From: Luis Lavena <luislavena@...>
Date: 2010-03-05T01:25:15+09:00
Subject: Re: Installing Pg gem for PostGreSQL 8.4

On Mar 3, 5:18 pm, Saeed Bhuta <saeed.bh...@placr.co.uk> wrote:
> Reid Thompson wrote:
> > On Wed, 2010-03-03 at 23:59 +0900, Saeed Bhuta wrote:
>
> >> -rw-r--r-- 1 root root  7583 2009-09-09 17:49 pg_config_manual.h
> >> drwxr-xr-x 3 root root  4096 2010-03-02 10:13 8.4
> > hmm -- until today, on my box
>
> > $ sudo gem install pg
>
> > resulted in 0.8.0 being installed
>
> > today, it installed 0.9.0.
>
> > try this
>
> > in your gems directory, remove the 0.9.0 directory
> > (on my box this is at /usr/lib/ruby/gems/1.8/gems/pg-0.9.0)
>
> > then try the install again
>
> > $ sudo gem install pg
>
> Deleted the directory and tried the install again but no luck;
> sudo gem install pg
> Building native extensions.  This could take a while...
> ERROR:  Error installing pg:
>   ERROR: Failed to build gem native extension.
>
> /usr/bin/ruby1.8 extconf.rb
> checking for pg_config... yes
> checking for libpq-fe.h... yes
> checking for libpq/libpq-fs.h... yes
> checking for PQconnectdb() in -lpq... no
> checking for PQconnectdb() in -llibpq... no
> checking for PQconnectdb() in -lms/libpq... no
> Can't find the PostgreSQL client library (libpq)
>

Can you post the contents of mkmf.log that are located here: /var/lib/
gems/1.8/gems/pg-0.9.0/ext

Seems that it finds the headers, the pg_config tool, but It cannot
link to it, which may be related to 32/64 bits binaries.

--
Luis Lavena