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91a1651057
Autoconf's AC_CHECK_DECLS() always defines HAVE_DECL_whatever as 1 or 0, but some of the entries in msvc/Solution.pm showed such symbols as "undef" instead of 0. Fix that for consistency. There's no live bug in current usages AFAICS, but it's not hard to imagine one creeping in if more-complex #if tests get added. Back-patch to v13, which is as far back as Solution.pm contains this data. The inconsistency still exists in the manually-filled pg_config_ext.h.win32 files of older branches; but as long as the problem is only latent, it doesn't seem worth the trouble to clean things up there. Discussion: https://postgr.es/m/3185430.1626133592@sss.pgh.pa.us
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/.