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25.2. Building and Installing PL/Perl

If the --with-perl option was supplied to the configure script, the PostgreSQL build process will attempt to build the PL/Perl shared library and install it in the PostgreSQL library directory.

On most platforms, since PL/Perl is a shared library, the libperl library must be a shared library also. At the time of this writing, this is almost never the case in prebuilt Perl packages. If this difficulty arises in your situation, a message like this will appear during the build to point out this fact:

*** Cannot build PL/Perl because libperl is not a shared library.
*** You might have to rebuild your Perl installation.  Refer to
*** the documentation for details.

If you see this, you will have to re-build and install Perl manually to be able to build PL/Perl. During the configuration process for Perl, request a shared library.

After having reinstalled Perl, change to the directory src/pl/plperl in the PostgreSQL source tree and issue the commands

gmake clean
gmake all
gmake install

to complete the build and installation of the PL/Perl shared library.

To install PL/Perl and/or PL/PerlU in a particular database, use the createlang script, for example createlang plperl dbname or createlang plperlu dbname.

Tip: If a language is installed into template1, all subsequently created databases will have the language installed automatically.

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