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Before, each documentation target that built something from postgres.sgml ran xmllint first to validate the input. Here, we change it so that the validation only runs once and produces an output file, and all the other targets build from that output file. This avoids redundant work when building multiple documentation targets (such as html and man). Also, when we run xmllint, we can resolve entities (included files). This helps with tools that don't support vpath builds, such as dbtoepub. All this also organizes the make targets a bit better for implementing equivalent steps in meson. Discussion: https://www.postgresql.org/message-id/e3ae16de-c9f9-f559-2d11-70b1342ae3d1@enterprisedb.com
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: https://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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.