Re: coreutils 6.6 HP-UX build error

[Paul Eggert]

Ben Pfaff <address@hidden> writes:

> I don't understand this rationale.  C89 requires that the switch
> expression be of integral type.  For C89 compilers with the long
> long int extension, a long long int is an integral type

No, because there's no standard for the "long long int" extension in
C89.  A conforming C89 compiler can support every feature of C99 long
long int except for switch().  Such a compiler will still execute
every C89 program correctly, so the implementation conforms to C89.

For example, some conforming C89 systems have long long but use %Ld
rather than %lld for printf formats; that also conforms to C89 (but
not C99, obviously).

> Are there actual implementations that support long long int but
> not its use as a switch expression?

Yes, apparently the HP-UX compiler in question is like this.