I've been doing research into the cross-platform availability of header files that are commonly probed for in Autoconf scripts. Results so far are here: http://www.owlfolio.org/possibly-useful/notes-on-the-cross-platform-availability-of-header-files/ Based on what I've learned, I have some questions for y'all: 1) What "interesting portability targets" have I left out? I only went back in time as far as FreeBSD 7, and I didn't even try to get my hands on any of the surviving proprietary Unixes; is this too shortsighted? 2) Autoconf currently probes for several of the headers in the "safely assumed to exist everywhere" categories, notably in AC_INCLUDES_DEFAULT. It seems to me that this is unnecessary. Would patches to remove under-the-hood checks for the ubiquitous headers, and deprecate macros that do explicit checks for them, be accepted? 3) It's a little tangential, but don't you think it's about time AC_CHECK_HEADERS stopped doing all its tests two different ways? Thanks, zw _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf