From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
---|---|
To: | Kynn Jones <kynnjo(at)gmail(dot)com> |
Cc: | pgsql-general General <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Which header and lib files to use when compiling libpq-code? |
Date: | 2009-04-27 15:10:42 |
Message-ID: | 20090427151042.GH4676@svana.org |
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Lists: | pgsql-general |
On Mon, Apr 27, 2009 at 10:51:45AM -0400, Kynn Jones wrote:
> I need to compile some code that uses libpq. For this I need to determine
> the directories to use for the header and library files.
>
> The machine I'm using has multiple copies of the files libpq-fe.h and
> libpq.a. How can I determine which one of all these copies are the ones
> that correspond to the Pg server that is currently running on this system?
> (FWIW, the OS here is Ubuntu Linux.)
In general you don't need to match the server version, the protocol
hasn't changed much in a while so as long as it's less than a few years
old it'll work. New versions have more features though, obviously.
> I tried the naive approach of using the "newest" versions of these files, as
> measured by their modification times. This produced disastrous results.
> The code compiled, but resulted in a program that failed in bizarre and
> unpredictable ways, which strongly hinted at one or more silent segmentation
> violations in the C code. I conjectured that this was the result of a
> mismatched header or library file. Sure enough, the bizarre failures
> disappeared when I used a different set of header and library files.
Given you're using Ubuntu, why not just install postgresql-dev and use
/usr/include/postgresql.
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Please line up in a tree and maintain the heap invariant while
> boarding. Thank you for flying nlogn airlines.
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