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Since our substitute snprintf now returns a C99-compliant result, there's no need anymore to have complicated code to cope with pre-C99 behavior. We can just make configure substitute snprintf.c if it finds that the system snprintf() is pre-C99. (Note: I do not believe that there are any platforms where this test will trigger that weren't already being rejected due to our other C99-ish feature requirements for snprintf. But let's add the check for paranoia's sake.) Then, simplify the call sites that had logic to cope with the pre-C99 definition. I also dropped some stuff that was being paranoid about the possibility of snprintf overrunning the given buffer. The only reports we've ever heard of that being a problem were for Solaris 7, which is long dead, and we've sure not heard any reports of these assertions triggering in a long time. So let's drop that complexity too. Likewise, drop some code that wasn't trusting snprintf to set errno when it returns -1. That would be not-per-spec, and again there's no real reason to believe it is a live issue, especially not for snprintfs that pass all of configure's feature checks. Discussion: https://postgr.es/m/17245.1534289329@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/.