Re: 2.1.101 warnings on alpha (patch)

David S. Miller (
Fri, 15 May 1998 07:51:34 -0700

Date: Fri, 15 May 1998 13:56:07 +0200
From: Christian Groessler <>

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 ...
... 64bit version ...

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__)

which is pretty unclean and should be fixed up. But at the moment
there is no other reliable way to check it.

David S. Miller

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