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doc: Correct documentation of install-time environment variables 

Since approximately PostgreSQL 10, it is no longer required that
environment variables at installation time such as PERL, PYTHON, TCLSH
be "full path names", so change that phrasing in the installation
instructions.  (The exact time of change appears to differ for PERL
and the others, but it works consistently in PostgreSQL 10.)

Also while we're here document the defaults for PERL and PYTHON, but
since the search list for TCLSH is so long, let's leave that out so we
don't need to maintain a copy of that list in the installation
instructions.
This commit is contained in:
Peter Eisentraut 2019-01-11 17:21:45 +01:00
parent 96b8b8b6f9
commit 8b89a88618
1 changed files with 6 additions and 5 deletions
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11
doc/src/sgml/installation.sgml
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@ -1484,8 +1484,9 @@ su - postgres
<term><envar>PERL</envar></term>
<listitem>
<para>
Full path name of the Perl interpreter. This will be used to
determine the dependencies for building PL/Perl.
Perl interpreter program. This will be used to determine the
dependencies for building PL/Perl. The default is
<command>perl</command>.
</para>
</listitem>
</varlistentry>
@ -1494,13 +1495,13 @@ su - postgres
<term><envar>PYTHON</envar></term>
<listitem>
<para>
Full path name of the Python interpreter. This will be used to
Python interpreter program. This will be used to
determine the dependencies for building PL/Python. Also,
whether Python 2 or 3 is specified here (or otherwise
implicitly chosen) determines which variant of the PL/Python
language becomes available. See
<xref linkend="plpython-python23"/>
for more information.
for more information. The default is <command>python</command>.
</para>
</listitem>
</varlistentry>
@ -1509,7 +1510,7 @@ su - postgres
<term><envar>TCLSH</envar></term>
<listitem>
<para>
Full path name of the Tcl interpreter. This will be used to
Tcl interpreter program. This will be used to
determine the dependencies for building PL/Tcl, and it will
be substituted into Tcl scripts.
</para>