- Add some features to autoconf that makes it cleaner and faster
- Modernize some of the autoconf macros
- Update compiler.h with some C23 features
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
The POSIX names for these functions are htole*(). Use those
preferentially.
Speed up autoconf by allowing early-out during alternative function
searches.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>