# This file adds functions to build the Newlib C library
# Copyright 2009 DoréDevelopment
# Licensed under the GPL v2. See COPYING in the root of this package
#
# Edited by Martin Lund <mgl@doredevelopment.dk>
#

LIBC_NEWLIB_AVR_HDRS_URI="http://www.atmel.com/Images"
LIBC_NEWLIB_AVR_HDRS_BASE="avr-headers-3.2.3.970"
LIBC_NEWLIB_AVR_HDRS_EXT=".zip"

do_libc_get() {
    local libc_src="{http://mirrors.kernel.org/sourceware/newlib,
                     ftp://sourceware.org/pub/newlib}"

    if [ "${CT_LIBC_NEWLIB_CUSTOM}" = "y" ]; then
        CT_GetCustom "newlib" "${CT_LIBC_VERSION}"      \
                     "${CT_LIBC_NEWLIB_CUSTOM_LOCATION}"
    else # ! custom location
        if echo ${CT_LIBC_VERSION} |grep -q linaro; then
            YYMM=`echo ${CT_LIBC_VERSION} |cut -d- -f3 |${sed} -e 's,^..,,'`
            CT_GetFile "newlib-${CT_LIBC_VERSION}" ${libc_src} \
                       https://releases.linaro.org/${YYMM}/components/toolchain/newlib-linaro \
                       http://cbuild.validation.linaro.org/snapshots
        else
            CT_GetFile "newlib-${CT_LIBC_VERSION}" ${libc_src} \
                       http://mirrors.kernel.org/sources.redhat.com/newlib
        fi
    fi # ! custom location
}

do_libc_extract() {
    # If using custom directory location, nothing to do
    if [    "${CT_LIBC_NEWLIB_CUSTOM}" = "y"             \
         -a -d "${CT_SRC_DIR}/newlib-${CT_LIBC_VERSION}" ]; then
        return 0
    fi

    CT_Extract "newlib-${CT_LIBC_VERSION}"
    CT_Patch "newlib" "${CT_LIBC_VERSION}"
}

do_libc_check_config() {
    :
}

do_libc_start_files() {
    CT_DoStep INFO "Installing C library headers & start files"
    CT_DoExecLog ALL cp -a "${CT_SRC_DIR}/newlib-${CT_LIBC_VERSION}/newlib/libc/include/." \
    "${CT_HEADERS_DIR}"
    CT_EndStep
}

do_libc() {
    local -a newlib_opts
    local cflags_for_target

    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 [ "${CT_LIBC_NEWLIB_IO_C99FMT}" = "y" ]; then
        newlib_opts+=( "--enable-newlib-io-c99-formats" )
    else
        newlib_opts+=( "--disable-newlib-io-c99-formats" )
    fi
    if [ "${CT_LIBC_NEWLIB_IO_LL}" = "y" ]; then
        newlib_opts+=( "--enable-newlib-io-long-long" )
    else
        newlib_opts+=( "--disable-newlib-io-long-long" )
    fi
    if [ "${CT_LIBC_NEWLIB_IO_FLOAT}" = "y" ]; then
        newlib_opts+=( "--enable-newlib-io-float" )
        if [ "${CT_LIBC_NEWLIB_IO_LDBL}" = "y" ]; then
            newlib_opts+=( "--enable-newlib-io-long-double" )
        else
            newlib_opts+=( "--disable-newlib-io-long-double" )
        fi
    else
        newlib_opts+=( "--disable-newlib-io-float" )
        newlib_opts+=( "--disable-newlib-io-long-double" )
    fi
    if [ "${CT_LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS}" = "y" ]; then
        newlib_opts+=( "--disable-newlib-supplied-syscalls" )
    else
        newlib_opts+=( "--enable-newlib-supplied-syscalls" )
    fi

    [ "${CT_LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE}" = "y" ] && newlib_opts+=("--enable-target-optspace")

    cflags_for_target="${CT_TARGET_CFLAGS} ${CT_LIBC_NEWLIB_TARGET_CFLAGS}"

    # Note: newlib handles the build/host/target a little bit differently
    # than one would expect:
    #   build  : not used
    #   host   : the machine building newlib
    #   target : the machine newlib runs on
    CT_DoExecLog CFG                                    \
    CC_FOR_BUILD="${CT_BUILD}-gcc"                      \
    CFLAGS_FOR_TARGET="${cflags_for_target}"            \
    AR=${CT_TARGET}-ar                                  \
    RANLIB=${CT_TARGET}-ranlib                          \
    "${CT_SRC_DIR}/newlib-${CT_LIBC_VERSION}/configure" \
        --host=${CT_BUILD}                              \
        --target=${CT_TARGET}                           \
        --prefix=${CT_PREFIX_DIR}                       \
        "${newlib_opts[@]}"                             \
        "${CT_LIBC_NEWLIB_EXTRA_CONFIG_ARRAY[@]}"

    CT_DoLog EXTRA "Building C library"
    CT_DoExecLog ALL make ${JOBSFLAGS}

    CT_DoLog EXTRA "Installing C library"
    CT_DoExecLog ALL make install install_root="${CT_SYSROOT_DIR}"

    if [ "${CT_BUILD_MANUALS}" = "y" ]; then
        local -a doc_dir="${CT_BUILD_DIR}/build-libc/${CT_TARGET}"

        CT_DoLog EXTRA "Building and installing the C library manual"
        CT_DoExecLog ALL make pdf html

        # NEWLIB install-{pdf.html} fail for some versions
        CT_DoExecLog ALL mkdir -p "${CT_PREFIX_DIR}/share/doc/newlib"
        CT_DoExecLog ALL cp -av "${doc_dir}/newlib/libc/libc.pdf"   \
                                "${doc_dir}/newlib/libm/libm.pdf"   \
                                "${doc_dir}/newlib/libc/libc.html"  \
                                "${doc_dir}/newlib/libm/libm.html"  \
                                "${CT_PREFIX_DIR}/share/doc/newlib"
    fi

    CT_EndStep
}

do_libc_post_cc() {
    :
}