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Commit 65abaab547a5758b tried to prevent the scaling constants used in the degree-based trig functions from being precomputed at compile time, because some compilers do that with functions that don't yield results identical-to-the-last-bit to what you get at runtime. A report from Peter Eisentraut suggests that some recent compilers are smart enough to see through that trick, though. Instead, let's put the inputs to these calculations into non-const global variables, which should be a more reliable way of convincing the compiler that it can't assume that they are compile-time constants. (If we really get desperate, we could mark these variables "volatile", but I do not believe we should have to.)
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/.