Обсуждение: Unable to createlang

I am having a problem trying to create a language in a new install of Postgres
  - I have installed postgres 9.1 on a minimal (i.e. no GUI) CentOS 6.2 system.
  - Psql is running and I am able to connect to the database from pgAdmin running on a Windows box.
  - Postgres was installed in /opt/postgres
  - The data was placed in /var/postgres/data.

I am migrating a database from an 8.4 system to the new system. I am trying to add the plperl and plperlu languages,
whichare used in the 8.4 system.  

The command I am using is:

    createlang -U postgres plperl hf-hvpa

The message I get back is:

    createlang: language installation failed: ERROR:  could not load library "/opt/postgres/lib/postgresql/plperl.so":
libperl.so:cannot open shared object file: No such file or directory 

I am doing this as the root user, but I have also tried it using my login and as the postgres user. The plperl.so file
isin the indicated directory, but I am not sure what the reference to libperl.so means. Is that a separate file I need
todownload?  

I am fairy new to both Linux and Postgres, however I have successfully installed Postgres on a Windows systems.

Sincerely appreciate any help.

Tom Harkaway

Tom Harkaway wrote:
> The command I am using is:
>
>     createlang -U postgres plperl hf-hvpa
>
> The message I get back is:
>
>     createlang: language installation failed: ERROR:  could not load
library
> "/opt/postgres/lib/postgresql/plperl.so": libperl.so: cannot open
shared object file: No such file or
> directory

Try "ldd /opt/postgres/lib/postgresql/plperl.so" and you'll see what it
means.

PL/Perl needs Perl, and in your case it cannot find the Perl shared
library
in the library search path.

You have several options:
- Rebuild PostgreSQL without --disable-rpath.
- Add the directory that contains libperl.so to /etc/ld.so.conf and
  run "ldconfig" as root user.  Then start the PostgreSQL server.
- Set the environment variable LD_LIBRARY_PATH to contain the
  directory that contains libperl.so and export it in the environment
  of the PostgreSQL server.  Then start the server.

The third method is the worst.

Another thing:
Never do anything as root user unless you have to. Really.

Yours,
Laurenz Albe