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The method we've traditionally used, of redeclaring strerror_r() to see if the compiler complains of inconsistent declarations, turns out not to work reliably because some compilers only report a warning, not an error. Amazingly, this has gone undetected for years, even though it certainly breaks our detection of whether strerror_r succeeded. Let's instead test whether the compiler will take the result of strerror_r() as a switch() argument. It's possible this won't work universally either, but it's the best idea I could come up with on the spur of the moment. Back-patch of commit 751f532b9. Buildfarm results indicate that only icc-on-Linux actually has an issue here; perhaps the lack of field reports indicates that people don't build PG for production that way. Discussion: https://postgr.es/m/10877.1537993279@sss.pgh.pa.us
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/.