f7 32bit/64bit compiles.
Sam Varshavchik
mrsam at courier-mta.com
Wed Jul 18 23:31:22 UTC 2007
clemens at dwf.com writes:
> OK, a dumb question, but Ive always just assumed that all my machines were
> 32bit, and ignored 64bit stuff.
>
> Now more than 1/2 are 64bit.
>
> So the dumb question: How do you compile in 64bit mode?
> Im sure its there in the gcc man page, but after scanning the first
> 20-30pages Im about to go to sleep...
>
> And, is there some place to put this so that gcc ALWAYS compiles
> in 64bit mode? Or does so by default.
On 64 bit machines, gcc compiles by default to 64 bit code.
> Or does gcc look at the machine architecture and make a decision on
> its own.
On 64 bit Fedora, gcc by default compiles to 64 bit. That's it.
> So, a quick discussion of the niceties of 32/64bit compiling would be
> appreciated.
There's nothing really to discuss. On PowerPC-based hardware, gcc compiles,
by default, to powerpc code. On 32 bit Intel, to 32 bit Intel code, on 64
bit Intel, to 64 bit Intel. That's it.
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