I hope I am in the right place, if not please direct me ! I have found: AC_CHECK_ALIGNOF (type, [includes = ‘AC_INCLUDES_DEFAULT’]) which is quite lovely, as far as it goes... but it does not appear to tell me the maximum possible alignment. Of course gcc gives __BIGGEST_ALIGNMENT__ for this. And I guess other compilers do something similar... ...but I cannot help feeling that autoconf should cover this, but if it does, I have failed to find where :-( Am I looking in the wrong place ? Is there a standard spell for this ? Thanks, Chris _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf