Hi Peter,

Peter TB Brett <peter@peter-b.co.uk> writes:

> It is not currently possible to compile Guile 2.0.11 for Windows x64
> (in particular 64-bit Windows running on the x86-64 arch).
>
> Most operating systems' C libraries for x86-64 use an "LP64" model,
> where sizeof(long int) == sizeof(void *) == 8.
>
> However, for backwards-compatibility reasons, Windows uses an "LLP64"
> model, where sizeof(long long int) == sizeof(void *) == 8 and
> sizeof(long int) == 4.
>
> Guile 2.0.11 can't cope with this; the libguile build fails due to
> this code:

I've attached a patch that attempts to address this issue by using
'long' as the scm_t_inum type.  So, fixnums will be limited to 30 bits
on LLP64 systems.  We can't easily avoid this while using GMP's mpz API,
since the mpz_*_si functions except longs and there are no analogous
functions that accept larger C integer types.

Can you test this patch and report back?

     Thanks,
       Mark