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403a8c7629
clang 13 with -Wextra warns that "performing pointer subtraction with a null pointer has undefined behavior" in the places where freepage.c tries to set a relptr variable to constant NULL. This appears to be a compiler bug, but it's unlikely to get fixed instantly. Fortunately, we can work around it by introducing an inline support function, which seems like a good change anyway because it removes the macro's existing double-evaluation hazard. Backpatch to v10 where this code was introduced. Patch by me, based on an idea of Andres Freund's. Discussion: https://postgr.es/m/48826.1648310694@sss.pgh.pa.us |
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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/.