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Returning the direct result of bit arithmetic, in a macro intended to be used in a boolean manner, can be problematic if the return value is stored in a variable of type 'bool'. If bool is implemented using C99's _Bool, that can lead to comparison failures if the variable is then compared again with the expression (see ginStepRight() for an example that fails), as _Bool forces the result to be 0/1. That happens in some configurations of newer MSVC compilers. It's also problematic when storing the result of such an expression in a narrower type. Several gin macros have been declared in that style since gin's initial commit in 8a3631f8d86. There's a lot more macros like this, but this is the only one causing regression test failures; and I don't want to commit and backpatch a larger patch with lots of conflicts just before the next set of minor releases. Discussion: 20150811154237.GD17575@awork2.anarazel.de Backpatch: All supported branches
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/.