I got it to work by first removing all versions of postgres from my system
and then installing the gdal and gdal-dev packages.

I think somehow, somewhere there was a symlink pointing to the wrong
version of a lib.


On Wed, Sep 30, 2020 at 3:30 PM Matthys Kroon <[email protected]> wrote:

> Thanks for your help.
>
> I do seem to have the file. I have libpq and libpq5 packages installed.
>
> /usr/lib64#ls -alh libpq.so*
> lrwxrwxrwx. 1 root root   13 Aug 20 14:42 libpq.so -> libpq.so.5.12
> lrwxrwxrwx. 1 root root   13 Aug 20 14:42 libpq.so.5 -> libpq.so.5.12
> -rwxr-xr-x. 1 root root 1.3M Aug 20 14:42 libpq.so.5.12
>
>
> I think it has something to do with the postgres version. All those
> references have "@RHPG_9.6" which I assume references postgres 9.6. I
> also have postgres 11 and 12 installed on the system (was developing
> postgres apps in my previous job). I think somehow I have a later version
> of libpq installed.
>
> I'm going to try and verify that I have the correct version installed.
>
>
> On Wed, Sep 30, 2020 at 2:38 PM Andrew C Aitchison <[email protected]>
> wrote:
>
>> On Wed, 30 Sep 2020, Matthys Kroon wrote:
>>
>> > Hi,
>> >
>> > I'm trying to build "sf" package in R on Fedora 32 but it fails to
>> > configure gdal. The error output is below:
>> >
>> > It seems to be some issue referring to a postgres lib? I have
>> libpq-devel
>> > installed.
>> >
>> > I googled for hours and I'm still stuck. Please let me know what other
>> > information I can provide to help troubleshoot.
>> >
>> > /usr/bin/ld /usr/lib64/libgdal.so
>> > ld: warning: cannot find entry symbol _start; not setting start address
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQcmdStatus@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQfname@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> > `PQsetNoticeProcessor@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQftable@RHPG_9.6'
>>
>> On RHEL6 /usr/lib64/libpq.so.5.2 is in the package "postgresql-libs";
>> on Ubuntu20.04 /usr/lib/x86_64-linux-gnu/libpq.so.5.12 is in the package
>> "libpq5". The dev/devel packages have libpq.so as a symbolic link to
>> these numbered .so libraries, so I guess you need a non-devel package
>> like libpq or libpq5.
>>
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQstatus@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQftablecol@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQconnectdb@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> > `PQescapeStringConn@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `lo_close@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQputCopyEnd@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQgetvalue@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQgetisnull@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQftype@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQfmod@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `lo_creat@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> `PQresultStatus@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `lo_read@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQexec@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> > `PQsetClientEncoding@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQgetlength@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> `PQputCopyData@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQgetResult@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to `lo_write@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQfinish@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQclear@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> `PQerrorMessage@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQnfields@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `lo_open@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQexecParams@RHPG_9.6
>> '
>> > ld: /usr/lib64/libgdal.so: undefined reference to `PQntuples@RHPG_9.6'
>> > ld: /usr/lib64/libgdal.so: undefined reference to
>> > `PQresultErrorMessage@RHPG_9.6'
>> >
>> > Thanks for any help.
>> >
>> > Regards,
>> >
>> > Matthys
>> >
>>
>> --
>> Andrew C. Aitchison                                     Kendal, UK
>>                         [email protected]
>>
>
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