how to tell 64 vs 32 bit architecture ?

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From

Luigi Rizzo <rizzo@icir.org>

Date

6 Sep 2007 18:45:23

Subject

how to tell 64 vs 32 bit architecture ?

Message-ID

20070906111028.A83649@xorpc.icir.org

Replies

Yan, Giorgos Keramidas, M. Warner Losh

Referenced by

Yan, Luigi Rizzo, Giorgos Keramidas, Erich Dollansky, bruce@cran.org.uk, Luigi Rizzo, Giorgos Keramidas, Luigi Rizzo, Giorgos Keramidas, Yan, Fabio Checconi, M. Warner Losh, Luigi Rizzo, Luigi Rizzo, Kostik Belousov, Luigi Rizzo, Andrew Milton, Andrew Milton

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hi,
i was wondering what is the proper way to tell a 64 vs 32 bit architecture.
 
I see that some code in sys/ uses  ' #ifdef __LP64__ ' but i am not
sure if this is generic enough (ie not gcc or FreeBSD specific),
and also suitable for userland (i.e. works on linux or other platforms
as well).
 
	cheers
	luigi

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