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Is there a community-approved method for determining in configure.ac
whether or not you're building (targeting) 64-bit code?
Seems that given the recent increase in popularity of 64-bit hardware,
it might be a good idea to add a standard Autoconf test for native word
size.
I realize that there are several important permutations here - such as
cross-compiling (eg., $build vs $host), and specifically requesting
32-bit code on 64-bit hardware. In order to set proper options when the
user requests 32-bit code on a 64-bit system, you first have to know
what sort of system you're targeting.
Currently, I'm doing this as a first cut:
platform_bits=32
case $host in
*64*-*-*)
platform_bits=64
;;
esac
I realize this is a TERRIBLE way to find out, as many CPU's don't have
"64" in their name, but it catches several common cases (x86_64, ia64,
powerpc64, hppa64, sparc64, etc) anyway. That's why I'm asking.
Thanks,
John
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