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Expose PG_VERSION_NUM (e.g., "90600") as a Make variable; but for consistency with the other Make variables holding similar info, call the variable just VERSION_NUM not PG_VERSION_NUM. There was some discussion of making this value available as a pg_config value as well. However, that would entail substantially more work than this two-line patch. Given that there was not exactly universal consensus that we need this at all, let's just do a minimal amount of work for now. Back-patch of commit a5d489ccb7e613c7ca3be6141092b8c1d2c13fa7, so that this variable is actually useful for its intended purpose sometime before 2020. Michael Paquier, reviewed by Pavel Stehule
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. 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/.
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