads}"      \

         -a -f "${CT_TARBALLS_DIR}/${eglibc_localedef}"         \

         -a -f "${CT_TARBALLS_DIR}/${eglibc_ports}"             \

       ]; then

        CT_DoLog DEBUG "Already have 'eglibc-${CT_LIBC_VERSION}'"

        return 0

    fi

    if [    -f "${CT_LOCAL_TARBALLS_DIR}/${eglibc}"                 \

         -a -f "${CT_LOCAL_TARBALLS_DIR}/${eglibc_linuxthreads}"    \

         -a -f "${CT_LOCAL_TARBALLS_DIR}/${eglibc_localedef}"       \

         -a -f "${CT_LOCAL_TARBALLS_DIR}/${eglibc_ports}"           \

         -a "${CT_FORCE_DOWNLOAD}" != "y"                           \

       ]; then

        CT_DoLog DEBUG "Got 'eglibc-${CT_LIBC_VERSION}' from local storage"

        for file in ${eglibc} ${eglibc_linuxthreads} ${eglibc_localedef} ${eglibc_ports}; do

            CT_DoExecLog ALL ln -s "${CT_LOCAL_TARBALLS_DIR}/${file}" "${CT_TARBALLS_DIR}/${file}"

        done

        return 0

    fi

    # Not found locally, try from the network

    CT_DoLog EXTRA "Retrieving 'eglibc-${CT_LIBC_VERSION}'"

    CT_MktempDir tmp_dir

    CT_Pushd "${tmp_dir}"

    do_eglibc_get

    CT_DoLog DEBUG "Moving 'eglibc-${CT_LIBC_VERSION}' to tarball directory"

    for file in ${eglibc} ${eglibc_linuxthreads} ${eglibc_localedef} ${eglibc_ports}; do

        CT_DoExecLog ALL mv -f "${file}" "${CT_TARBALLS_DIR}"

    done

    CT_Popd

    # Remove source files

    CT_DoExecLog ALL rm -rf "${tmp_dir}"

    if [ "${CT_SAVE_TARBALLS}" = "y" ]; then

        CT_DoLog EXTRA "Saving 'eglibc-${CT_LIBC_VERSION}' to local storage"

        for file in ${eglibc} ${eglibc_linuxthreads} ${eglibc_localedef} ${eglibc_ports}; do

            CT_DoExecLog ALL mv -f "${CT_TARBALLS_DIR}/${file}" "${CT_LOCAL_TARBALLS_DIR}"

            CT_DoExecLog ALL ln -s "${CT_LOCAL_TARBALLS_DIR}/${file}" "${CT_TARBALLS_DIR}/${file}"

        done

    fi

    return 0

}

# Extract eglibc

do_libc_extract() {

    CT_Extract "eglibc-${CT_LIBC_VERSION}"

    CT_Patch "eglibc" "${CT_LIBC_VERSION}"

    # C library addons

    for addon in $(do_libc_add_ons_list " "); do

        # NPTL addon is not to be extracted, in any case

        [ "${addon}" = "nptl" ] && continue || true

        CT_Pushd "${CT_SRC_DIR}/eglibc-${CT_LIBC_VERSION}"

        CT_Extract nochdir "eglibc-${addon}-${CT_LIBC_VERSION}"

        # Some addons have the 'long' name, while others have the

        # 'short' name, but patches are non-uniformly built with

        # either the 'long' or 'short' name, whatever the addons name

        # so we have to make symlinks from the existing to the missing

        # Fortunately for us, [ -d foo ], when foo is a symlink to a

        # directory, returns true!

        [ -d "${addon}" ] || ln -s "eglibc-${addon}-${CT_LIBC_VERSION}" "${addon}"

        [ -d "eglibc-${addon}-${CT_LIBC_VERSION}" ] || ln -s "${addon}" "eglibc-${addon}-${CT_LIBC_VERSION}"

        CT_Patch nochdir "eglibc" "${addon}-${CT_LIBC_VERSION}"

        CT_Popd

    done

    # The configure files may be older than the configure.in files

    # if using a snapshot (or even some tarballs). Fake them being

    # up to date.

    find "${CT_SRC_DIR}/eglibc-${CT_LIBC_VERSION}" -type f -name configure -exec touch {} \; 2>&1 |CT_DoLog ALL

    return 0

}

# Copy user provided eglibc configuration file if provided

do_libc_check_config() {

    if [ "${CT_EGLIBC_CUSTOM_CONFIG}" != "y" ]; then

        return 0

    fi

    CT_DoStep INFO "Checking C library configuration"

    CT_TestOrAbort "You did not provide an eglibc config file!" \

        -n "${CT_EGLIBC_OPTION_GROUPS_FILE}" -a \

        -f "${CT_EGLIBC_OPTION_GROUPS_FILE}"

    CT_DoExecLog ALL cp "${CT_EGLIBC_OPTION_GROUPS_FILE}" "${CT_CONFIG_DIR}/eglibc.config"

    # NSS configuration

    if grep -E '^OPTION_EGLIBC_NSSWITCH[[:space:]]*=[[:space:]]*n' "${CT_EGLIBC_OPTION_GROUPS_FILE}" >/dev/null 2>&1; then

        CT_DoLog DEBUG "Using fixed-configuration nsswitch facility"

        if [ "${CT_EGLIBC_BUNDLED_NSS_CONFIG}" = "y" ]; then

            nss_config="${CT_SRC_DIR}/eglibc-${CT_LIBC_VERSION}/nss/fixed-nsswitch.conf"

        else

            nss_config="${CT_EGLIBC_NSS_CONFIG_FILE}"

        fi

        CT_TestOrAbort "NSS config file not found!" -n "${nss_config}" -a -f "${nss_config}"

        CT_DoExecLog ALL cp "${nss_config}" "${CT_CONFIG_DIR}/nsswitch.config"

        echo "OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG = ${CT_CONFIG_DIR}/nsswitch.config" \

            >> "${CT_CONFIG_DIR}/eglibc.config"

        if [ "${CT_EGLIBC_BUNDLED_NSS_FUNCTIONS}" = "y" ]; then

            nss_functions="${CT_SRC_DIR}/eglibc-${CT_LIBC_VERSION}/nss/fixed-nsswitch.functions"

        else

            nss_functions="${CT_EGLIBC_NSS_FUNCTIONS_FILE}"

        fi

        CT_TestOrAbort "NSS functions file not found!" -n "${nss_functions}" -a -f "${nss_functions}"

        CT_DoExecLog ALL cp "${nss_functions}" "${CT_CONFIG_DIR}/nsswitch.functions"

        echo "OPTION_EGLIBC_NSSWITCH_FIXED_FUNCTIONS = ${CT_CONFIG_DIR}/nsswitch.functions" \

            >> "${CT_CONFIG_DIR}/eglibc.config"

    else

        CT_DoLog DEBUG "Using full-blown nsswitch facility"

    fi

    CT_EndStep

}

# This function installs the eglibc headers needed to build the core compiler

do_libc_headers() {

    # Instead of doing two time the same actions, headers will

    # be installed with start files

    :

}

# Build and install start files

do_libc_start_files() {

    CT_DoStep INFO "Installing C library headers / start files"

    mkdir -p "${CT_BUILD_DIR}/build-libc-startfiles"

    cd "${CT_BUILD_DIR}/build-libc-startfiles"

    CT_DoLog EXTRA "Configuring C library"

    if [ "${CT_EGLIBC_CUSTOM_CONFIG}" = "y" ]; then

        CT_DoExecLog ALL cp "${CT_CONFIG_DIR}/eglibc.config" option-groups.config

    fi

    cross_cc=$(CT_Which "${CT_TARGET}-gcc")

    cross_cxx=$(CT_Which "${CT_TARGET}-g++")

    cross_ar=$(CT_Which "${CT_TARGET}-ar")

    cross_ranlib=$(CT_Which "${CT_TARGET}-ranlib")

    CT_DoLog DEBUG "Using gcc for target: '${cross_cc}'"

    CT_DoLog DEBUG "Using g++ for target: '${cross_cxx}'"

    CT_DoLog DEBUG "Using ar for target: '${cross_ar}'"

    CT_DoLog DEBUG "Using ranlib for target: '${cross_ranlib}'"

    BUILD_CC="${CT_BUILD}-gcc"                          \

    CC=${cross_cc}                                      \

    CXX=${cross_cxx}                                    \

    AR=${cross_ar}                                      \

    RANLIB=${cross_ranlib}                              \

    CT_DoExecLog ALL                                    \

    "${CT_SRC_DIR}/eglibc-${CT_LIBC_VERSION}/configure" \

        --prefix=/usr                                   \

        --with-headers="${CT_HEADERS_DIR}"              \

        --build="${CT_BUILD}"                           \

        --host="${CT_TARGET}"                           \

        --disable-profile                               \

        --without-gd                                    \

        --without-cvs                                   \

        --enable-add-ons

    CT_DoLog EXTRA "Installing C library headers"

    # use the 'install-headers' makefile target to install the

    # headers

    CT_DoExecLog ALL                    \

    make install-headers                \

         install_root=${CT_SYSROOT_DIR} \

         install-bootstrap-headers=yes

    CT_DoLog EXTRA "Installing C library start files"

    # there are a few object files needed to link shared libraries,

    # which we build and install by hand

    CT_DoExecLog ALL mkdir -p ${CT_SYSROOT_DIR}/usr/lib

    CT_DoExecLog ALL make csu/subdir_lib

    CT_DoExecLog ALL cp csu/crt1.o csu/crti.o csu/crtn.o \

        ${CT_SYSROOT_DIR}/usr/lib

    # Finally, 'libgcc_s.so' requires a 'libc.so' to link against.  

    # However, since we will never actually execute its code, 

    # it doesn't matter what it contains.  So, treating '/dev/null' 

    # as a C source file, we produce a dummy 'libc.so' in one step

    CT_DoExecLog ALL ${cross_cc} -nostdlib -nostartfiles -shared -x c /dev/null -o ${CT_SYSROOT_DIR}/usr/lib/libc.so

    CT_EndStep

}

# This function builds and install the full glibc

do_libc() {

    local -a extra_config

    CT_DoStep INFO "Installing C library"

    mkdir -p "${CT_BUILD_DIR}/build-libc"

    cd "${CT_BUILD_DIR}/build-libc"

    CT_DoLog EXTRA "Configuring C library"

    if [ "${CT_EGLIBC_CUSTOM_CONFIG}" = "y" ]; then

        CT_DoExecLog ALL cp "${CT_CONFIG_DIR}/eglibc.config" option-groups.config

    fi

    if [ "${CT_EGLIBC_OPT_SIZE}" = "y" ]; then

        OPTIMIZE=-Os

    else

        OPTIMIZE=-O2

    fi

    # Add some default glibc config options if not given by user.

    # We don't need to be conditional on wether the user did set different

    # values, as they CT_LIBC_GLIBC_EXTRA_CONFIG is passed after extra_config

    extra_config+=("--enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')")

    case "${CT_THREADS}" in

        nptl)           extra_config+=("--with-__thread" "--with-tls");;

        linuxthreads)   extra_config+=("--with-__thread" "--without-tls" "--without-nptl");;

        none)           extra_config+=("--without-__thread" "--without-nptl")

                        case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in

                            *-tls*) ;;

                            *) extra_config+=("--without-tls");;

                        esac

                        ;;

    esac

    case "${CT_SHARED_LIBS}" in

        y) extra_config+=("--enable-shared");;

        *) extra_config+=("--disable-shared");;

    esac

    case "${CT_ARCH_FLOAT_HW},${CT_ARCH_FLOAT_SW}" in

        y,) extra_config+=("--with-fp");;

        ,y) extra_config+=("--without-fp");;

    esac

    case "$(do_libc_add_ons_list ,)" in

        "") ;;

        *)  extra_config+=("--enable-add-ons=$(do_libc_add_ons_list ,)");;

    esac

    extra_cc_args="${extra_cc_args} ${CT_ARCH_ENDIAN_OPT}"

    cross_cc=$(CT_Which "${CT_TARGET}-gcc")    

    CT_DoLog DEBUG "Using gcc for target:     '${cross_cc}'"

    CT_DoLog DEBUG "Configuring with addons : '$(do_libc_add_ons_list ,)'"

    CT_DoLog DEBUG "Extra config args passed: '${extra_config[*]}'"

    CT_DoLog DEBUG "Extra CC args passed    : '${extra_cc_args}'"

    BUILD_CC="${CT_BUILD}-gcc"                                      \

    CFLAGS="${CT_TARGET_CFLAGS} ${CT_LIBC_GLIBC_EXTRA_CFLAGS} ${OPTIMIZE}"  \

    CC="${CT_TARGET}-gcc ${CT_LIBC_EXTRA_CC_ARGS} ${extra_cc_args}" \

    AR=${CT_TARGET}-ar                                              \

    RANLIB=${CT_TARGET}-ranlib                                      \

    CT_DoExecLog ALL                                                \

    "${CT_SRC_DIR}/eglibc-${CT_LIBC_VERSION}/configure"             \

        --prefix=/usr                                               \

        --with-headers="${CT_HEADERS_DIR}"                          \

        --build=${CT_BUILD}                                         \

        --host=${CT_TARGET}                                         \

        --disable-profile                                           \

        --without-gd                                                \

        --without-cvs                                               \

        "${extra_config[@]}"                                        \

        ${CT_LIBC_GLIBC_EXTRA_CONFIG}

    CT_DoLog EXTRA "Building C library"

    # eglibc build hacks

    # http://sourceware.org/ml/crossgcc/2008-10/msg00068.html

    case "${CT_ARCH},${CT_ARCH_CPU}" in

        powerpc,8??)

            CT_DoLog DEBUG "Activating support for memset on broken ppc-8xx (CPU15 erratum)"

            EGLIBC_BUILD_ASFLAGS="-DBROKEN_PPC_8xx_CPU15";;

    esac

    CT_DoExecLog ALL make ASFLAGS="${EGLIBC_BUILD_ASFLAGS}"

    CT_DoLog EXTRA "Installing C library"

    CT_DoExecLog ALL make install install_root="${CT_SYSROOT_DIR}"

    CT_EndStep

}

# This function finishes the glibc install

do_libc_finish() {

    # Nothing to be done for eglibc

    :

}

# Build up the addons list, separated with $1

do_libc_add_ons_list() {

    local sep="$1"

    local addons_list=$(echo "${CT_LIBC_ADDONS_LIST//,/${sep}}" |tr -s ,)

    case "${CT_THREADS}" in

        none)   ;;

        *)      addons_list="${addons_list}${sep}${CT_THREADS}";;

    esac

    [ "${CT_LIBC_GLIBC_USE_PORTS}" = "y" ] && addons_list="${addons_list}${sep}ports"

    addons_list="${addons_list%%${sep}}"

    echo "${addons_list##${sep}}"

}