Getting the redesigned NArray working

On Ubuntu 10.10, this is roughly what I did, which I originally posted here (there may be other dependencies I've neglected to include):

sudo apt-get install libatlas-dev libatlas-base-dev
# modify extconf.rb:
have_header("atlas/cblas.h")   ===>   have_header("cblas.h")
# modify linalg.c
#include <atlas/cblas.h>   ===>   #include <cblas.h>

For ruby 1.9, you also need to change a few array things (typical for moving from 1.8 to 1.9 extension code):

diff -r ../narray-new-1.8/narray.c ./narray.c
211,212c211,212
<     n = RARRAY(idxargs)->len;
<     ptr = RARRAY(idxargs)->ptr;
---
>     n = RARRAY_LEN(idxargs);
>     ptr = RARRAY_PTR(idxargs);
232c232,233
< const static size_t zero=0;
---
> //const static size_t zero=0;
> static const size_t zero=0;
463c464
<      ndim = RARRAY(v)->len;
---
>      ndim = RARRAY_LEN(v);
761a763
>     VALUE *ptr;
774,775c776,778
<  RARRAY(v)->ptr[i] = SIZE2NUM(na->shape[c]);
<  RARRAY(v)->len++;
---
>  RARRAY_PTR(v)[i] = SIZE2NUM(na->shape[c]);
>  ptr = RARRAY_LEN(v);
>     ptr++;
diff -r ../narray-new-1.8/nstruct.c ./nstruct.c
301c301
<      ndim = RARRAY(argv[i])->len;
---
>      ndim = RARRAY_LEN(argv[i]);

% ruby extconf.rb
% make

# in your code (or irb):
require 'narray'
# or:
require './narray.so'

now, you should be able to play around with it.