# Build script for libelf

do_libelf_get() { :; }

do_libelf_extract() { :; }

do_libelf_for_build() { :; }

do_libelf_for_host() { :; }

do_libelf_for_target() { :; }

if [ "${CT_LIBELF}" = "y" -o "${CT_LIBELF_TARGET}" = "y" ]; then

do_libelf_get() {

    # The server hosting libelf will return an "HTTP 300 : Multiple Choices"

    # error code if we try to download a file that does not exists there.

    # So we have to request the file with an explicit extension.

    CT_GetFile "libelf-${CT_LIBELF_VERSION}" .tar.gz http://www.mr511.de/software/

}

do_libelf_extract() {

    CT_Extract "libelf-${CT_LIBELF_VERSION}"

    CT_Patch "libelf" "${CT_LIBELF_VERSION}"

}

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

# Build libelf for running on build

# - always build statically

# - we do not have build-specific CFLAGS

# - install in build-tools prefix

do_libelf_for_build() {

    local -a libelf_opts

    case "${CT_TOOLCHAIN_TYPE}" in

        native|cross)   return 0;;

    esac

    CT_DoStep INFO "Installing libelf for build"

    CT_mkdir_pushd "${CT_BUILD_DIR}/build-libelf-build-${CT_BUILD}"

    libelf_opts+=( "host=${CT_BUILD}" )

    libelf_opts+=( "prefix=${CT_BUILDTOOLS_PREFIX_DIR}" )

    libelf_opts+=( "cflags=${CT_CFLAGS_FOR_BUILD}" )

    libelf_opts+=( "ldflags=${CT_LDFLAGS_FOR_BUILD}" )

    do_libelf_backend "${libelf_opts[@]}"

    CT_Popd

    CT_EndStep

}

# Build libelf for running on host

do_libelf_for_host() {

    local -a libelf_opts

    CT_DoStep INFO "Installing libelf for host"

    CT_mkdir_pushd "${CT_BUILD_DIR}/build-libelf-host-${CT_HOST}"

    libelf_opts+=( "host=${CT_HOST}" )

    libelf_opts+=( "prefix=${CT_HOST_COMPLIBS_DIR}" )

    libelf_opts+=( "cflags=${CT_CFLAGS_FOR_HOST}" )

    libelf_opts+=( "ldflags=${CT_LDFLAGS_FOR_HOST}" )

    do_libelf_backend "${libelf_opts[@]}"

    CT_Popd

    CT_EndStep

}

fi # CT_LIBELF

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

do_libelf_for_target() {

    local -a libelf_opts

    CT_DoStep INFO "Installing libelf for the target"

    CT_mkdir_pushd "${CT_BUILD_DIR}/build-libelf-target-${CT_TARGET}"

    libelf_opts+=( "destdir=${CT_SYSROOT_DIR}" )

    libelf_opts+=( "host=${CT_TARGET}" )

    libelf_opts+=( "prefix=/usr" )

    libelf_opts+=( "shared=y" )

    do_libelf_backend "${libelf_opts[@]}"

    CT_Popd

    CT_EndStep

}

fi # CT_LIBELF_TARGET

# Build libelf

#     Parameter     : description               : type      : default

#     destdir       : out-of-tree install dir   : string    : /

#     host          : machine to run on         : tuple     : (none)

#     prefix        : prefix to install into    : dir       : (none)

#     cflags        : cflags to use             : string    : (empty)

#     ldflags       : ldflags to use            : string    : (empty)

#     shared        : also buils shared lib     : bool      : n

do_libelf_backend() {

    local destdir="/"

    local host

    local prefix

    local cflags

    local ldflags

    local shared

    local -a extra_config

    local arg

    for arg in "$@"; do

        eval "${arg// /\\ }"

    done

    CT_DoLog EXTRA "Configuring libelf"

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

        extra_config+=( --enable-shared )

    else

        extra_config+=( --disable-shared )

    fi

    CT_DoExecLog CFG                                        \

    CC="${host}-gcc"                                        \

    RANLIB="${host}-ranlib"                                 \

    CFLAGS="${cflags} -fPIC"                                \

    LDFLAGS="${ldflags}"                                    \

    "${CT_SRC_DIR}/libelf-${CT_LIBELF_VERSION}/configure"   \

        --build=${CT_BUILD}                                 \

        --host=${host}                                      \

        --target=${CT_TARGET}                               \

        --prefix="${prefix}"                                \

        --enable-compat                                     \

        --enable-elf64                                      \

        --enable-extended-format                            \

        --enable-static                                     \

        "${extra_config[@]}"

    CT_DoLog EXTRA "Building libelf"

    CT_DoExecLog ALL make

    CT_DoLog EXTRA "Installing libelf"

    CT_DoExecLog ALL make instroot="${destdir}" install

}

fi # CT_LIBELF || CT_LIBELF_TARGET