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Date: Mon, 25 Aug 2003 12:29:06 -0700
From: "Randy.Dunlap" <rddunlap@osdl.org>
To: herbert@13thfloor.at
Cc: linux-kernel@vger.kernel.org
Subject: Re: [OT] sizeof C types ...
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On Mon, 25 Aug 2003 21:13:39 +0200 Herbert P?tzl <herbert@13thfloor.at> wrote:

| 
| Hi Everyone!
| 
| this time not sooo off topic but ...
| 
| anyway, ist there some kind of overview how
| large the basic C types are on the different
| architectures Linux runs on?
| 
| char, short, int, long, long int, long long, ...

>From gcc mailing list today: <quote>

All GCC targets (except perhaps some specialized targets for certain DSPs
and microcontrollers) support 64-bit integers.

Almost all GCC targets are either "ILP32" or "LP64".

For ILP32:
	short is 16 bits
	int, long, pointers are 32 bits
	"long long" is 64 bits

For LP64:
	short is 16 bits
	int is 32 bits
	long, pointers, and "long long" are 64 bits

None of this requires a specific version, as all these types have been
around for a long time.
</quote>

Also see Ch. 10 of the LDD book:
  http://www.xml.com/ldd/chapter/book/ch10.html

--
~Randy   [mantra:  Always include kernel version.]
"Everything is relative."
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