skaller wrote:
On Sat, 2007-09-15 at 11:09 +0200, Sven Panne wrote:
On Friday 14 September 2007 16:33, Robert Andersson wrote:
stdint.h seems to be unavailable on solaris 9. Looking at the
rts/posix/OSMem.c file we find
/* no C99 header stdint.h on OpenBSD? */
#if defined(openbsd_HOST_OS)
typedef unsigned long my_uintptr_t;
#else
#include <stdint.h>
typedef uintptr_t my_uintptr_t;
#endif
Uh, oh... Using long doesn't look very 64bit-safe (it could be int, long, long
long, who knows?). IIRC some systems without <stdint.h> provide at least
<inttypes.h>, so we should perhaps use this as a fallback?
The RIGHT way to do this is rather messy .. but there is only
one right way to do it.
1. Measure the size (and alignment, while at it) of all the
integer types. (trial execute and run).
We already do this. Incedentally, the GHC RTS does provide a full
complement of explicitly-sized types: Stg{Int,Word}{8,16,32,64} which are
correct on all the platforms we currently support. The header that defines
them currently makes some assumptions (e.g. char is 8 bits), but that's
only because we're a bit lazy; it wouldn't be hard to fix it if we need to
port to a platform on which it isn't true.
I've just fixed OSMem.c to use StgWord (the pointer-sized integral type)
instead of my_uintptr_t, I'm validating the fix now.
Cheers,
Simon
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