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bug#22406: Cannot compile for Windows x64 due to LLP64 model
From: |
Peter TB Brett |
Subject: |
bug#22406: Cannot compile for Windows x64 due to LLP64 model |
Date: |
Tue, 19 Jan 2016 13:50:17 +0000 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 |
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:
> static SCM
> scm_i_inum2big (scm_t_inum x)
> {
> /* Return a newly created bignum initialized to X. */
> SCM z = make_bignum ();
> #if SIZEOF_VOID_P == SIZEOF_LONG
> mpz_init_set_si (SCM_I_BIG_MPZ (z), x);
> #else
> /* Note that in this case, you'll also have to check all mpz_*_ui and
> mpz_*_si invocations in Guile. */
> #error creation of mpz not implemented for this inum size
> #endif
> return z;
> }
http://git.savannah.gnu.org/cgit/guile.git/tree/libguile/numbers.c?id=v2.0.11#n272
Some work appears to be required before using 64-bit Guile on Windows
x64 is possible.
--
Dr Peter Brett <address@hidden>
- bug#22406: Cannot compile for Windows x64 due to LLP64 model,
Peter TB Brett <=