if [ "$(installed_version gcc)" != "$VERSION" ]; then
  message "${PROBLEM_COLOR}Installed version of gcc is $(installed_version gcc), not $VERSION!"
  message "Update gcc first.${DEFAULT_COLOR}"
  return 1;
fi
default_pre_build                &&
cd $BUILD_DIRECTORY              &&
unpack $SOURCE2 ${MD5[1]}        &&
unpack $SOURCE3 ${MD5[2]}        &&
mk_source_dir  $SOURCE_DIRECTORY.bld
