On Wednesday 01 April 2009, Roland McGrath wrote: > > Actually, gcc does have the _LP64 and __SIZEOF_POINTER__ macros (as well > > as __CHAR_BIT__), although I don't know how far back it does have that. > > If it has been with us for long enough it might be possible to > > switch over to using panarch macros. For user space, we also need to consider non-gcc compilers that could have a different set of macros. As long as we don't start relying on any new ones besides those we already use (__x86_64__, __s390x__, __powerpc64__, __mips64, __arch64__), we at least don't break anything accidentally. > Worst case the oldest compilers had <limits.h> and > "#if ULONG_MAX == 0xffffffffUL", though I wouldn't like > myself to be using a setup where <limits.h> got pulled in. That would of course work with non-gcc, but we are really not allowed to pull in <limits.h> from places like <types.h> where it would be needed then. Arnd <>< -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
