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With optimizations enabled at least one compiler, clang 3.7, optimized away the crc intrinsics knowing that the result went on unused and has no side effects. That can trigger errors in code generation when the intrinsic is used, as we chose to use the intrinsics without any additional compiler flag. Return the computed value to prevent that. With some more pedantic warning flags (-Wold-style-definition) the configure test failed to recognize the existence of _mm_crc32_u* intrinsics due to an independent warning in the test because the test turned on -Werror, but that's not actually needed here. Discussion: 20150814092039.GH4955@awork2.anarazel.de Backpatch: 9.5, where the use of crc intrinsics was integrated. |
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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: 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/.