Re: ac_cv_sizeof_X, et al.

[Eric Blake]

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According to Philip Prindeville on 7/15/2008 12:22 AM:
|
| Well, it kind of begs the question:  if ac_sizeof_long_long_int !=
| ac_sizeof_long_long_unsigned_int, then what happens when you assign a
| LONGLONG_MAX to a signed long long, and then copy that into an unsigned
| long long, or vice versa...

At one point, I proposed modifying autoconf to require both types, or else
claim that neither type exists, because there was an actual platform
(Tandem/NSK) reported by Matthew Woehlke that actually had 32-bit unsigned
long long and 64-bit long long.  Paul Eggert declined the idea at the
time, but perhaps it needs revisiting?  At any rate, M4 gives an example
of how to do this:

http://git.savannah.gnu.org/gitweb/?p=m4.git;a=commitdiff;h=7db3ae3

|>
|> If <stdint.h> and <inttypes.h> were available everywhere then much of
|> this gobbly gook could go away.  Maybe in another 10 years or so that
|> will be the case.

You may want to consider using gnulib, which provides a replacement
<stdint.h> and <inttypes.h> and takes care of all of the type definitions
in those two headers (it does not yet provide a <sys/types.h> replacement,
with additional useful types).

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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