linux-kernel - Re: [RFC] asm-generic/{unistd,types,posix

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Message-Id: <20090401213219.7B324FC3AB@magilla.sf.frob.com>
Date:	Wed,  1 Apr 2009 14:32:19 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Will Newton <will.newton@...il.com>,
	Geert Uytterhoeven <geert.uytterhoeven@...il.com>,
	michal.simek@...alogix.com,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org, linux-api@...r.kernel.org,
	Chen Liqin <liqin.chen@...plusct.com>
Subject: Re: [RFC] asm-generic/{unistd,types,posix_types}.h for new arch

> Actually, gcc does have the _LP64 and __SIZEOF_POINTER__ macros (as well 
> as __CHAR_BIT__), although I don't know how far back it does have that. 
>      If it has been with us for long enough it might be possible to 
> switch over to using panarch macros.

Worst case the oldest compilers had <limits.h> and 
"#if ULONG_MAX == 0xffffffffUL", though I wouldn't like
myself to be using a setup where <limits.h> got pulled in.


Thanks,
Roland
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