libpq.a and Xcode on Mac OS X

Hi Folks:

In an attempt to optimize retrieving BLOBs from my PostgreSQL DB I
embarked on a mission to write functions in C to directly access the
back-end using the libpq.a library.

I copied libpq.a from my /usr/local/pgsql/lib/libpq.a installation
into my Xcode project, added all necessary includes and the standard
libpq-fe.h header. My test program builds and runs fine, links
against libpq.a no problem, but upon execution of a simple:

conn = PQconnectdb(conninfo);

(taken from the Postgres examples) the debugger stops in asm code
(presumably the library) with the error:

0x90047960 <+0000> li r0,37
0x90047964 <+0004> sc
0x90047968 <+0008> b 0x90047970 <kill+16>
0x9004796c <+0012> blr
...

Cannot access memory at address 0x0.

I'm using Xcode 2.4 on Mac OS X 10.4.8.

Do you have any ideas or does someone have a simple Xcode project
that would show me how to properly use libpq.a directly from a C
program? Is there an OS X-specific site with examples I could browse
through?

Any advice greatly appreciated. I'm stuck very early in my attempts!

thanks,
Peter.

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Peter K. Stys, MD
Professor of Medicine(Neurology), Senior Scientist
Ottawa Health Research Institute, Div. of Neuroscience
Ottawa Hospital / University of Ottawa
Ontario, CANADA
tel: (613)761-5444
fax: (613)761-5330
http://www.ohri.ca/profiles/stys.asp
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