# This file adds the function to build the gcc C compiler

# Copyright 2007 Yann E. MORIN

# Licensed under the GPL v2. See COPYING in the root of this package

# Download gcc

do_cc_get() {

    # Ah! gcc folks are kind of 'different': they store the tarballs in

    # subdirectories of the same name! That's because gcc is such /crap/ that

    # it is such /big/ that it needs being splitted for distribution! Sad. :-(

    # Arrgghh! Some of those versions does not follow this convention:

    # gcc-3.3.3 lives in releases/gcc-3.3.3, while gcc-2.95.* isn't in a

    # subdirectory! You bastard!

    CT_GetFile "gcc-${CT_CC_VERSION}"   \

               {ftp,http}://ftp.gnu.org/gnu/gcc{,{,/releases}/gcc-${CT_CC_VERSION}}

}

# Extract gcc

do_cc_extract() {

    CT_Extract "gcc-${CT_CC_VERSION}"

    CT_Patch "gcc-${CT_CC_VERSION}"

}

#------------------------------------------------------------------------------

# Core gcc pass 1

do_cc_core_pass_1() {

    # If we're building for bare metal, build the static core gcc,

    # with libgcc.

    # In case we're not bare metal, and we're NPTL, build the static core gcc.

    # In any other case, do nothing.

    case "${CT_BARE_METAL},${CT_THREADS}" in

        y,*)    do_cc_core mode=baremetal build_libgcc=yes;;

        ,nptl)  do_cc_core mode=static build_libgcc=no;;

        *)      ;;

    esac

}

# Core gcc pass 2

do_cc_core_pass_2() {

    # In case we're building for bare metal, do nothing, we already have

    # our compiler.

    # In case we're NPTL, build the shared core gcc and the target libgcc.

    # In any other case, build the static core gcc and, if using gcc-4.3+,

    # also build the target libgcc.

    case "${CT_BARE_METAL},${CT_THREADS}" in

        y,*)    ;;

        ,nptl)

            do_cc_core mode=shared build_libgcc=yes

            ;;

        *)  if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then

                do_cc_core mode=static build_libgcc=yes

            else

                do_cc_core mode=static build_libgcc=no

            fi

            ;;

    esac

}

#------------------------------------------------------------------------------

# Build core gcc

# This function is used to build both the static and the shared core C conpiler,

# with or without the target libgcc. We need to know wether:

#  - we're building static, shared or bare metal: mode=[static|shared|baremetal]

#  - we need to build libgcc or not             : build_libgcc=[yes|no]

# Usage: do_cc_core_static mode=[static|shared|baremetal] build_libgcc=[yes|no]

do_cc_core() {

    local mode

    local build_libgcc

    local core_prefix_dir

    local extra_config

    local lang_opt

    eval $1

    eval $2

    CT_TestOrAbort "Internal Error: 'mode' must either 'static', 'shared' or 'baremetal', not '${mode:-(empty)}'" "${mode}" = "static" -o "${mode}" = "shared" -o "${mode}" = "baremetal"

    CT_TestOrAbort "Internal Error: 'build_libgcc' must be either 'yes' or 'no', not '${build_libgcc:-(empty)}'" "${build_libgcc}" = "yes" -o "${build_libgcc}" = "no"

    # In normal conditions, ( "${mode}" = "shared" ) implies

    # ( "${build_libgcc}" = "yes" ), but I won't check for that

    CT_DoStep INFO "Installing ${mode} core C compiler"

    mkdir -p "${CT_BUILD_DIR}/build-cc-core-${mode}"

    cd "${CT_BUILD_DIR}/build-cc-core-${mode}"

    lang_opt=c

    case "${mode}" in

        static)

            core_prefix_dir="${CT_CC_CORE_STATIC_PREFIX_DIR}"

            extra_config="${extra_config} --with-newlib --enable-threads=no --disable-shared"

            copy_headers=y

            ;;

        shared)

            core_prefix_dir="${CT_CC_CORE_SHARED_PREFIX_DIR}"

            extra_config="${extra_config} --enable-shared"

            copy_headers=y

            ;;

        baremetal)

            core_prefix_dir="${CT_PREFIX_DIR}"

            extra_config="${extra_config} --with-newlib --enable-threads=no --disable-shared"

            [ "${CT_CC_LANG_CXX}" = "y" ] && lang_opt="${lang_opt},c++"

            copy_headers=n

            ;;

    esac

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

        CT_DoLog DEBUG "Copying headers to install area of bootstrap gcc, so it can build libgcc2"

        CT_DoExecLog ALL mkdir -p "${core_prefix_dir}/${CT_TARGET}/include"

        CT_DoExecLog ALL cp -r "${CT_HEADERS_DIR}"/* "${core_prefix_dir}/${CT_TARGET}/include"

    fi

    CT_DoLog EXTRA "Configuring ${mode} core C compiler"

    extra_config="${extra_config} ${CT_ARCH_WITH_ARCH}"

    extra_config="${extra_config} ${CT_ARCH_WITH_ABI}"

    extra_config="${extra_config} ${CT_ARCH_WITH_CPU}"

    extra_config="${extra_config} ${CT_ARCH_WITH_TUNE}"

    extra_config="${extra_config} ${CT_ARCH_WITH_FPU}"

    extra_config="${extra_config} ${CT_ARCH_WITH_FLOAT}"

    [ "${CT_GMP_MPFR}" = "y" ] && extra_config="${extra_config} --with-gmp=${CT_PREFIX_DIR} --with-mpfr=${CT_PREFIX_DIR}"

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

        extra_config="${extra_config} --enable-__cxa_atexit"

    else

        extra_config="${extra_config} --disable-__cxa_atexit"

    fi

    CT_DoLog DEBUG "Extra config passed: '${extra_config}'"

    # Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)

    CC_FOR_BUILD="${CT_BUILD}-gcc"                  \

    CFLAGS="${CT_CFLAGS_FOR_HOST}"                  \

    CT_DoExecLog ALL                                \

    "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure"  \

        --build=${CT_BUILD}                         \

        --host=${CT_HOST}                           \

        --target=${CT_TARGET}                       \

        --prefix="${core_prefix_dir}"               \

        --with-local-prefix="${CT_SYSROOT_DIR}"     \

        --disable-multilib                          \

        ${CC_CORE_SYSROOT_ARG}                      \

        ${extra_config}                             \

        --disable-nls                               \

        --enable-symvers=gnu                        \

        --enable-languages="${lang_opt}"            \

        --enable-target-optspace                    \

        ${CT_CC_CORE_EXTRA_CONFIG}

    if [ "${build_libgcc}" = "yes" ]; then

        # HACK: we need to override SHLIB_LC from gcc/config/t-slibgcc-elf-ver or

        # gcc/config/t-libunwind so -lc is removed from the link for

        # libgcc_s.so, as we do not have a target -lc yet.

        # This is not as ugly as it appears to be ;-) All symbols get resolved

        # during the glibc build, and we provide a proper libgcc_s.so for the

        # cross toolchain during the final gcc build.

        #

        # As we cannot modify the source tree, nor override SHLIB_LC itself

        # during configure or make, we have to edit the resultant

        # gcc/libgcc.mk itself to remove -lc from the link.

        # This causes us to have to jump through some hoops...

        #

        # To produce libgcc.mk to edit we firstly require libiberty.a,

        # so we configure then build it.

        # Next we have to configure gcc, create libgcc.mk then edit it...

        # So much easier if we just edit the source tree, but hey...

        if [ ! -f "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/gcc/BASE-VER" ]; then

            CT_DoExecLog ALL make configure-libiberty

            CT_DoExecLog ALL make ${PARALLELMFLAGS} -C libiberty libiberty.a

            CT_DoExecLog ALL make configure-gcc configure-libcpp

            CT_DoExecLog ALL make ${PARALLELMFLAGS} all-libcpp

        else

            CT_DoExecLog ALL make configure-gcc configure-libcpp configure-build-libiberty

            CT_DoExecLog ALL make ${PARALLELMFLAGS} all-libcpp all-build-libiberty

        fi

        # HACK: gcc-4.2 uses libdecnumber to build libgcc.mk, so build it here.

        if [ -d "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/libdecnumber" ]; then

            CT_DoExecLog ALL make configure-libdecnumber

            CT_DoExecLog ALL make ${PARALLELMFLAGS} -C libdecnumber libdecnumber.a

        fi

        # Starting with GCC 4.3, libgcc.mk is no longer built,

        # and libgcc.mvars is used instead.

        if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then

            libgcc_rule="libgcc.mvars"

            build_rules="all-gcc all-target-libgcc"

            install_rules="install-gcc install-target-libgcc"

        else

            libgcc_rule="libgcc.mk"

            build_rules="all-gcc"

            install_rules="install-gcc"

        fi

        CT_DoExecLog ALL make ${PARALLELMFLAGS} -C gcc ${libgcc_rule}

        sed -r -i -e 's@-lc@@g' gcc/${libgcc_rule}

    else # build_libgcc

            build_rules="all-gcc"

            install_rules="install-gcc"

    fi   # ! build libgcc

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

        CT_DoLog EXTRA "Building libiberty"

        CT_DoExecLog ALL make ${PARALLELMFLAGS} all-build-libiberty

    fi

    CT_DoLog EXTRA "Building ${mode} core C compiler"

    CT_DoExecLog ALL make ${PARALLELMFLAGS} ${build_rules}

    CT_DoLog EXTRA "Installing ${mode} core C compiler"

    CT_DoExecLog ALL make ${install_rules}

    CT_EndStep

}

#------------------------------------------------------------------------------

# Build final gcc

do_cc() {

    # If building for bare metal, nothing to be done here, the static core conpiler is enough!

    [ "${CT_BARE_METAL}" = "y" ] && return 0

    CT_DoStep INFO "Installing final compiler"

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

    cd "${CT_BUILD_DIR}/build-cc"

    CT_DoLog EXTRA "Configuring final compiler"

    # Enable selected languages

    lang_opt="c"

    [ "${CT_CC_LANG_CXX}" = "y"      ] && lang_opt="${lang_opt},c++"

    [ "${CT_CC_LANG_FORTRAN}" = "y"  ] && lang_opt="${lang_opt},fortran"

    [ "${CT_CC_LANG_ADA}" = "y"      ] && lang_opt="${lang_opt},ada"

    [ "${CT_CC_LANG_JAVA}" = "y"     ] && lang_opt="${lang_opt},java"

    [ "${CT_CC_LANG_OBJC}" = "y"     ] && lang_opt="${lang_opt},objc"

    [ "${CT_CC_LANG_OBJCXX}" = "y"   ] && lang_opt="${lang_opt},obj-c++"

    CT_Test "Building ADA language is not yet supported. Will try..." "${CT_CC_LANG_ADA}" = "y"

    CT_Test "Building Objective-C language is not yet supported. Will try..." "${CT_CC_LANG_OBJC}" = "y"

    CT_Test "Building Objective-C++ language is not yet supported. Will try..." "${CT_CC_LANG_OBJCXX}" = "y"

    CT_Test "Building ${CT_CC_LANG_OTHERS//,/ } language(s) is not yet supported. Will try..." -n "${CT_CC_LANG_OTHERS}"

    lang_opt=$(echo "${lang_opt},${CT_CC_LANG_OTHERS}" |sed -r -e 's/,+/,/g; s/,*$//;')

    extra_config="--enable-languages=${lang_opt}"

    extra_config="${extra_config} --disable-multilib"

    extra_config="${extra_config} ${CT_ARCH_WITH_ARCH}"

    extra_config="${extra_config} ${CT_ARCH_WITH_ABI}"

    extra_config="${extra_config} ${CT_ARCH_WITH_CPU}"

    extra_config="${extra_config} ${CT_ARCH_WITH_TUNE}"

    extra_config="${extra_config} ${CT_ARCH_WITH_FPU}"

    extra_config="${extra_config} ${CT_ARCH_WITH_FLOAT}"

    [ "${CT_SHARED_LIBS}" = "y" ]                   || extra_config="${extra_config} --disable-shared"

    [ "${CT_GMP_MPFR}" = "y" ]                      && extra_config="${extra_config} --with-gmp=${CT_PREFIX_DIR} --with-mpfr=${CT_PREFIX_DIR}"

    [ -n "${CT_CC_PKGVERSION}" ]                    && extra_config="${extra_config} --with-pkgversion=${CT_CC_PKGVERSION}"

    [ -n "${CT_CC_BUGURL}" ]                        && extra_config="${extra_config} --with-bugurl=${CT_CC_BUGURL}"

    [ "${CT_CC_SJLJ_EXCEPTIONS_USE}" = "y" ]        && extra_config="${extra_config} --enable-sjlj-exceptions"

    [ "${CT_CC_SJLJ_EXCEPTIONS_DONT_USE}" = "y" ]   && extra_config="${extra_config} --disable-sjlj-exceptions"

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

        extra_config="${extra_config} --enable-__cxa_atexit"

    else

        extra_config="${extra_config} --disable-__cxa_atexit"

    fi

    CT_DoLog DEBUG "Extra config passed: '${extra_config}'"

    # --enable-symvers=gnu really only needed for sh4 to work around a

    # detection problem only matters for gcc-3.2.x and later, I think.

    # --disable-nls to work around crash bug on ppc405, but also because

    # embedded systems don't really need message catalogs...

    CC_FOR_BUILD="${CT_BUILD}-gcc"                  \

    CFLAGS="${CT_CFLAGS_FOR_HOST}"                  \

    CFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}"         \

    CXXFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}"       \

    LDFLAGS_FOR_TARGET="${CT_TARGET_LDFLAGS}"       \

    CT_DoExecLog ALL                                \

    "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure"  \

        --build=${CT_BUILD}                         \

        --host=${CT_HOST}                           \

        --target=${CT_TARGET}                       \

        --prefix="${CT_PREFIX_DIR}"                 \

        ${CC_SYSROOT_ARG}                           \

        ${extra_config}                             \

        --with-local-prefix="${CT_SYSROOT_DIR}"     \

        --disable-nls                               \

        --enable-threads=posix                      \

        --enable-symvers=gnu                        \

        --enable-c99                                \

        --enable-long-long                          \

        --enable-target-optspace                    \

        ${CT_CC_EXTRA_CONFIG}

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

        CT_DoLog EXTRA "Building libiberty"

        CT_DoExecLog ALL make ${PARALLELMFLAGS} all-build-libiberty

    fi

    CT_DoLog EXTRA "Building final compiler"

    CT_DoExecLog ALL make ${PARALLELMFLAGS} all

    CT_DoLog EXTRA "Installing final compiler"

    CT_DoExecLog ALL make install

    # Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able

    # to call the C compiler with the same, somewhat canonical name.

    CT_DoExecLog ALL ln -sv "${CT_TARGET}"-gcc "${CT_PREFIX_DIR}/bin/${CT_TARGET}"-cc

    CT_EndStep

}