[libvirt] how to print size_t in LGPLv2+ program

libvirt is currently LGPLv2+, but needs to use the printf family of functions to display size_t values, even on mingw where %zu support is not built in. My understanding is that on 64-bit windows, sizeof(long)==4 but sizeof(void*)==8; and if I'm reading http://msdn.microsoft.com/en-us/library/s3f49ktz%28VS.80%29.aspx correctly, then sizeof(size_t) is also 8. Which means you _can't_ use "%lu",(unsigned long)size_t_val. And mingw also lacks support for "%llu",(unsigned long long)size_t_val. So that leaves several options: Is it worth relaxing the license on the *printf-posix family of modules to LGPLv2+ from their current LGPLv3+, or is this too big of a request? Ultimately, this is the nicest - %zu would just work. Is it worth relaxing the license of the inttostr family of modules?. But that is also LGPLv3+, and requires a more careful audit to convert all uses of "%zu",size_t_val into "%s",umaxtostr(size_t_val,buf). Or, since using umaxtostr penalizes 32-bit machines for converting to the 64-bit intermediary, maybe it's worth adding a size_t variant? That, and coreutils has a TODO to remove use of umaxtostr in favor of <inttypes.h> solutions. Finally, within existing LGPLv2+ modules, it is possible for libvirt to manually use "%"PRIuMAX,(uintmax_t)size_t_val everywhere by relying on gnulib's <inttypes.h> replacement, but that's also a painful audit to perform and maintain, and also wastes processor cycles on 32-bit machines for converting to the 64-bit intermediary. What a shame that POSIX omitted an <inttypes.h> PRIu* for size_t. -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org