On 03/15/2013 02:19 AM, Zack Weinberg wrote: > 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:
although you didn't ask: aio.h does not need to be probed for: unistd.h defines _POSIX_ASYNCHRONOUS_IO when it's available. See <http://pubs.opengroup.org/onlinepubs/007904875/basedefs/unistd.h.html> for some other features that don't require autoconf to check for, sys/mman.h is in the same category. With respect to your comment on identifiers with leading underscore: to be conformant to e.g. C89 standards, an implementation must not define anything without said leading underscore, but in cases where the non-standard functionality is required to implement standard-mandated functionality, it's easiest to have it available with a leading underscore. In case you still need it, I could check AIX 6.1 for any header you want to know about or provide an ls -R of /usr/include, although some of that are packaged products and e.g. aio requires the installation of an optional kernel extension package although I'm not sure if the header is available even when said package is not installed. Regards, Thomas -- Thomas Jahns DKRZ GmbH, Department: Application software Deutsches Klimarechenzentrum Bundesstraße 45a D-20146 Hamburg Phone: +49-40-460094-151 Fax: +49-40-460094-270 Email: Thomas Jahns <ja...@dkrz.de>
smime.p7s
Description: S/MIME Cryptographic Signature
_______________________________________________ Autoconf mailing list Autoconf@gnu.org https://lists.gnu.org/mailman/listinfo/autoconf
