# check for required binaries
REQD_BINS=""
which ldconfig >/dev/null 2>&1 || type ldconfig >/dev/null 2>&1 || REQD_BINS="ldconfig,${REQD_BINS}"
if [ ! -z "${REQD_BINS}" ]; then
  echo -e `basename ${0}`: "Required binaries (${REQD_BINS}\010) are not present."
  exit 1
fi

if [ ! -f ./configure ]; then
  echo ">> autoreconf"
  autoreconf -vfi
else
  echo ">> ./configure"
fi

SOURCE_DIR=`echo "${BUILD_DIR}" | sed 's/.builddir/.sourcedir/'`
mv ../"${BUILD_DIR}" ../"${SOURCE_DIR}" 1>/dev/null 2>&1
BUILD_DIR="_gcc_bootstrap"
if [ -d ../"${BUILD_DIR}" ]; then
  rm -rf ../"${BUILD_DIR}"
fi
mkdir ../"${BUILD_DIR}" && cd ../"${BUILD_DIR}"

_gcc_more_options="--enable-stage1-languages=c,c++,fortran"
_gcc_disable_bootstrap="no"
if [ "${_gcc_disable_bootstrap}" = "yes" ]; then
  _gcc_more_options="--disable-bootstrap"
fi

../"${SOURCE_DIR}"/configure --prefix=/usr --sysconfdir=/etc --mandir=/usr/share/man \
--build=${ARCH_NAME}-${VENDOR_NAME}-linux-${LIBC_NAME} \
--host=${ARCH_NAME}-${VENDOR_NAME}-linux-${LIBC_NAME} \
--target=${ARCH_NAME}-${VENDOR_NAME}-linux-${LIBC_NAME} \
--enable-languages=c,c++,fortran,java \
`echo "${_gcc_more_options}"` \
--with-cpu=default32 --enable-threads=posix \
--with-system-zlib --with-libiconv-prefix=/usr --without-included-gettext \
--disable-nls --disable-werror --disable-multilib --disable-libssp \
--disable-__cxa_atexit --enable-shared \
--without-gjdoc --enable-libgcj --enable-libgcj-multifile --enable-interpreter \
--disable-libjava-multilib --disable-browser-plugin \
--enable-checking=release ##--disable-checking
##--with-system-libffi
##--disable-build-poststage1-with-cxx

if [ $? -eq 0 ]; then
  cp ./config.log ../_gcc_config_log

  printf "(before)  " > ../_gcc_bootstrap_time && date >> ../_gcc_bootstrap_time
  printf "%s\n" "----------------------------------------------------------------"
  echo "make V=1 2>&1 | tee ../_gcc_bootstrap_log"
  printf "%s\n"	"----------------------------------------------------------------"
  make V=1 2>&1 | tee ../_gcc_bootstrap_log
  printf "(after)   " >> ../_gcc_bootstrap_time && date >> ../_gcc_bootstrap_time

  _stage_curr=`cat ./stage_current 2>/dev/null`
  _stage_last=`cat ./stage_last`
  _stage_final=`cat ./stage_final`
  _error_in_log=`tail -1 ../_gcc_bootstrap_log | grep -i "error"`
  if [ ! -z "${_error_in_log}" ] || \
     [ "${_stage_curr}" != "${_stage_final}" ] || [ "${_stage_curr}" != "${_stage_last}" ]; then
    printf "%s: %s %s." "ERROR" "${_stage_curr}" "bootstrap error"
    printf ">> %s %s\n" "${_stage_curr}" "bootstrap error" >> ../_gcc_bootstrap_time
    echo " Abort."; exit 1
  fi

  mkdir ./"${INSTALL_DIR}"
  INSTALL_PATH=`pwd`/"${INSTALL_DIR}"
  make install DESTDIR="${INSTALL_PATH}" 2>&1 | tee ../_gcc_install_log
  _error_in_log=`tail -1 ../_gcc_install_log | grep "Stop."`
  if [ ! -z "${_error_in_log}" ]; then
    echo "ERROR: 'make install' error. Abort."
    exit 1
  fi
else
  echo "ERROR: './configure' error. Abort."
  exit 1
fi