[PATCH] support for mingw-w64
tg at gmplib.org
Fri Sep 11 14:05:17 CEST 2009
nisse at lysator.liu.se (Niels Möller) writes:
Torbjorn Granlund <tg at gmplib.org> writes:
> * We unfortunately cannot use intptr_t unconditionally, since it is not
> available everywhere we want GMP to work; it is a C99 feature.
> I wonder if size_t could be used instead? While perhaps not elegant,
> it should work. Does anybody see any problem?
Another alternative is ptrdiff_t. My understanding is that this is
fairly portable in both theory and practice.
My undertanding is that sizeof(ptrdiff_t) == sizeof(size_t) should hold
true on any ISO C90 or C99 system. They only differ in signedness.
Perhaps some usages of ptrdiff_t could make use of the sign ("which
sub-object within the objext comnes first in memory?"), but I doubt GMP
I suggest that we either use size_t, or if people think ptrdiff_t make
more sense, use that. But we might as well use a typedef in gmp-impl.h:
typedef size_t gmp_intptr_t;
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