I think scientific users want not universal (i386 and ppc) but 64-bit
(x86_64 and ppc64)
if they have a 64-bit machine.
If a package is build for all the four (i386 x86_64 ppc ppc64),
there will be not problem but it is not always easy to support this.
For example source in fortran is problematic.
gfortran in gcc43 -m64 option but not -arch x86_64 or ppc64.
To build universal one needs to go through build process twice with -
m32 and -m64
and use lipo later.
I have not yet able to provide g95 64-bit.
My point is building for two types of cpus and for 32/64 bit are not
always the same
and an average scientific user wants 64 bit version for the host (her/
his local) machine.
A universal Portfile has been posted for fftw-3, which is under
examination.
<https://trac.macports.org/ticket/13814>
It would be nice if port command itself have a similar function.
Otherwise it would be nice to enable the user to choose 32/64 bit.
Takeshi
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