AC_MSG_CHECKING([whether to include error messages])
AC_ARG_ENABLE([error_messages],
AC_MSG_CHECKING([whether to include error messages])
AC_ARG_ENABLE([error_messages],
[ENABLE_ERROR_MESSAGES=$enableval],
[ENABLE_ERROR_MESSAGES=yes])
AC_MSG_RESULT([$ENABLE_ERROR_MESSAGES])
[ENABLE_ERROR_MESSAGES=$enableval],
[ENABLE_ERROR_MESSAGES=yes])
AC_MSG_RESULT([$ENABLE_ERROR_MESSAGES])