## check rational bugfix.
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$GUILE_CFLAGS $CPPFLAGS"
AC_MSG_CHECKING(GUILE rational bugfix)
## check rational bugfix.
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$GUILE_CFLAGS $CPPFLAGS"
AC_MSG_CHECKING(GUILE rational bugfix)