# 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() {

    libc_src="http://www.uclibc.org/downloads

              http://www.uclibc.org/downloads/snapshots

              http://www.uclibc.org/downloads/old-releases"

    # For uClibc, we have almost every thing: releases, and snapshots

    # for the last month or so. We'll have to deal with svn revisions

    # later...

    CT_GetFile "uClibc-${CT_LIBC_VERSION}" ${libc_src}

    # uClibc locales

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

        CT_GetFile "uClibc-locale-030818" ${libc_src}

    fi

    return 0

}

libc_uclibc_src_dir() {

    if [    -z "${CT_LIBC_V_snapshot}"      \

         -a -z "${CT_LIBC_V_specific_date}" \

       ]; then

        echo "${CT_SRC_DIR}/uClibc-${CT_LIBC_VERSION}"

    else

        echo "${CT_SRC_DIR}/uClibc"

    fi

}

# Extract uClibc

do_libc_extract() {

    CT_Extract "uClibc-${CT_LIBC_VERSION}"

    # Don't patch snapshots

    if [    -z "${CT_LIBC_V_snapshot}"      \

         -a -z "${CT_LIBC_V_specific_date}" \

       ]; then

        CT_Patch "uClibc" "${CT_LIBC_VERSION}"

    fi

    # uClibc locales

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

        CT_Pushd "$(libc_uclibc_src_dir)/extra/locale"

        CT_Extract nochdir "uClibc-locale-030818"

        CT_Patch nochdir "uClibc" "locale-030818"

        CT_Popd

    fi

    return 0

}

# Check that uClibc has been previously configured

do_libc_check_config() {

    CT_DoStep INFO "Checking C library configuration"

    CT_TestOrAbort "You did not provide a uClibc config file!" -n "${CT_LIBC_UCLIBC_CONFIG_FILE}" -a -f "${CT_LIBC_UCLIBC_CONFIG_FILE}"

    if grep -E '^KERNEL_SOURCE=' "${CT_LIBC_UCLIBC_CONFIG_FILE}" >/dev/null 2>&1; then

        CT_DoLog WARN "Your uClibc version refers to the kernel _sources_, which is bad."

        CT_DoLog WARN "I can't guarantee that our little hack will work. Please try to upgrade."

    fi

    CT_DoLog EXTRA "Munging uClibc configuration"

    mungeuClibcConfig "${CT_LIBC_UCLIBC_CONFIG_FILE}" "${CT_CONFIG_DIR}/uClibc.config"

    CT_EndStep

}

# This functions installs uClibc's headers

do_libc_headers() {

    local install_rule

    local cross

    CT_DoStep INFO "Installing C library headers"

    # 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 "$(libc_uclibc_src_dir)"            \

                            "${CT_BUILD_DIR}/build-libc-headers"

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

    # Retrieve the config file

    CT_DoExecLog ALL cp "${CT_CONFIG_DIR}/uClibc.config" .config

    # uClibc uses the CROSS environment variable as a prefix to the

    # compiler tools to use.  Setting it to the empty string forces

    # use of the native build host tools, which we need at this

    # stage, as we don't have target tools yet.

    # BUT! With NPTL, we need a cross-compiler (and we have it)

    if [ "${CT_THREADS}" = "nptl" ]; then

        cross="${CT_TARGET}-"

    fi

    CT_DoLog EXTRA "Applying configuration"

    CT_DoYes "" |CT_DoExecLog ALL               \

                 make CROSS="${cross}"          \

                 PREFIX="${CT_SYSROOT_DIR}/"    \

                 oldconfig

    CT_DoLog EXTRA "Building headers"

    CT_DoExecLog ALL                    \

    make ${CT_LIBC_UCLIBC_VERBOSITY}    \

         CROSS="${cross}"               \

         PREFIX="${CT_SYSROOT_DIR}/"    \

         headers

    if [ "${CT_LIBC_UCLIBC_0_9_30_or_later}" = "y" ]; then

        install_rule=install_headers

    else

        install_rule=install_dev

    fi

    CT_DoLog EXTRA "Installing headers"

    CT_DoExecLog ALL                    \

    make ${CT_LIBC_UCLIBC_VERBOSITY}    \

         CROSS="${cross}"               \

         PREFIX="${CT_SYSROOT_DIR}/"    \

         ${install_rule}

    if [ "${CT_THREADS}" = "nptl" ]; then

        CT_DoLog EXTRA "Building start files"

        CT_DoExecLog ALL                                    \

        make ${CT_LIBC_UCLIBC_PARALLEL:+${PARALLELMFLAGS}}  \

             CROSS="${cross}"                               \

             PREFIX="${CT_SYSROOT_DIR}/"                    \

             STRIPTOOL=true                                 \

             ${CT_LIBC_UCLIBC_VERBOSITY}                    \

             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 "${cross}gcc" -nostdlib        \

                                       -nostartfiles    \

                                       -shared          \

                                       -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   \

                                         "${CT_SYSROOT_DIR}/usr/lib"

        CT_DoLog EXTRA "Installing dummy shared libs"

        CT_DoExecLog ALL install -m 0755 libdummy.so "${CT_SYSROOT_DIR}/usr/lib/libc.so"

        CT_DoExecLog ALL install -m 0755 libdummy.so "${CT_SYSROOT_DIR}/usr/lib/libm.so"

    fi # CT_THREADS == nptl

    CT_EndStep

}

# Build and install start files

do_libc_start_files() {

    :

}

# This function build and install the full uClibc

do_libc() {

    CT_DoStep INFO "Installing C library"

    # 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 "$(libc_uclibc_src_dir)"    \

                            "${CT_BUILD_DIR}/build-libc"

    cd "${CT_BUILD_DIR}/build-libc"

    # Retrieve the config file

    CT_DoExecLog ALL cp "${CT_CONFIG_DIR}/uClibc.config" .config

    # uClibc uses the CROSS environment variable as a prefix to the compiler

    # tools to use.  The newly built tools should be in our path, so we need

    # only give the correct name for them.

    # 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.

    CT_DoLog EXTRA "Applying configuration"

    CT_DoYes "" |CT_DoExecLog ALL               \

                 make CROSS=${CT_TARGET}-       \

                 PREFIX="${CT_SYSROOT_DIR}/"    \

                 oldconfig

    # We do _not_ want to strip anything for now, in case we specifically

    # asked for a debug toolchain, thus the STRIPTOOL= assignment

    # /Old/ versions can not build in //

    CT_DoLog EXTRA "Building C library"

    CT_DoExecLog ALL                                    \

    make -j1                                            \

         CROSS=${CT_TARGET}-                            \

         PREFIX="${CT_SYSROOT_DIR}/"                    \

         STRIPTOOL=true                                 \

         ${CT_LIBC_UCLIBC_VERBOSITY}                    \

         pregen

    CT_DoExecLog ALL                                    \

    make ${CT_LIBC_UCLIBC_PARALLEL:+${PARALLELMFLAGS}}  \

         CROSS=${CT_TARGET}-                            \

         PREFIX="${CT_SYSROOT_DIR}/"                    \

         STRIPTOOL=true                                 \

         ${CT_LIBC_UCLIBC_VERBOSITY}                    \

         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...

    #

    # We do _not_ want to strip anything for now, in case we specifically

    # asked for a debug toolchain, hence the STRIPTOOL= assignment

    #

    # Note: PARALLELMFLAGS is not usefull for installation.

    #

    CT_DoLog EXTRA "Installing C library"

    CT_DoExecLog ALL                    \

    make CROSS=${CT_TARGET}-            \

         PREFIX="${CT_SYSROOT_DIR}/"    \

         STRIPTOOL=true                 \

         ${CT_LIBC_UCLIBC_VERBOSITY}    \

         install

    CT_EndStep

}

# This function is used to install those components needing the final C compiler

do_libc_finish() {

    :

}

# Initialises the .config file to sensible values

# $1: original file

# $2: munged file

mungeuClibcConfig() {

    src_config_file="$1"

    dst_config_file="$2"

    munge_file="${CT_BUILD_DIR}/munge-uClibc-config.sed"

    # Start with a fresh file

    rm -f "${munge_file}"

    touch "${munge_file}"

    # Do it all in a sub-shell, it's easier to redirect output

    (

    # Hack our target in the config file.

    case "${CT_ARCH}:${CT_ARCH_BITNESS}" in

        x86:32)      arch=i386;;

        x86:64)      arch=x86_64;;

        sh:32)       arch="sh";;

        sh:64)       arch="sh64";;

        blackfin:32) arch="bfin";;

        *)           arch="${CT_ARCH}";;

    esac

    # Also remove stripping: its the responsibility of the

    # firmware builder to strip or not.

    cat <<-ENDSED

		s/^(TARGET_.*)=y$/# \\1 is not set/

		s/^# TARGET_${arch} is not set/TARGET_${arch}=y/

		s/^TARGET_ARCH=".*"/TARGET_ARCH="${arch}"/

		s/.*(DOSTRIP).*/# \\1 is not set/

		ENDSED

    # Ah. We may one day need architecture-specific handler here...

    if [ "${CT_ARCH}" = "arm" ]; then

        # Hack the ARM {E,O}ABI into the config file

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

            cat <<-ENDSED

				s/.*(CONFIG_ARM_OABI).*/# \\1 is not set/

				s/.*(CONFIG_ARM_EABI).*/\\1=y/

				ENDSED

        else

            cat <<-ENDSED

				s/.*(CONFIG_ARM_OABI).*/\\1=y/

				s/.*(CONFIG_ARM_EABI).*/# \\1 is not set/

				ENDSED

        fi

    fi

    # Accomodate for old and new uClibc versions, where the

    # way to select between big/little endian has changed

    case "${CT_ARCH_BE},${CT_ARCH_LE}" in

        y,) cat <<-ENDSED

				s/.*(ARCH_LITTLE_ENDIAN).*/# \\1 is not set/

				s/.*(ARCH_BIG_ENDIAN).*/\\1=y/

				s/.*(ARCH_WANTS_LITTLE_ENDIAN).*/# \\1 is not set/

				s/.*(ARCH_WANTS_BIG_ENDIAN).*/\\1=y/

				ENDSED

        ;;

        ,y) cat <<-ENDSED

				s/.*(ARCH_LITTLE_ENDIAN).*/\\1=y/

				s/.*(ARCH_BIG_ENDIAN).*/# \\1 is not set/

				s/.*(ARCH_WANTS_LITTLE_ENDIAN).*/\\1=y/

				s/.*(ARCH_WANTS_BIG_ENDIAN).*/# \\1 is not set/

				ENDSED

        ;;

    esac

    # Accomodate for old and new uClibc version, where the

    # way to select between hard/soft float has changed

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

        y,) cat <<-ENDSED

				s/^[^_]*(HAS_FPU).*/\\1=y/

				s/.*(UCLIBC_HAS_FPU).*/\\1=y/

				ENDSED

            ;;

        ,y) cat <<-ENDSED

				s/^[^_]*(HAS_FPU).*/\\# \\1 is not set/

				s/.*(UCLIBC_HAS_FPU).*/# \\1 is not set/

				ENDSED

            ;;

    esac

    # Change paths to work with crosstool-NG

    # From http://www.uclibc.org/cgi-bin/viewcvs.cgi?rev=16846&view=rev

    #  " we just want the kernel headers, not the whole kernel source ...

    #  " so people may need to update their paths slightly

    quoted_kernel_source=$(echo "${CT_HEADERS_DIR}" | sed -r -e 's,/include/?$,,; s,/,\\/,g;')

    quoted_headers_dir=$(echo "${CT_HEADERS_DIR}" | sed -r -e 's,/,\\/,g;')

    # CROSS_COMPILER_PREFIX is left as is, as the CROSS parameter is forced on the command line

    # DEVEL_PREFIX is left as '/usr/' because it is post-pended to $PREFIX, wich is the correct value of ${PREFIX}/${TARGET}

    # Some (old) versions of uClibc use KERNEL_SOURCE (which is _wrong_), and

    # newer versions use KERNEL_HEADERS (which is right).

    cat <<-ENDSED

		s/^DEVEL_PREFIX=".*"/DEVEL_PREFIX="\\/usr\\/"/

		s/^RUNTIME_PREFIX=".*"/RUNTIME_PREFIX="\\/"/

		s/^SHARED_LIB_LOADER_PREFIX=.*/SHARED_LIB_LOADER_PREFIX="\\/lib\\/"/

		s/^KERNEL_SOURCE=".*"/KERNEL_SOURCE="${quoted_kernel_source}"/

		s/^KERNEL_HEADERS=".*"/KERNEL_HEADERS="${quoted_headers_dir}"/

		s/^UCLIBC_DOWNLOAD_PREGENERATED_LOCALE=y/\\# UCLIBC_DOWNLOAD_PREGENERATED_LOCALE is not set/

		ENDSED

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

        if grep UCLIBC_EXTRA_CFLAGS extra/Configs/Config.in >/dev/null 2>&1; then

            # Good, there is special provision for such things as -pipe!

            cat <<-ENDSED

				s/^(UCLIBC_EXTRA_CFLAGS=".*)"$/\\1 -pipe"/

				ENDSED

        else

            # Hack our -pipe into WARNINGS, which will be internally incorporated to

            # CFLAGS. This a dirty hack, but yet needed

            cat <<-ENDSED

				s/^(WARNINGS=".*)"$/\\1 -pipe"/

				ENDSED

        fi

    fi

    # 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; besides,

    # crosstool downloads them as part of getandpatch.sh.

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

        cat <<-ENDSED

			s/^# UCLIBC_HAS_LOCALE is not set/UCLIBC_HAS_LOCALE=y\\

			UCLIBC_PREGENERATED_LOCALE_DATA=y\\

			# UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA is not set\\

			# UCLIBC_HAS_XLOCALE is not set/

			ENDSED

    fi

    # WCHAR support

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

        cat <<-ENDSED

			s/^.*UCLIBC_HAS_WCHAR.*/UCLIBC_HAS_WCHAR=y/

			ENDSED

    else

        cat <<-ENDSED

			s/^.*UCLIBC_HAS_WCHAR.*/UCLIBC_HAS_WCHAR=n/

			ENDSED

    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

        cat <<-ENDSED

			s/^# DO_C99_MATH is not set/DO_C99_MATH=y/

			s/^# UCLIBC_CTOR_DTOR is not set/UCLIBC_CTOR_DTOR=y/

			s/^# UCLIBC_HAS_GNU_GETOPT is not set/UCLIBC_HAS_GNU_GETOPT=y/

			ENDSED

    fi

    # Push the threading model

    # Note: we take into account all of the .28, .29, .30 and .31

    #       versions, here. Even snapshots with NPTL.

    case "${CT_THREADS}:${CT_LIBC_UCLIBC_LNXTHRD}" in

        none:)

            cat <<-ENDSED

				s/^UCLIBC_HAS_THREADS=y/# UCLIBC_HAS_THREADS is not set/

				s/^LINUXTHREADS_OLD=y/# LINUXTHREADS_OLD is not set/

				s/^LINUXTHREADS_NEW=y/# LINUXTHREADS_NEW is not set/

				s/^UCLIBC_HAS_THREADS_NATIVE=y/# UCLIBC_HAS_THREADS_NATIVE is not set/

				ENDSED

            ;;

        linuxthreads:old)

            cat <<-ENDSED

				s/^# UCLIBC_HAS_THREADS is not set/UCLIBC_HAS_THREADS=y/

				s/^# LINUXTHREADS_OLD is not set/LINUXTHREADS_OLD=y/

				s/^LINUXTHREADS_NEW=y/# LINUXTHREADS_NEW is not set/

				s/^UCLIBC_HAS_THREADS_NATIVE=y/# UCLIBC_HAS_THREADS_NATIVE is not set/

				ENDSED

            ;;

        linuxthreads:new)

            cat <<-ENDSED

				s/^# UCLIBC_HAS_THREADS is not set/UCLIBC_HAS_THREADS=y/

				s/^LINUXTHREADS_OLD=y/# LINUXTHREADS_OLD is not set/

				s/^# LINUXTHREADS_NEW is not set/LINUXTHREADS_NEW=y/

				s/^UCLIBC_HAS_THREADS_NATIVE=y/# UCLIBC_HAS_THREADS_NATIVE is not set/

				ENDSED

            ;;

        nptl:)

            cat <<-ENDSED

				s/^HAS_NO_THREADS=y/# HAS_NO_THREADS is not set/

				s/^UCLIBC_HAS_THREADS=y/# UCLIBC_HAS_THREADS is not set/

				s/^LINUXTHREADS_OLD=y/# LINUXTHREADS_OLD is not set/

				s/^LINUXTHREADS_NEW=y/# LINUXTHREADS_NEW is not set/

				s/^# UCLIBC_HAS_THREADS_NATIVE is not set/UCLIBC_HAS_THREADS_NATIVE=y/

				ENDSED

            ;;

        *)

            CT_Abort "Incorrect thread settings: CT_THREADS='${CT_THREAD}' CT_LIBC_UCLIBC_LNXTHRD='${CT_LIBC_UCLIBC_LNXTHRD}'"

            ;;

    esac

    # Always build the libpthread_db

    cat <<-ENDSED

		s/^# PTHREADS_DEBUG_SUPPORT is not set.*/PTHREADS_DEBUG_SUPPORT=y/

		ENDSED

    # Force on debug options if asked for

    case "${CT_LIBC_UCLIBC_DEBUG_LEVEL}" in

      0)

        cat <<-ENDSED

			s/^DODEBUG=y/# DODEBUG is not set/

			s/^DODEBUG_PT=y/# DODEBUG_PT is not set/

			s/^DOASSERTS=y/# DOASSERTS is not set/

			s/^SUPPORT_LD_DEBUG=y/# SUPPORT_LD_DEBUG is not set/

			s/^SUPPORT_LD_DEBUG_EARLY=y/# SUPPORT_LD_DEBUG_EARLY is not set/

			s/^UCLIBC_MALLOC_DEBUGGING=y/# UCLIBC_MALLOC_DEBUGGING is not set/

			ENDSED

        ;;

      1)

        cat <<-ENDSED

			s/^# DODEBUG is not set.*/DODEBUG=y/

			s/^DODEBUG_PT=y/# DODEBUG_PT is not set/

			s/^DOASSERTS=y/# DOASSERTS is not set/

			s/^SUPPORT_LD_DEBUG=y/# SUPPORT_LD_DEBUG is not set/

			s/^SUPPORT_LD_DEBUG_EARLY=y/# SUPPORT_LD_DEBUG_EARLY is not set/

			s/^UCLIBC_MALLOC_DEBUGGING=y/# UCLIBC_MALLOC_DEBUGGING is not set/

			ENDSED

        ;;

      2)

        cat <<-ENDSED

			s/^# DODEBUG is not set.*/DODEBUG=y/

			s/^# DODEBUG_PT is not set.*/DODEBUG_PT=y/

			s/^# DOASSERTS is not set.*/DOASSERTS=y/

			s/^# SUPPORT_LD_DEBUG is not set.*/SUPPORT_LD_DEBUG=y/

			s/^# SUPPORT_LD_DEBUG_EARLY is not set.*/SUPPORT_LD_DEBUG_EARLY=y/

			s/^# UCLIBC_MALLOC_DEBUGGING is not set/UCLIBC_MALLOC_DEBUGGING=y/

			ENDSED

        ;;

    esac

    # And now, this is the end

    ) >>"${munge_file}"

    sed -r -f "${munge_file}" "${src_config_file}" >"${dst_config_file}"

}