#---------------------------------------------------------------------
## GNU Compiler Collection Default CONFIGURE portion.
## Defines the GCC_MULTILIB configuration variable used to tell GCC
## compilers if multi-lib option should be used, e.g. 32-bit runtime
## libraries built in 64-bit environment.
#---------------------------------------------------------------------
function default_configure_gcc ()
{
  MACHINE=$(uname -m)                  &&
  LINK_SO=/lib/ld-linux-x86-64.so.2    &&
  LINK_SO2=/lib64/ld-linux-x86-64.so.2 &&

  if [[ "$MACHINE" = "${HOST%%-*}" ]] && [[ "$MACHINE" = x86_64 ]] && [ -f "$LINK_SO" -o -f "$LINK_SO2" ]; then
    config_query_option GCC_MULTILIB                                                 \
                      'Enable 32-bit libraries in 64-bit system (safe to say "no")?' \
                      n                                                              \
                      '--enable-multilib'                                            \
                      '--disable-multilib'
  fi
}

function default_build_configure_gcc ()
{
    cd ${SOURCE_DIRECTORY}.bld                                &&
    persistent_read gmp GMP_BUILD_ARCH GMP_BUILD_ARCH         &&
    persistent_read mpfr MPFR_BUILD_ARCH MPFR_BUILD_ARCH      &&

    if [[ $GMP_BUILD_ARCH  != ${SMGL_COMPAT_ARCHS[4]}
       || $MPFR_BUILD_ARCH != ${SMGL_COMPAT_ARCHS[4]} ]]; then
      message "${PROBLEM_COLOR}" 1>&2 &&
      message "gmp and/or mpfr have been built with a different archspec, building gcc now" 1>&2 &&
      message "would result in a broken compiler" 1>&2 &&
      message "${DEFAULT_COLOR}" 1>&2
      return 1
    fi                                                        &&

    # install gcc libraries to /lib instead of /lib64
    sedit "s/lib64/lib/" ${SOURCE_DIRECTORY}/gcc/config/i386/linux64.h &&
    if [[ "$GCC_NOLIB64" == 'y' ]]; then
      # tell gcc to target binaries to expect the linker in /lib instead of /lib64
      sedit "s/lib64/lib/" ${SOURCE_DIRECTORY}gcc/config/i386/t-linux64 || return 1
    fi                                                        &&

    if  [[ "$ARCHITECTURE"  ==  "pentium4"  ||
           "$ARCHITECTURE"  ==  "pentium-m"  ]];  then
       CFLAGS=${CFLAGS//-ffast-math/}     &&
       CXXFLAGS=${CXXFLAGS//-ffast-math/} || return 1
    fi  &&

    # fixes seg-fault on libiberty/splay.c in v 4.3.2
    CFLAGS="-O1 $CFLAGS"                                      &&

    OPTS="--build=$HOST $OPTS"                              &&
    if [[ $CROSS_INSTALL == on ]]; then
        OPTS="--host=$HOST $OPTS" || return 1
    fi &&

    PREFIX="${INSTALL_ROOT}/usr" &&
    LIBPATH="${PREFIX}/lib"      &&
    LIBEXECPATH="${PREFIX}/libexec/${SPELL}" &&
    INCLUDEPATH="${LIBPATH}/include" &&
    DATAPATH="${PREFIX}/share/${SPELL}-data/${HOST}" &&

    CFLAGS="$CFLAGS" BOOT_CFLAGS="$CFLAGS" CXXFLAGS="$CXXFLAGS" \
      $SOURCE_DIRECTORY/configure                     \
        --prefix="${PREFIX}"                          \
        --libdir="${LIBPATH}"                         \
        --mandir="${PREFIX}/share/man"                \
        --infodir="${PREFIX}/share/info"              \
        --enable-threads=posix                        \
        --with-system-zlib                            \
        --with-bugurl="http://bugs.sourcemage.org"    \
        $GCC_MULTILIB                                 \
        $OPTS
}

function default_build_make_gcc ()
{
    cd ${SOURCE_DIRECTORY}.bld                                 &&
    make_single                                                &&
    make CFLAGS="$CFLAGS" BOOT_CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" \
        profiledbootstrap-lean &&
    make_normal
}

function default_build_gcc ()
{
    default_build_configure_gcc &&
    default_build_make_gcc
}

#---------------------------------------------------------------------
##
## @params library
##         accepted values: libada libgfortran
##                          libstdc++-v3 libjava
##                          libobjc
##
#---------------------------------------------------------------------
function default_install_gcc ()
{
    if [[ "$1" == "" ]]; then
        message "${PROBLEM_COLOR}default_install_gcc: library unspecified.${DEFAULT_COLOR}"
        return 1
    fi &&
    local LIBRARY   &&

    LIBRARY="$1"    &&

    cd  $SOURCE_DIRECTORY.bld  &&

    make_single  &&

    make -C gcc lang.install-common lang.install-man &&
    make -C $HOST/$LIBRARY install                   &&

    make_normal  &&

    # specs file stuff
    local SPECSDIR=${INSTALL_ROOT}/usr/lib/gcc/$HOST/$VERSION  &&
    if [[ -f $SPELL_DIRECTORY/specs_$SPELL ]]; then
        install $SPELL_DIRECTORY/specs_$SPELL $SPECSDIR/specs-local || return 1
    fi
}