From: "David S. Miller" <davem@dm.cobaltmicro.com>
To: cpg@aladdin.de
Cc: torvalds@transmeta.com, linux-kernel@vger.rutgers.edu, cpg@aladdin.de
Subject: Re: 2.1.101 warnings on alpha (patch)
Date: Fri, 15 May 1998 07:51:34 -0700 [thread overview]
Message-ID: <199805151451.HAA01712@dm.cobaltmicro.com> (raw)
In-Reply-To: <199805151156.NAA20899@punt.aladdin.de> (message from Christian Groessler on Fri, 15 May 1998 13:56:07 +0200)
Date: Fri, 15 May 1998 13:56:07 +0200
From: Christian Groessler <cpg@aladdin.de>
How does one check whether the host is 64bitty? Like in the above
"#if" or is there another (standard) way?
Unfortunately there is no failsafe way. This is because as a cross
compiler gcc from 32-->64 bit does not get things like:
#if ((~0UL)==0xffffffff)
... 32bit version ...
#else
... 64bit version ...
#endif
correct at all. I think it should be in an asm header file
personally, but if you notice the check for 64-bit is often done as:
#if defined(__sparc_v9__) || defined(__alpha__)
#endif
which is pretty unclean and should be fixed up. But at the moment
there is no other reliable way to check it.
Later,
David S. Miller
davem@dm.cobaltmicro.com
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parent reply other threads:[~1998-05-15 14:48 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <199805151156.NAA20899@punt.aladdin.de>]
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