# 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

 }