[patch] ATLAS/FFTW cross-compilation, scalar blocks in distr expr, release.sh

[Jules Bergmann]

This patch fixes cross-compilation (building a 32-bit library on a 
64-bit machine) for ATLAS and FFTW.  For FFTW this is just passing the 
host/build/target options.  For ATLAS, this also requires passing values 
for some options that were previously being detected by running test 
programs (i.e. SIMD variant, FORTRAN string convention, etc) and 
removing hard-coded references to gcc.  (I've built the 
"SerialBuiltin32" variant several times, and this seems to be working.)

This patch also changes how binary expression blocks determine their 
size.  If one operand block is a scalar block, the other operand is used 
to determine size.  This allows scalar blocks in distributed expressions 
to be reused directly in the local version of the expression.

Finally, this patch includes yet another script that is a thin wrapper 
on 'package' to automate parts of the release process.  The intent is 
that a release process will look something like this:

1. On Sethra, check out sources from CVS, build a source package:

	release.sh -w src

2. Manually copy the source package from sethra to cugel:

	cp ...

3. On Cugel, build and test binary packages from the source package:

	relese.sh -w all

In the future, if we put 'xep' on cugel, we can do the whole process on 
one machine (although cugel doesn't seem to have the latest docbook 
release -- that would also need fixed).

					-- Jules
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