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In general, Postgres requires -fno-strict-aliasing with compilers that implement C99 strict aliasing rules. There's little hope of getting rid of that overall. But it seems like it would be a good idea if storage/checksum_impl.h in particular didn't depend on it, because that header is explicitly intended to be included by external programs. We don't have a lot of control over the compiler switches that an external program might use, as shown by Michael Banck's report of failure in a privately-modified version of pg_verify_checksums. Hence, switch to using a union in place of willy-nilly pointer casting inside this file. I think this makes the code a bit more readable anyway. checksum_impl.h hasn't changed since it was introduced in 9.3, so back-patch all the way. Discussion: https://postgr.es/m/1535618100.1286.3.camel@credativ.de |
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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/.