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Previously, the port number used in this test script was hard-wired at pg_upgrade's default of 50432; which is not so great because parallel build runs might conflict. Commit 3d53173e20d151341f894f79d556768c845ba3e4 removed this setting for the postmasters started by the script proper (not by pg_upgrade), which didn't do anything to fix that problem and also guaranteed a failure if there was a live postmaster at the build's default port number. Instead, select a non-conflicting temporary port number in the same way that pg_regress.c does. (Its method isn't entirely bulletproof, but given the lack of complaints I'm not going to worry about that today.) In passing, unset MAKEFLAGS and MAKELEVEL to avoid problems with the script's internal invocations of make, for the same reason pg_regress.c does: it could cause problems in a parallel make.
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.