[DebianGIS-dev] Help with postgis and backport to lenny using pbuilder

[Alan Boudreault]

Hi Stephen,

Just a quick thing you could try: "apt-get install -f" , this should 
install the missing dependency and continue the postgis package 
installation normally. Be sure you have lenny-backports in you 
sources.list because the libpq5 version 8.4 is there. Note that dpkg 
will never download and install missing dependencies, it's not its job. 
It's the apt-get job. That's why you have to call apt-get to fix things 
and continue what dpkg started before. You can also take a look at the 
"gdebi" utility. It's a tool to install a .deb file and it *should* 
(never used it much) call apt-get itself to solve missing dependencies.

see also my comments below....

Stephen Woodbridge wrote:
> Hi all,
>
> I have just found pbuilder and I'm using it with the pkg-grass debian 
> package definitions for geos-3.2.0 and postgis-1.5.1 building packages 
> for lenny. This is all very cool and makes things soo much easier. I 
> am also using some packages backports.org.
>
> So, I have gotten things setup and have been able to build packages, 
> but postgis and postgresql-8.3-postgis will not install giving the 
> following error:
>
> woodbri at mappy:/u/local/src$ sudo dpkg -i postgis_1.5.1-1_amd64.deb
> [sudo] password for woodbri:
> (Reading database ... 75044 files and directories currently installed.)
> Preparing to replace postgis 1.5.1-1 (using postgis_1.5.1-1_amd64.deb) 
> ...
> Unpacking replacement postgis ...
> dpkg: dependency problems prevent configuration of postgis:
>  postgis depends on libpq5 (>= 8.4~0cvs20090328); however:
>   Version of libpq5 on system is 8.3.9-0lenny1.
> dpkg: error processing postgis (--install):
>  dependency problems - leaving unconfigured
> Processing triggers for man-db ...
> Errors were encountered while processing:
>  postgis
>
> I have attached the postgis_1.5.1-1_amd64.build.gz from the pdebuild.
>
> I think this might be because the control_lenny file has BOTH
>    postgresql-server-dev-8.3, postgresql-server-dev-8.4
> as Build-Depends for postgis.
>

That is ok, the package is made to build the postgis extension for both 
versions.

> Would this not then require BOTH
>
> libpq5 8.4~0cvs20090328 from postgresql-8.4
> libpq5 8.3.9-0lenny1    from postgresql-8.3
>
> to be part of the dependencies, probably with the later one winning or 
> whatever?
>

No. libpq5 is the library that allows user programs to communicate with 
a postgresql server. The version of libpq5 >=8.4 is compatible to 
communicate with servers from PostgreSQL 8.2 or later. So it's all right 
that the postgis package has libpq5 >=8.4.x as dependency.

> Any ideas how to fix this? Does the control file need to be split into 
> two files one for postgresql-8.3 and one for postgresql-8.4?  would 
> the rules file need to changes also or instead of the control file?
>

As I said, the control and rule files are ok and build the extension for 
postgresql 8.3 and 8.4.

> I've put a lot of time and effort into trying to resolve this, but I 
> just don't know that much about building debian packages. Reall need 
> to guidance and help on this one.
>
> Best regards,
>   -Steve
>   
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>
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Hope this help,

regards,
Alan

-- 

Alan Boudreault
Mapgears
http://www.mapgears.com/