David Garamond wrote:
> I'm not familiar with the packaging system used in Mac OS X, but have 
> you installed the 'postgresql-devel' package (which contains the 
> necessary *.h files)? If yes, then check the correct path for 
> server/utils/array.h (e.g. is it really in 
> /usr/local/src/postgresql-7.4.1/src/include/?)

FWIW, this was not a MacOS X specific package. It was precisely:

ftp://ftp9.us.postgresql.org/pub/mirrors/postgresql/source/v7.4.1/postgresql-base-7.4.1.tar.gz

which has array.h inside /src/include/utils/ and *not* 
/src/include/server/utils/

Dunno when this changed, but seems to be a minor broken part of the 
PL/Ruby install.

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