AC_CHECK_FUNC(mmap,,AC_MSG_ERROR(Sorry, you need mmap. If you are reading this, email-me and report this problem and your system description - rafael@riseup.net))
AC_CHECK_FUNC(gettext,,AC_MSG_ERROR(Sorry, you need gettext. If you are reading this, email-me and report this problem and your system description - rafael@riseup.net))