From: Jim Peters (jim_at_uazu.net)
Date: 2002-03-01 11:41:28
Doug Sutherland wrote:
> A note for Jim: there is apparently a way to install FFTW
> for BOTH single and double precision on the same machine,
> as long as you don't use both in the SAME program.
Yes, this is what I mentioned earlier. As I said, I haven't tried it.
This looks like a good way to go (and more standard), even if we need
to change the #include "fftw.h" line or functions names or whatever.
> The binaries will only work if we are on same major kernel
> revision and same glibc version. Jim's binary would not
> run on my system because I'm using Glibc 2.1.3 and Jim is
> using Glibc 2.2. So what kernel and Glibc version are you
> using, and what version of the compiler?
I don't think it is so sensitive to the kernel version. Most stuff
works fine between kernel versions, as far as I am aware. However,
the GLIBC version is pretty important, as the executable links with
it.
> Good stuff, we should be working on shared libraries.
I agree -- use the --enable-shared option if it works.
> According to the FFTW FAQ, the enable-i386-hacks is for double
> precision transforms:
>
> If we are doing only single precision transforms, perhaps
> we don't need to enable the pentium hacks?
>
> Can we skip the enable-i386-hacks for single precision?
Yes, I think you are right. This may have been from when I was still
experimenting with double-precision for the transforms.
Cheers --
Jim
-- Jim Peters (_)/=\~/_(_) jim_at_uazu.net (_) /=\ ~/_ (_) Uazú (_) /=\ ~/_ (_) http:// B'ham, UK (_) ____ /=\ ____ ~/_ ____ (_) uazu.net
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